./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--media--firewire--firedtv.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 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/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--media--firewire--firedtv.ko-main.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash 27a3a7bacd5bfaa71ec936fdb60b09adb3a573df62752fe262468d392ed108c3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 23:51:42,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 23:51:42,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 23:51:42,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 23:51:42,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 23:51:42,960 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 23:51:42,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 23:51:42,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 23:51:42,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 23:51:42,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 23:51:42,966 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 23:51:42,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 23:51:42,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 23:51:42,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 23:51:42,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 23:51:42,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 23:51:42,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 23:51:42,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 23:51:42,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 23:51:42,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 23:51:42,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 23:51:42,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 23:51:42,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 23:51:42,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 23:51:42,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 23:51:42,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 23:51:42,990 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 23:51:42,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 23:51:42,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 23:51:42,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 23:51:42,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 23:51:42,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 23:51:42,994 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 23:51:42,995 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 23:51:42,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 23:51:42,996 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 23:51:42,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 23:51:42,997 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 23:51:42,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 23:51:42,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 23:51:42,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 23:51:42,999 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 23:51:43,019 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 23:51:43,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 23:51:43,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 23:51:43,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 23:51:43,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 23:51:43,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 23:51:43,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 23:51:43,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 23:51:43,022 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 23:51:43,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 23:51:43,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 23:51:43,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 23:51:43,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 23:51:43,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 23:51:43,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 23:51:43,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 23:51:43,024 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 23:51:43,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 23:51:43,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 23:51:43,024 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 23:51:43,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 23:51:43,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 23:51:43,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 23:51:43,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 23:51:43,025 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 23:51:43,025 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 23:51:43,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 23:51:43,026 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 23:51:43,026 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 23:51:43,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 23:51:43,027 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 23:51:43,027 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27a3a7bacd5bfaa71ec936fdb60b09adb3a573df62752fe262468d392ed108c3 [2021-11-16 23:51:43,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 23:51:43,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 23:51:43,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 23:51:43,230 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 23:51:43,230 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 23:51:43,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--media--firewire--firedtv.ko-main.cil.out.i [2021-11-16 23:51:43,278 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/081f3c67e/0ece8886664d4b23a6f52b9ce3d1e2d6/FLAGbf0e671fc [2021-11-16 23:51:43,868 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 23:51:43,868 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--media--firewire--firedtv.ko-main.cil.out.i [2021-11-16 23:51:43,904 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/081f3c67e/0ece8886664d4b23a6f52b9ce3d1e2d6/FLAGbf0e671fc [2021-11-16 23:51:44,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/081f3c67e/0ece8886664d4b23a6f52b9ce3d1e2d6 [2021-11-16 23:51:44,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 23:51:44,040 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 23:51:44,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 23:51:44,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 23:51:44,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 23:51:44,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:51:44" (1/1) ... [2021-11-16 23:51:44,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f6ac991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:51:44, skipping insertion in model container [2021-11-16 23:51:44,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:51:44" (1/1) ... [2021-11-16 23:51:44,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 23:51:44,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 23:51:45,502 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/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--media--firewire--firedtv.ko-main.cil.out.i[276778,276791] [2021-11-16 23:51:45,627 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 23:51:45,654 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 23:51:45,928 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/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--media--firewire--firedtv.ko-main.cil.out.i[276778,276791] [2021-11-16 23:51:45,935 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 23:51:46,005 INFO L208 MainTranslator]: Completed translation [2021-11-16 23:51:46,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:51:46 WrapperNode [2021-11-16 23:51:46,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 23:51:46,008 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 23:51:46,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 23:51:46,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 23:51:46,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:51:46" (1/1) ... [2021-11-16 23:51:46,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:51:46" (1/1) ... [2021-11-16 23:51:46,213 INFO L137 Inliner]: procedures = 341, calls = 1845, calls flagged for inlining = 158, calls inlined = 154, statements flattened = 4867 [2021-11-16 23:51:46,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 23:51:46,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 23:51:46,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 23:51:46,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 23:51:46,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:51:46" (1/1) ... [2021-11-16 23:51:46,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:51:46" (1/1) ... [2021-11-16 23:51:46,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:51:46" (1/1) ... [2021-11-16 23:51:46,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:51:46" (1/1) ... [2021-11-16 23:51:46,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:51:46" (1/1) ... [2021-11-16 23:51:46,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:51:46" (1/1) ... [2021-11-16 23:51:46,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:51:46" (1/1) ... [2021-11-16 23:51:46,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 23:51:46,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 23:51:46,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 23:51:46,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 23:51:46,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:51:46" (1/1) ... [2021-11-16 23:51:46,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 23:51:46,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 23:51:46,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-16 23:51:46,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-16 23:51:46,517 INFO L130 BoogieDeclarations]: Found specification of procedure queue_iso [2021-11-16 23:51:46,517 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_iso [2021-11-16 23:51:46,518 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2021-11-16 23:51:46,518 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2021-11-16 23:51:46,518 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_channel [2021-11-16 23:51:46,518 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_channel [2021-11-16 23:51:46,518 INFO L130 BoogieDeclarations]: Found specification of procedure fdtv_dvb_register [2021-11-16 23:51:46,518 INFO L138 BoogieDeclarations]: Found implementation of procedure fdtv_dvb_register [2021-11-16 23:51:46,518 INFO L130 BoogieDeclarations]: Found specification of procedure cmp_establish_pp_connection [2021-11-16 23:51:46,518 INFO L138 BoogieDeclarations]: Found implementation of procedure cmp_establish_pp_connection [2021-11-16 23:51:46,519 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-16 23:51:46,519 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-16 23:51:46,519 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-16 23:51:46,519 INFO L130 BoogieDeclarations]: Found specification of procedure node_req [2021-11-16 23:51:46,519 INFO L138 BoogieDeclarations]: Found implementation of procedure node_req [2021-11-16 23:51:46,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-16 23:51:46,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-16 23:51:46,520 INFO L130 BoogieDeclarations]: Found specification of procedure cmp_lock [2021-11-16 23:51:46,520 INFO L138 BoogieDeclarations]: Found implementation of procedure cmp_lock [2021-11-16 23:51:46,520 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_unregister_adapter [2021-11-16 23:51:46,520 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_unregister_adapter [2021-11-16 23:51:46,520 INFO L130 BoogieDeclarations]: Found specification of procedure variable_test_bit [2021-11-16 23:51:46,520 INFO L138 BoogieDeclarations]: Found implementation of procedure variable_test_bit [2021-11-16 23:51:46,520 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-16 23:51:46,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-16 23:51:46,521 INFO L130 BoogieDeclarations]: Found specification of procedure cmp_read [2021-11-16 23:51:46,521 INFO L138 BoogieDeclarations]: Found implementation of procedure cmp_read [2021-11-16 23:51:46,521 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_demux_mutex_of_firedtv [2021-11-16 23:51:46,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_demux_mutex_of_firedtv [2021-11-16 23:51:46,521 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-16 23:51:46,521 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-16 23:51:46,521 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-16 23:51:46,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-16 23:51:46,522 INFO L130 BoogieDeclarations]: Found specification of procedure pad_operands [2021-11-16 23:51:46,522 INFO L138 BoogieDeclarations]: Found implementation of procedure pad_operands [2021-11-16 23:51:46,522 INFO L130 BoogieDeclarations]: Found specification of procedure avc_tuner_set_pids [2021-11-16 23:51:46,522 INFO L138 BoogieDeclarations]: Found implementation of procedure avc_tuner_set_pids [2021-11-16 23:51:46,522 INFO L130 BoogieDeclarations]: Found specification of procedure fdtv_ca_io_poll [2021-11-16 23:51:46,522 INFO L138 BoogieDeclarations]: Found implementation of procedure fdtv_ca_io_poll [2021-11-16 23:51:46,523 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_dmx_release [2021-11-16 23:51:46,523 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_dmx_release [2021-11-16 23:51:46,523 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_generic_release [2021-11-16 23:51:46,523 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_generic_release [2021-11-16 23:51:46,523 INFO L130 BoogieDeclarations]: Found specification of procedure clear_operands [2021-11-16 23:51:46,523 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_operands [2021-11-16 23:51:46,523 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-16 23:51:46,524 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-16 23:51:46,524 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_generic_open [2021-11-16 23:51:46,524 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_generic_open [2021-11-16 23:51:46,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 23:51:46,524 INFO L130 BoogieDeclarations]: Found specification of procedure input_event [2021-11-16 23:51:46,524 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event [2021-11-16 23:51:46,524 INFO L130 BoogieDeclarations]: Found specification of procedure avc_write [2021-11-16 23:51:46,524 INFO L138 BoogieDeclarations]: Found implementation of procedure avc_write [2021-11-16 23:51:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure get_opcr [2021-11-16 23:51:46,525 INFO L138 BoogieDeclarations]: Found implementation of procedure get_opcr [2021-11-16 23:51:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 23:51:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2021-11-16 23:51:46,526 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2021-11-16 23:51:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure collect_channels [2021-11-16 23:51:46,526 INFO L138 BoogieDeclarations]: Found implementation of procedure collect_channels [2021-11-16 23:51:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 23:51:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 23:51:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure fw_iso_context_destroy [2021-11-16 23:51:46,527 INFO L138 BoogieDeclarations]: Found implementation of procedure fw_iso_context_destroy [2021-11-16 23:51:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure fdtv_unregister_rc [2021-11-16 23:51:46,527 INFO L138 BoogieDeclarations]: Found implementation of procedure fdtv_unregister_rc [2021-11-16 23:51:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure avc_tuner_status [2021-11-16 23:51:46,527 INFO L138 BoogieDeclarations]: Found implementation of procedure avc_tuner_status [2021-11-16 23:51:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-16 23:51:46,528 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-16 23:51:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2021-11-16 23:51:46,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2021-11-16 23:51:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-16 23:51:46,528 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-16 23:51:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-16 23:51:46,529 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-16 23:51:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_key [2021-11-16 23:51:46,529 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_key [2021-11-16 23:51:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_avc_mutex_of_firedtv [2021-11-16 23:51:46,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_avc_mutex_of_firedtv [2021-11-16 23:51:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-16 23:51:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-11-16 23:51:46,529 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-11-16 23:51:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure node_remove [2021-11-16 23:51:46,530 INFO L138 BoogieDeclarations]: Found implementation of procedure node_remove [2021-11-16 23:51:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-16 23:51:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure fdtv_dvb_unregister [2021-11-16 23:51:46,530 INFO L138 BoogieDeclarations]: Found implementation of procedure fdtv_dvb_unregister [2021-11-16 23:51:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure add_pid_filter [2021-11-16 23:51:46,530 INFO L138 BoogieDeclarations]: Found implementation of procedure add_pid_filter [2021-11-16 23:51:46,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-16 23:51:46,531 INFO L130 BoogieDeclarations]: Found specification of procedure is_register_rc [2021-11-16 23:51:46,531 INFO L138 BoogieDeclarations]: Found implementation of procedure is_register_rc [2021-11-16 23:51:46,531 INFO L130 BoogieDeclarations]: Found specification of procedure dealloc_channel [2021-11-16 23:51:46,531 INFO L138 BoogieDeclarations]: Found implementation of procedure dealloc_channel [2021-11-16 23:51:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-16 23:51:46,532 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-16 23:51:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-16 23:51:46,532 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-16 23:51:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure print_hex_dump [2021-11-16 23:51:46,533 INFO L138 BoogieDeclarations]: Found implementation of procedure print_hex_dump [2021-11-16 23:51:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-16 23:51:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_avc_mutex_of_firedtv [2021-11-16 23:51:46,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_avc_mutex_of_firedtv [2021-11-16 23:51:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure debug_fcp [2021-11-16 23:51:46,533 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_fcp [2021-11-16 23:51:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure input_sync [2021-11-16 23:51:46,533 INFO L138 BoogieDeclarations]: Found implementation of procedure input_sync [2021-11-16 23:51:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-16 23:51:46,534 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-16 23:51:46,534 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-16 23:51:46,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-16 23:51:46,534 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_net_release [2021-11-16 23:51:46,534 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_net_release [2021-11-16 23:51:46,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 23:51:46,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 23:51:46,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 23:51:46,535 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-16 23:51:46,536 INFO L130 BoogieDeclarations]: Found specification of procedure set_opcr [2021-11-16 23:51:46,536 INFO L138 BoogieDeclarations]: Found implementation of procedure set_opcr [2021-11-16 23:51:46,537 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-16 23:51:46,537 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-16 23:51:46,537 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-16 23:51:46,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-16 23:51:46,537 INFO L130 BoogieDeclarations]: Found specification of procedure fw_iso_buffer_destroy [2021-11-16 23:51:46,537 INFO L138 BoogieDeclarations]: Found implementation of procedure fw_iso_buffer_destroy [2021-11-16 23:51:46,537 INFO L130 BoogieDeclarations]: Found specification of procedure node_probe [2021-11-16 23:51:46,537 INFO L138 BoogieDeclarations]: Found implementation of procedure node_probe [2021-11-16 23:51:46,537 INFO L130 BoogieDeclarations]: Found specification of procedure get_ca_object_pos [2021-11-16 23:51:46,538 INFO L138 BoogieDeclarations]: Found implementation of procedure get_ca_object_pos [2021-11-16 23:51:46,538 INFO L130 BoogieDeclarations]: Found specification of procedure node_update [2021-11-16 23:51:46,538 INFO L138 BoogieDeclarations]: Found implementation of procedure node_update [2021-11-16 23:51:46,538 INFO L130 BoogieDeclarations]: Found specification of procedure avc_register_remote_control [2021-11-16 23:51:46,538 INFO L138 BoogieDeclarations]: Found implementation of procedure avc_register_remote_control [2021-11-16 23:51:46,538 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_dmxdev_release [2021-11-16 23:51:46,538 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_dmxdev_release [2021-11-16 23:51:46,538 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-16 23:51:46,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-16 23:51:46,539 INFO L130 BoogieDeclarations]: Found specification of procedure device_of [2021-11-16 23:51:46,539 INFO L138 BoogieDeclarations]: Found implementation of procedure device_of [2021-11-16 23:51:46,539 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_demux_mutex_of_firedtv [2021-11-16 23:51:46,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_demux_mutex_of_firedtv [2021-11-16 23:51:46,539 INFO L130 BoogieDeclarations]: Found specification of procedure fw_core_remove_address_handler [2021-11-16 23:51:46,539 INFO L138 BoogieDeclarations]: Found implementation of procedure fw_core_remove_address_handler [2021-11-16 23:51:46,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 23:51:46,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 23:51:46,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 23:51:47,075 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 23:51:47,077 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 23:51:55,180 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 23:51:55,191 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 23:51:55,191 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-16 23:51:55,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:51:55 BoogieIcfgContainer [2021-11-16 23:51:55,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 23:51:55,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 23:51:55,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 23:51:55,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 23:51:55,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:51:44" (1/3) ... [2021-11-16 23:51:55,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65960407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:51:55, skipping insertion in model container [2021-11-16 23:51:55,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:51:46" (2/3) ... [2021-11-16 23:51:55,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65960407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:51:55, skipping insertion in model container [2021-11-16 23:51:55,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:51:55" (3/3) ... [2021-11-16 23:51:55,207 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--media--firewire--firedtv.ko-main.cil.out.i [2021-11-16 23:51:55,211 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 23:51:55,211 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 23:51:55,251 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 23:51:55,256 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mLoopAccelerationTechnique=FAST_UPR [2021-11-16 23:51:55,256 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 23:51:55,285 INFO L276 IsEmpty]: Start isEmpty. Operand has 1329 states, 1019 states have (on average 1.3886162904808637) internal successors, (1415), 1042 states have internal predecessors, (1415), 243 states have call successors, (243), 65 states have call predecessors, (243), 65 states have return successors, (243), 243 states have call predecessors, (243), 243 states have call successors, (243) [2021-11-16 23:51:55,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-16 23:51:55,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:51:55,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:51:55,292 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:51:55,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:51:55,295 INFO L85 PathProgramCache]: Analyzing trace with hash -818407598, now seen corresponding path program 1 times [2021-11-16 23:51:55,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:51:55,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106526221] [2021-11-16 23:51:55,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:51:55,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:51:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:51:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:51:55,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:51:55,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106526221] [2021-11-16 23:51:55,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106526221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:51:55,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:51:55,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-16 23:51:55,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005999210] [2021-11-16 23:51:55,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:51:55,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 23:51:55,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:51:55,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 23:51:55,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 23:51:55,616 INFO L87 Difference]: Start difference. First operand has 1329 states, 1019 states have (on average 1.3886162904808637) internal successors, (1415), 1042 states have internal predecessors, (1415), 243 states have call successors, (243), 65 states have call predecessors, (243), 65 states have return successors, (243), 243 states have call predecessors, (243), 243 states have call successors, (243) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-16 23:51:55,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:51:55,838 INFO L93 Difference]: Finished difference Result 3807 states and 5554 transitions. [2021-11-16 23:51:55,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 23:51:55,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-16 23:51:55,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:51:55,870 INFO L225 Difference]: With dead ends: 3807 [2021-11-16 23:51:55,871 INFO L226 Difference]: Without dead ends: 2471 [2021-11-16 23:51:55,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 23:51:55,889 INFO L933 BasicCegarLoop]: 2185 mSDtfsCounter, 1619 mSDsluCounter, 1879 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1619 SdHoareTripleChecker+Valid, 4064 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:51:55,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1619 Valid, 4064 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 23:51:55,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-11-16 23:51:56,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2453. [2021-11-16 23:51:56,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 1894 states have (on average 1.3875395987328405) internal successors, (2628), 1929 states have internal predecessors, (2628), 430 states have call successors, (430), 129 states have call predecessors, (430), 128 states have return successors, (421), 420 states have call predecessors, (421), 421 states have call successors, (421) [2021-11-16 23:51:56,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3479 transitions. [2021-11-16 23:51:56,045 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3479 transitions. Word has length 17 [2021-11-16 23:51:56,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:51:56,047 INFO L470 AbstractCegarLoop]: Abstraction has 2453 states and 3479 transitions. [2021-11-16 23:51:56,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-16 23:51:56,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3479 transitions. [2021-11-16 23:51:56,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-16 23:51:56,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:51:56,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:51:56,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-16 23:51:56,054 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:51:56,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:51:56,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1284284555, now seen corresponding path program 1 times [2021-11-16 23:51:56,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:51:56,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181646560] [2021-11-16 23:51:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:51:56,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:51:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:51:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:51:56,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:51:56,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181646560] [2021-11-16 23:51:56,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181646560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:51:56,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:51:56,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-16 23:51:56,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120418185] [2021-11-16 23:51:56,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:51:56,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 23:51:56,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:51:56,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 23:51:56,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 23:51:56,234 INFO L87 Difference]: Start difference. First operand 2453 states and 3479 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-16 23:51:56,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:51:56,387 INFO L93 Difference]: Finished difference Result 2612 states and 3691 transitions. [2021-11-16 23:51:56,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 23:51:56,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-16 23:51:56,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:51:56,400 INFO L225 Difference]: With dead ends: 2612 [2021-11-16 23:51:56,400 INFO L226 Difference]: Without dead ends: 2608 [2021-11-16 23:51:56,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 23:51:56,412 INFO L933 BasicCegarLoop]: 1886 mSDtfsCounter, 1266 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1266 SdHoareTripleChecker+Valid, 2587 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:51:56,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1266 Valid, 2587 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 23:51:56,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-11-16 23:51:56,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2606. [2021-11-16 23:51:56,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2032 states have (on average 1.391240157480315) internal successors, (2827), 2067 states have internal predecessors, (2827), 432 states have call successors, (432), 142 states have call predecessors, (432), 141 states have return successors, (425), 424 states have call predecessors, (425), 425 states have call successors, (425) [2021-11-16 23:51:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 3684 transitions. [2021-11-16 23:51:56,485 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 3684 transitions. Word has length 19 [2021-11-16 23:51:56,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:51:56,486 INFO L470 AbstractCegarLoop]: Abstraction has 2606 states and 3684 transitions. [2021-11-16 23:51:56,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-16 23:51:56,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 3684 transitions. [2021-11-16 23:51:56,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-16 23:51:56,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:51:56,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:51:56,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-16 23:51:56,493 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:51:56,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:51:56,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1157630563, now seen corresponding path program 1 times [2021-11-16 23:51:56,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:51:56,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806309625] [2021-11-16 23:51:56,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:51:56,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:51:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:51:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:51:56,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:51:56,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806309625] [2021-11-16 23:51:56,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806309625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:51:56,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:51:56,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-16 23:51:56,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318400004] [2021-11-16 23:51:56,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:51:56,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 23:51:56,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:51:56,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 23:51:56,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 23:51:56,607 INFO L87 Difference]: Start difference. First operand 2606 states and 3684 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-16 23:51:56,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:51:56,677 INFO L93 Difference]: Finished difference Result 2608 states and 3685 transitions. [2021-11-16 23:51:56,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 23:51:56,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-16 23:51:56,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:51:56,688 INFO L225 Difference]: With dead ends: 2608 [2021-11-16 23:51:56,688 INFO L226 Difference]: Without dead ends: 2605 [2021-11-16 23:51:56,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 23:51:56,696 INFO L933 BasicCegarLoop]: 1875 mSDtfsCounter, 1859 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1859 SdHoareTripleChecker+Valid, 1875 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:51:56,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1859 Valid, 1875 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 23:51:56,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-11-16 23:51:56,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 2605. [2021-11-16 23:51:56,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2605 states, 2032 states have (on average 1.390748031496063) internal successors, (2826), 2066 states have internal predecessors, (2826), 431 states have call successors, (431), 142 states have call predecessors, (431), 141 states have return successors, (425), 424 states have call predecessors, (425), 425 states have call successors, (425) [2021-11-16 23:51:56,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 3682 transitions. [2021-11-16 23:51:56,783 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 3682 transitions. Word has length 20 [2021-11-16 23:51:56,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:51:56,783 INFO L470 AbstractCegarLoop]: Abstraction has 2605 states and 3682 transitions. [2021-11-16 23:51:56,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-16 23:51:56,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 3682 transitions. [2021-11-16 23:51:56,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-16 23:51:56,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:51:56,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:51:56,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-16 23:51:56,786 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:51:56,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:51:56,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1526328974, now seen corresponding path program 1 times [2021-11-16 23:51:56,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:51:56,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521685938] [2021-11-16 23:51:56,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:51:56,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:51:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:51:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:51:56,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:51:56,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521685938] [2021-11-16 23:51:56,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521685938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:51:56,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:51:56,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-16 23:51:56,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998684279] [2021-11-16 23:51:56,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:51:56,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 23:51:56,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:51:56,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 23:51:56,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 23:51:56,910 INFO L87 Difference]: Start difference. First operand 2605 states and 3682 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-16 23:51:57,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:51:57,073 INFO L93 Difference]: Finished difference Result 7785 states and 11083 transitions. [2021-11-16 23:51:57,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 23:51:57,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-16 23:51:57,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:51:57,103 INFO L225 Difference]: With dead ends: 7785 [2021-11-16 23:51:57,104 INFO L226 Difference]: Without dead ends: 5183 [2021-11-16 23:51:57,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 23:51:57,120 INFO L933 BasicCegarLoop]: 2140 mSDtfsCounter, 1861 mSDsluCounter, 1859 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1861 SdHoareTripleChecker+Valid, 3999 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:51:57,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1861 Valid, 3999 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 23:51:57,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5183 states. [2021-11-16 23:51:57,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5183 to 5171. [2021-11-16 23:51:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5171 states, 4040 states have (on average 1.391089108910891) internal successors, (5620), 4107 states have internal predecessors, (5620), 850 states have call successors, (850), 282 states have call predecessors, (850), 280 states have return successors, (882), 837 states have call predecessors, (882), 842 states have call successors, (882) [2021-11-16 23:51:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5171 states to 5171 states and 7352 transitions. [2021-11-16 23:51:57,335 INFO L78 Accepts]: Start accepts. Automaton has 5171 states and 7352 transitions. Word has length 21 [2021-11-16 23:51:57,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:51:57,336 INFO L470 AbstractCegarLoop]: Abstraction has 5171 states and 7352 transitions. [2021-11-16 23:51:57,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-16 23:51:57,336 INFO L276 IsEmpty]: Start isEmpty. Operand 5171 states and 7352 transitions. [2021-11-16 23:51:57,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-16 23:51:57,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:51:57,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:51:57,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-16 23:51:57,338 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:51:57,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:51:57,339 INFO L85 PathProgramCache]: Analyzing trace with hash 71082694, now seen corresponding path program 1 times [2021-11-16 23:51:57,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:51:57,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153594174] [2021-11-16 23:51:57,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:51:57,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:51:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:51:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:51:57,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:51:57,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153594174] [2021-11-16 23:51:57,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153594174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:51:57,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:51:57,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-16 23:51:57,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116860037] [2021-11-16 23:51:57,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:51:57,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 23:51:57,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:51:57,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 23:51:57,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 23:51:57,421 INFO L87 Difference]: Start difference. First operand 5171 states and 7352 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-16 23:51:57,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:51:57,526 INFO L93 Difference]: Finished difference Result 5173 states and 7353 transitions. [2021-11-16 23:51:57,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 23:51:57,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-16 23:51:57,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:51:57,550 INFO L225 Difference]: With dead ends: 5173 [2021-11-16 23:51:57,550 INFO L226 Difference]: Without dead ends: 5170 [2021-11-16 23:51:57,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 23:51:57,555 INFO L933 BasicCegarLoop]: 1873 mSDtfsCounter, 1855 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1855 SdHoareTripleChecker+Valid, 1873 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:51:57,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1855 Valid, 1873 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 23:51:57,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5170 states. [2021-11-16 23:51:57,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5170 to 5170. [2021-11-16 23:51:57,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5170 states, 4040 states have (on average 1.3908415841584159) internal successors, (5619), 4106 states have internal predecessors, (5619), 849 states have call successors, (849), 282 states have call predecessors, (849), 280 states have return successors, (882), 837 states have call predecessors, (882), 842 states have call successors, (882) [2021-11-16 23:51:57,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5170 states to 5170 states and 7350 transitions. [2021-11-16 23:51:57,707 INFO L78 Accepts]: Start accepts. Automaton has 5170 states and 7350 transitions. Word has length 22 [2021-11-16 23:51:57,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:51:57,708 INFO L470 AbstractCegarLoop]: Abstraction has 5170 states and 7350 transitions. [2021-11-16 23:51:57,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-16 23:51:57,708 INFO L276 IsEmpty]: Start isEmpty. Operand 5170 states and 7350 transitions. [2021-11-16 23:51:57,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-16 23:51:57,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:51:57,709 INFO L514 BasicCegarLoop]: 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] [2021-11-16 23:51:57,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-16 23:51:57,709 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:51:57,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:51:57,710 INFO L85 PathProgramCache]: Analyzing trace with hash -2091874159, now seen corresponding path program 1 times [2021-11-16 23:51:57,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:51:57,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344922490] [2021-11-16 23:51:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:51:57,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:51:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:51:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:51:57,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:51:57,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344922490] [2021-11-16 23:51:57,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344922490] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:51:57,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:51:57,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-16 23:51:57,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795727363] [2021-11-16 23:51:57,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:51:57,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 23:51:57,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:51:57,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 23:51:57,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 23:51:57,786 INFO L87 Difference]: Start difference. First operand 5170 states and 7350 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-16 23:51:57,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:51:57,935 INFO L93 Difference]: Finished difference Result 5172 states and 7351 transitions. [2021-11-16 23:51:57,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 23:51:57,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-16 23:51:57,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:51:57,965 INFO L225 Difference]: With dead ends: 5172 [2021-11-16 23:51:57,966 INFO L226 Difference]: Without dead ends: 5158 [2021-11-16 23:51:57,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 23:51:57,972 INFO L933 BasicCegarLoop]: 1872 mSDtfsCounter, 1852 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1852 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:51:57,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1852 Valid, 1872 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 23:51:57,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2021-11-16 23:51:58,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 5158. [2021-11-16 23:51:58,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5158 states, 4031 states have (on average 1.3904738278342843) internal successors, (5605), 4095 states have internal predecessors, (5605), 846 states have call successors, (846), 282 states have call predecessors, (846), 280 states have return successors, (880), 836 states have call predecessors, (880), 840 states have call successors, (880) [2021-11-16 23:51:58,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5158 states to 5158 states and 7331 transitions. [2021-11-16 23:51:58,143 INFO L78 Accepts]: Start accepts. Automaton has 5158 states and 7331 transitions. Word has length 23 [2021-11-16 23:51:58,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:51:58,144 INFO L470 AbstractCegarLoop]: Abstraction has 5158 states and 7331 transitions. [2021-11-16 23:51:58,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-16 23:51:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 5158 states and 7331 transitions. [2021-11-16 23:51:58,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-16 23:51:58,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:51:58,149 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:51:58,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-16 23:51:58,151 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:51:58,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:51:58,152 INFO L85 PathProgramCache]: Analyzing trace with hash -95947495, now seen corresponding path program 1 times [2021-11-16 23:51:58,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:51:58,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505542447] [2021-11-16 23:51:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:51:58,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:51:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:51:58,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 23:51:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:51:58,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 23:51:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:51:58,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-16 23:51:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:51:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-16 23:51:58,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:51:58,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505542447] [2021-11-16 23:51:58,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505542447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:51:58,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:51:58,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 23:51:58,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828975491] [2021-11-16 23:51:58,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:51:58,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 23:51:58,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:51:58,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 23:51:58,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-16 23:51:58,314 INFO L87 Difference]: Start difference. First operand 5158 states and 7331 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-16 23:52:01,700 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:52:05,450 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:52:08,311 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:52:10,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:52:10,959 INFO L93 Difference]: Finished difference Result 10824 states and 15496 transitions. [2021-11-16 23:52:10,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 23:52:10,968 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2021-11-16 23:52:10,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:52:11,011 INFO L225 Difference]: With dead ends: 10824 [2021-11-16 23:52:11,011 INFO L226 Difference]: Without dead ends: 5669 [2021-11-16 23:52:11,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-16 23:52:11,035 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 2569 mSDsluCounter, 2922 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 971 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2719 SdHoareTripleChecker+Valid, 4626 SdHoareTripleChecker+Invalid, 2464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 971 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-11-16 23:52:11,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2719 Valid, 4626 Invalid, 2464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [971 Valid, 1490 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2021-11-16 23:52:11,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5669 states. [2021-11-16 23:52:11,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5669 to 5168. [2021-11-16 23:52:11,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5168 states, 4039 states have (on average 1.3892052488239663) internal successors, (5611), 4107 states have internal predecessors, (5611), 840 states have call successors, (840), 282 states have call predecessors, (840), 288 states have return successors, (886), 830 states have call predecessors, (886), 834 states have call successors, (886) [2021-11-16 23:52:11,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5168 states to 5168 states and 7337 transitions. [2021-11-16 23:52:11,221 INFO L78 Accepts]: Start accepts. Automaton has 5168 states and 7337 transitions. Word has length 48 [2021-11-16 23:52:11,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:52:11,223 INFO L470 AbstractCegarLoop]: Abstraction has 5168 states and 7337 transitions. [2021-11-16 23:52:11,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-16 23:52:11,223 INFO L276 IsEmpty]: Start isEmpty. Operand 5168 states and 7337 transitions. [2021-11-16 23:52:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-16 23:52:11,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:52:11,228 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-16 23:52:11,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-16 23:52:11,228 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:52:11,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:52:11,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1585769932, now seen corresponding path program 1 times [2021-11-16 23:52:11,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:52:11,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193558734] [2021-11-16 23:52:11,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:52:11,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:52:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:11,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 23:52:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:11,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-16 23:52:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:11,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 23:52:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:11,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-16 23:52:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-16 23:52:11,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:52:11,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193558734] [2021-11-16 23:52:11,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193558734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:52:11,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:52:11,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 23:52:11,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110748909] [2021-11-16 23:52:11,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:52:11,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 23:52:11,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:52:11,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 23:52:11,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-16 23:52:11,424 INFO L87 Difference]: Start difference. First operand 5168 states and 7337 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-16 23:52:15,034 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:52:18,431 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:52:19,666 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:52:21,676 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:52:24,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:52:24,712 INFO L93 Difference]: Finished difference Result 11328 states and 16424 transitions. [2021-11-16 23:52:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 23:52:24,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 61 [2021-11-16 23:52:24,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:52:24,736 INFO L225 Difference]: With dead ends: 11328 [2021-11-16 23:52:24,737 INFO L226 Difference]: Without dead ends: 6163 [2021-11-16 23:52:24,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-11-16 23:52:24,754 INFO L933 BasicCegarLoop]: 1655 mSDtfsCounter, 3104 mSDsluCounter, 4159 mSDsCounter, 0 mSdLazyCounter, 2188 mSolverCounterSat, 1415 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3207 SdHoareTripleChecker+Valid, 5814 SdHoareTripleChecker+Invalid, 3606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1415 IncrementalHoareTripleChecker+Valid, 2188 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:52:24,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3207 Valid, 5814 Invalid, 3606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1415 Valid, 2188 Invalid, 3 Unknown, 0 Unchecked, 13.0s Time] [2021-11-16 23:52:24,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6163 states. [2021-11-16 23:52:24,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6163 to 4866. [2021-11-16 23:52:24,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4866 states, 3821 states have (on average 1.3904736979848207) internal successors, (5313), 3889 states have internal predecessors, (5313), 758 states have call successors, (758), 280 states have call predecessors, (758), 286 states have return successors, (804), 748 states have call predecessors, (804), 752 states have call successors, (804) [2021-11-16 23:52:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4866 states to 4866 states and 6875 transitions. [2021-11-16 23:52:24,913 INFO L78 Accepts]: Start accepts. Automaton has 4866 states and 6875 transitions. Word has length 61 [2021-11-16 23:52:24,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:52:24,914 INFO L470 AbstractCegarLoop]: Abstraction has 4866 states and 6875 transitions. [2021-11-16 23:52:24,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-16 23:52:24,914 INFO L276 IsEmpty]: Start isEmpty. Operand 4866 states and 6875 transitions. [2021-11-16 23:52:24,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-16 23:52:24,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:52:24,917 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-16 23:52:24,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-16 23:52:24,917 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:52:24,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:52:24,918 INFO L85 PathProgramCache]: Analyzing trace with hash 43225383, now seen corresponding path program 1 times [2021-11-16 23:52:24,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:52:24,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792470709] [2021-11-16 23:52:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:52:24,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:52:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:25,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-16 23:52:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:25,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 23:52:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:25,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 23:52:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:25,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 23:52:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-16 23:52:25,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:52:25,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792470709] [2021-11-16 23:52:25,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792470709] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:52:25,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:52:25,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 23:52:25,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323260348] [2021-11-16 23:52:25,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:52:25,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 23:52:25,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:52:25,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 23:52:25,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-16 23:52:25,066 INFO L87 Difference]: Start difference. First operand 4866 states and 6875 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-16 23:52:28,311 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:52:33,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:52:33,945 INFO L93 Difference]: Finished difference Result 10616 states and 15420 transitions. [2021-11-16 23:52:33,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 23:52:33,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 65 [2021-11-16 23:52:33,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:52:33,967 INFO L225 Difference]: With dead ends: 10616 [2021-11-16 23:52:33,968 INFO L226 Difference]: Without dead ends: 5753 [2021-11-16 23:52:33,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-16 23:52:33,988 INFO L933 BasicCegarLoop]: 1462 mSDtfsCounter, 1519 mSDsluCounter, 2482 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 947 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1590 SdHoareTripleChecker+Valid, 3944 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 947 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-16 23:52:33,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1590 Valid, 3944 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [947 Valid, 1499 Invalid, 1 Unknown, 0 Unchecked, 8.6s Time] [2021-11-16 23:52:33,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5753 states. [2021-11-16 23:52:34,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5753 to 4870. [2021-11-16 23:52:34,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4870 states, 3825 states have (on average 1.3900653594771242) internal successors, (5317), 3893 states have internal predecessors, (5317), 758 states have call successors, (758), 280 states have call predecessors, (758), 286 states have return successors, (804), 748 states have call predecessors, (804), 752 states have call successors, (804) [2021-11-16 23:52:34,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4870 states to 4870 states and 6879 transitions. [2021-11-16 23:52:34,141 INFO L78 Accepts]: Start accepts. Automaton has 4870 states and 6879 transitions. Word has length 65 [2021-11-16 23:52:34,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:52:34,143 INFO L470 AbstractCegarLoop]: Abstraction has 4870 states and 6879 transitions. [2021-11-16 23:52:34,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-16 23:52:34,143 INFO L276 IsEmpty]: Start isEmpty. Operand 4870 states and 6879 transitions. [2021-11-16 23:52:34,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-16 23:52:34,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:52:34,147 INFO L514 BasicCegarLoop]: 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] [2021-11-16 23:52:34,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-16 23:52:34,147 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:52:34,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:52:34,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1654589314, now seen corresponding path program 1 times [2021-11-16 23:52:34,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:52:34,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349884837] [2021-11-16 23:52:34,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:52:34,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:52:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:34,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 23:52:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:34,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:52:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:34,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-16 23:52:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:34,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 23:52:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:34,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 23:52:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:34,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 23:52:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:52:34,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:52:34,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349884837] [2021-11-16 23:52:34,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349884837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:52:34,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:52:34,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-16 23:52:34,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969224448] [2021-11-16 23:52:34,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:52:34,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 23:52:34,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:52:34,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 23:52:34,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 23:52:34,308 INFO L87 Difference]: Start difference. First operand 4870 states and 6879 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-16 23:52:37,593 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:52:39,620 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:52:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:52:41,240 INFO L93 Difference]: Finished difference Result 11366 states and 16147 transitions. [2021-11-16 23:52:41,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 23:52:41,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2021-11-16 23:52:41,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:52:41,261 INFO L225 Difference]: With dead ends: 11366 [2021-11-16 23:52:41,262 INFO L226 Difference]: Without dead ends: 6499 [2021-11-16 23:52:41,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-16 23:52:41,280 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 2335 mSDsluCounter, 1874 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 698 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2471 SdHoareTripleChecker+Valid, 3500 SdHoareTripleChecker+Invalid, 2087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 698 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-16 23:52:41,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2471 Valid, 3500 Invalid, 2087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [698 Valid, 1387 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2021-11-16 23:52:41,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6499 states. [2021-11-16 23:52:41,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6499 to 6156. [2021-11-16 23:52:41,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6156 states, 4883 states have (on average 1.4026213393405693) internal successors, (6849), 4967 states have internal predecessors, (6849), 902 states have call successors, (902), 356 states have call predecessors, (902), 370 states have return successors, (972), 904 states have call predecessors, (972), 896 states have call successors, (972) [2021-11-16 23:52:41,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6156 states to 6156 states and 8723 transitions. [2021-11-16 23:52:41,463 INFO L78 Accepts]: Start accepts. Automaton has 6156 states and 8723 transitions. Word has length 76 [2021-11-16 23:52:41,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:52:41,463 INFO L470 AbstractCegarLoop]: Abstraction has 6156 states and 8723 transitions. [2021-11-16 23:52:41,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-16 23:52:41,464 INFO L276 IsEmpty]: Start isEmpty. Operand 6156 states and 8723 transitions. [2021-11-16 23:52:41,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-16 23:52:41,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:52:41,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:52:41,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-16 23:52:41,469 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:52:41,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:52:41,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1247655667, now seen corresponding path program 1 times [2021-11-16 23:52:41,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:52:41,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041042790] [2021-11-16 23:52:41,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:52:41,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:52:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:41,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:52:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:41,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:52:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:41,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 23:52:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:41,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-16 23:52:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:41,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-16 23:52:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:41,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-16 23:52:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:52:41,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:52:41,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041042790] [2021-11-16 23:52:41,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041042790] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 23:52:41,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495534001] [2021-11-16 23:52:41,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:52:41,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 23:52:41,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 23:52:41,740 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 23:52:41,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-16 23:52:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:42,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1627 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-16 23:52:42,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 23:52:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 23:52:42,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 23:52:42,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495534001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:52:42,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 23:52:42,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-16 23:52:42,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308815065] [2021-11-16 23:52:42,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:52:42,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 23:52:42,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:52:42,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 23:52:42,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-16 23:52:42,362 INFO L87 Difference]: Start difference. First operand 6156 states and 8723 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-16 23:52:42,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:52:42,631 INFO L93 Difference]: Finished difference Result 17250 states and 24425 transitions. [2021-11-16 23:52:42,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 23:52:42,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 89 [2021-11-16 23:52:42,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:52:42,668 INFO L225 Difference]: With dead ends: 17250 [2021-11-16 23:52:42,668 INFO L226 Difference]: Without dead ends: 11097 [2021-11-16 23:52:42,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-16 23:52:42,687 INFO L933 BasicCegarLoop]: 2506 mSDtfsCounter, 1610 mSDsluCounter, 1606 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 4112 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:52:42,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1610 Valid, 4112 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 23:52:42,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11097 states. [2021-11-16 23:52:43,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11097 to 11078. [2021-11-16 23:52:43,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11078 states, 8729 states have (on average 1.3954633978691717) internal successors, (12181), 8877 states have internal predecessors, (12181), 1684 states have call successors, (1684), 634 states have call predecessors, (1684), 664 states have return successors, (1814), 1692 states have call predecessors, (1814), 1678 states have call successors, (1814) [2021-11-16 23:52:43,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11078 states to 11078 states and 15679 transitions. [2021-11-16 23:52:43,088 INFO L78 Accepts]: Start accepts. Automaton has 11078 states and 15679 transitions. Word has length 89 [2021-11-16 23:52:43,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:52:43,088 INFO L470 AbstractCegarLoop]: Abstraction has 11078 states and 15679 transitions. [2021-11-16 23:52:43,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-16 23:52:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 11078 states and 15679 transitions. [2021-11-16 23:52:43,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-16 23:52:43,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:52:43,093 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:52:43,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-16 23:52:43,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-16 23:52:43,314 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:52:43,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:52:43,315 INFO L85 PathProgramCache]: Analyzing trace with hash 482330957, now seen corresponding path program 1 times [2021-11-16 23:52:43,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:52:43,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726292068] [2021-11-16 23:52:43,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:52:43,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:52:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:43,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-16 23:52:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:43,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 23:52:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:43,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 23:52:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:43,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-16 23:52:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:43,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 23:52:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:43,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 23:52:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:43,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:52:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-16 23:52:43,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:52:43,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726292068] [2021-11-16 23:52:43,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726292068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:52:43,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:52:43,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 23:52:43,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128388775] [2021-11-16 23:52:43,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:52:43,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 23:52:43,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:52:43,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 23:52:43,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-16 23:52:43,507 INFO L87 Difference]: Start difference. First operand 11078 states and 15679 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 23:52:48,219 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:52:50,242 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:52:52,813 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:52:55,890 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:52:59,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:52:59,071 INFO L93 Difference]: Finished difference Result 12859 states and 18579 transitions. [2021-11-16 23:52:59,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 23:52:59,072 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2021-11-16 23:52:59,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:52:59,125 INFO L225 Difference]: With dead ends: 12859 [2021-11-16 23:52:59,125 INFO L226 Difference]: Without dead ends: 12856 [2021-11-16 23:52:59,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-16 23:52:59,136 INFO L933 BasicCegarLoop]: 1525 mSDtfsCounter, 1660 mSDsluCounter, 2458 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 718 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1746 SdHoareTripleChecker+Valid, 3983 SdHoareTripleChecker+Invalid, 2833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 718 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2021-11-16 23:52:59,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1746 Valid, 3983 Invalid, 2833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [718 Valid, 2112 Invalid, 3 Unknown, 0 Unchecked, 15.2s Time] [2021-11-16 23:52:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12856 states. [2021-11-16 23:52:59,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12856 to 11077. [2021-11-16 23:52:59,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11077 states, 8729 states have (on average 1.3943177912704776) internal successors, (12171), 8876 states have internal predecessors, (12171), 1683 states have call successors, (1683), 634 states have call predecessors, (1683), 664 states have return successors, (1814), 1692 states have call predecessors, (1814), 1678 states have call successors, (1814) [2021-11-16 23:52:59,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11077 states to 11077 states and 15668 transitions. [2021-11-16 23:52:59,522 INFO L78 Accepts]: Start accepts. Automaton has 11077 states and 15668 transitions. Word has length 87 [2021-11-16 23:52:59,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:52:59,523 INFO L470 AbstractCegarLoop]: Abstraction has 11077 states and 15668 transitions. [2021-11-16 23:52:59,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-16 23:52:59,523 INFO L276 IsEmpty]: Start isEmpty. Operand 11077 states and 15668 transitions. [2021-11-16 23:52:59,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-16 23:52:59,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:52:59,531 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:52:59,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-16 23:52:59,532 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:52:59,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:52:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash 455244955, now seen corresponding path program 1 times [2021-11-16 23:52:59,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:52:59,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312815798] [2021-11-16 23:52:59,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:52:59,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:52:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:59,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 23:52:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:59,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:52:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:59,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:52:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:59,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:52:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:59,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 23:52:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:59,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:52:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:59,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 23:52:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:59,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-16 23:52:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:59,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 23:52:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:59,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-16 23:52:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:52:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-16 23:52:59,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:52:59,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312815798] [2021-11-16 23:52:59,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312815798] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:52:59,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:52:59,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 23:52:59,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011329263] [2021-11-16 23:52:59,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:52:59,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 23:52:59,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:52:59,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 23:52:59,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-16 23:52:59,759 INFO L87 Difference]: Start difference. First operand 11077 states and 15668 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-16 23:53:03,321 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:05,353 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:07,378 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:10,491 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:12,137 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:14,329 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:16,429 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:18,443 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:21,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:53:21,101 INFO L93 Difference]: Finished difference Result 23573 states and 33693 transitions. [2021-11-16 23:53:21,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 23:53:21,101 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 120 [2021-11-16 23:53:21,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:53:21,158 INFO L225 Difference]: With dead ends: 23573 [2021-11-16 23:53:21,158 INFO L226 Difference]: Without dead ends: 12499 [2021-11-16 23:53:21,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-16 23:53:21,193 INFO L933 BasicCegarLoop]: 1459 mSDtfsCounter, 1781 mSDsluCounter, 2919 mSDsCounter, 0 mSdLazyCounter, 2476 mSolverCounterSat, 651 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1923 SdHoareTripleChecker+Valid, 4378 SdHoareTripleChecker+Invalid, 3133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2476 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2021-11-16 23:53:21,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1923 Valid, 4378 Invalid, 3133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2476 Invalid, 6 Unknown, 0 Unchecked, 20.9s Time] [2021-11-16 23:53:21,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12499 states. [2021-11-16 23:53:21,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12499 to 11173. [2021-11-16 23:53:21,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11173 states, 8809 states have (on average 1.3934612328300602) internal successors, (12275), 8956 states have internal predecessors, (12275), 1699 states have call successors, (1699), 634 states have call predecessors, (1699), 664 states have return successors, (1838), 1708 states have call predecessors, (1838), 1694 states have call successors, (1838) [2021-11-16 23:53:21,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11173 states to 11173 states and 15812 transitions. [2021-11-16 23:53:21,622 INFO L78 Accepts]: Start accepts. Automaton has 11173 states and 15812 transitions. Word has length 120 [2021-11-16 23:53:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:53:21,623 INFO L470 AbstractCegarLoop]: Abstraction has 11173 states and 15812 transitions. [2021-11-16 23:53:21,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-16 23:53:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 11173 states and 15812 transitions. [2021-11-16 23:53:21,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-16 23:53:21,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:53:21,630 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:53:21,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-16 23:53:21,630 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:53:21,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:53:21,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1788738343, now seen corresponding path program 1 times [2021-11-16 23:53:21,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:53:21,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172323975] [2021-11-16 23:53:21,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:53:21,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:53:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:21,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 23:53:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:21,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:53:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:21,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:53:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:21,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:53:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:21,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 23:53:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:21,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:53:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:21,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 23:53:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:21,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-16 23:53:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:21,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 23:53:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:21,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-16 23:53:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-16 23:53:21,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:53:21,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172323975] [2021-11-16 23:53:21,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172323975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:53:21,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:53:21,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 23:53:21,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476295518] [2021-11-16 23:53:21,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:53:21,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 23:53:21,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:53:21,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 23:53:21,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-16 23:53:21,810 INFO L87 Difference]: Start difference. First operand 11173 states and 15812 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-16 23:53:25,380 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:27,415 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:29,443 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:32,758 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:34,778 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:36,804 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:39,343 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:41,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:53:41,219 INFO L93 Difference]: Finished difference Result 23239 states and 33139 transitions. [2021-11-16 23:53:41,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 23:53:41,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 120 [2021-11-16 23:53:41,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:53:41,265 INFO L225 Difference]: With dead ends: 23239 [2021-11-16 23:53:41,265 INFO L226 Difference]: Without dead ends: 12069 [2021-11-16 23:53:41,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-16 23:53:41,298 INFO L933 BasicCegarLoop]: 1445 mSDtfsCounter, 1452 mSDsluCounter, 2390 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 368 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 3835 SdHoareTripleChecker+Invalid, 2349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:53:41,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1589 Valid, 3835 Invalid, 2349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 1975 Invalid, 6 Unknown, 0 Unchecked, 19.0s Time] [2021-11-16 23:53:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12069 states. [2021-11-16 23:53:41,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12069 to 11181. [2021-11-16 23:53:41,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11181 states, 8817 states have (on average 1.3931042304638765) internal successors, (12283), 8964 states have internal predecessors, (12283), 1699 states have call successors, (1699), 634 states have call predecessors, (1699), 664 states have return successors, (1838), 1708 states have call predecessors, (1838), 1694 states have call successors, (1838) [2021-11-16 23:53:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11181 states to 11181 states and 15820 transitions. [2021-11-16 23:53:41,708 INFO L78 Accepts]: Start accepts. Automaton has 11181 states and 15820 transitions. Word has length 120 [2021-11-16 23:53:41,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:53:41,709 INFO L470 AbstractCegarLoop]: Abstraction has 11181 states and 15820 transitions. [2021-11-16 23:53:41,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-16 23:53:41,709 INFO L276 IsEmpty]: Start isEmpty. Operand 11181 states and 15820 transitions. [2021-11-16 23:53:41,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-16 23:53:41,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:53:41,720 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:53:41,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-16 23:53:41,720 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:53:41,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:53:41,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1919352628, now seen corresponding path program 1 times [2021-11-16 23:53:41,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:53:41,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011193809] [2021-11-16 23:53:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:53:41,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:53:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:41,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 23:53:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:41,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:53:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:41,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:53:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:41,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:53:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:41,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 23:53:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:41,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:53:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:41,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 23:53:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:41,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-16 23:53:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:41,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 23:53:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-16 23:53:41,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:53:41,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011193809] [2021-11-16 23:53:41,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011193809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:53:41,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:53:41,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 23:53:41,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970929537] [2021-11-16 23:53:41,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:53:41,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 23:53:41,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:53:41,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 23:53:41,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-16 23:53:41,882 INFO L87 Difference]: Start difference. First operand 11181 states and 15820 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-16 23:53:45,560 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:47,604 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:49,635 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:53,306 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:55,327 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:56,601 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:53:58,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:53:58,839 INFO L93 Difference]: Finished difference Result 23515 states and 33595 transitions. [2021-11-16 23:53:58,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 23:53:58,839 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 122 [2021-11-16 23:53:58,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:53:58,885 INFO L225 Difference]: With dead ends: 23515 [2021-11-16 23:53:58,885 INFO L226 Difference]: Without dead ends: 12337 [2021-11-16 23:53:58,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-16 23:53:58,918 INFO L933 BasicCegarLoop]: 1517 mSDtfsCounter, 1787 mSDsluCounter, 2270 mSDsCounter, 0 mSdLazyCounter, 1994 mSolverCounterSat, 682 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1938 SdHoareTripleChecker+Valid, 3787 SdHoareTripleChecker+Invalid, 2681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 682 IncrementalHoareTripleChecker+Valid, 1994 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2021-11-16 23:53:58,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1938 Valid, 3787 Invalid, 2681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [682 Valid, 1994 Invalid, 5 Unknown, 0 Unchecked, 16.5s Time] [2021-11-16 23:53:58,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12337 states. [2021-11-16 23:53:59,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12337 to 11234. [2021-11-16 23:53:59,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11234 states, 8870 states have (on average 1.3898534385569334) internal successors, (12328), 9017 states have internal predecessors, (12328), 1699 states have call successors, (1699), 634 states have call predecessors, (1699), 664 states have return successors, (1838), 1708 states have call predecessors, (1838), 1694 states have call successors, (1838) [2021-11-16 23:53:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11234 states to 11234 states and 15865 transitions. [2021-11-16 23:53:59,326 INFO L78 Accepts]: Start accepts. Automaton has 11234 states and 15865 transitions. Word has length 122 [2021-11-16 23:53:59,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:53:59,327 INFO L470 AbstractCegarLoop]: Abstraction has 11234 states and 15865 transitions. [2021-11-16 23:53:59,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-16 23:53:59,327 INFO L276 IsEmpty]: Start isEmpty. Operand 11234 states and 15865 transitions. [2021-11-16 23:53:59,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-16 23:53:59,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:53:59,335 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:53:59,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-16 23:53:59,336 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:53:59,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:53:59,336 INFO L85 PathProgramCache]: Analyzing trace with hash 208567492, now seen corresponding path program 1 times [2021-11-16 23:53:59,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:53:59,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660060614] [2021-11-16 23:53:59,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:53:59,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:53:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:59,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 23:53:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:59,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:53:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:59,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:53:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:59,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:53:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:59,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 23:53:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:59,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:53:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:59,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 23:53:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:59,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-16 23:53:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:59,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 23:53:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:53:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-16 23:53:59,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:53:59,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660060614] [2021-11-16 23:53:59,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660060614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:53:59,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:53:59,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-16 23:53:59,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913100637] [2021-11-16 23:53:59,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:53:59,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 23:53:59,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:53:59,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 23:53:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-16 23:53:59,519 INFO L87 Difference]: Start difference. First operand 11234 states and 15865 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-16 23:54:03,721 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:54:05,765 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:54:07,806 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:54:09,836 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:54:13,383 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:54:16,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:54:16,312 INFO L93 Difference]: Finished difference Result 23336 states and 33113 transitions. [2021-11-16 23:54:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 23:54:16,312 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 122 [2021-11-16 23:54:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:54:16,355 INFO L225 Difference]: With dead ends: 23336 [2021-11-16 23:54:16,355 INFO L226 Difference]: Without dead ends: 12093 [2021-11-16 23:54:16,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-16 23:54:16,384 INFO L933 BasicCegarLoop]: 1450 mSDtfsCounter, 1450 mSDsluCounter, 3415 mSDsCounter, 0 mSdLazyCounter, 2631 mSolverCounterSat, 367 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 4865 SdHoareTripleChecker+Invalid, 3002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 2631 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2021-11-16 23:54:16,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1586 Valid, 4865 Invalid, 3002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 2631 Invalid, 4 Unknown, 0 Unchecked, 16.3s Time] [2021-11-16 23:54:16,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12093 states. [2021-11-16 23:54:16,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12093 to 11236. [2021-11-16 23:54:16,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11236 states, 8872 states have (on average 1.3890892696122632) internal successors, (12324), 9019 states have internal predecessors, (12324), 1699 states have call successors, (1699), 634 states have call predecessors, (1699), 664 states have return successors, (1838), 1708 states have call predecessors, (1838), 1694 states have call successors, (1838) [2021-11-16 23:54:16,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11236 states to 11236 states and 15861 transitions. [2021-11-16 23:54:16,798 INFO L78 Accepts]: Start accepts. Automaton has 11236 states and 15861 transitions. Word has length 122 [2021-11-16 23:54:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:54:16,799 INFO L470 AbstractCegarLoop]: Abstraction has 11236 states and 15861 transitions. [2021-11-16 23:54:16,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-16 23:54:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 11236 states and 15861 transitions. [2021-11-16 23:54:16,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-16 23:54:16,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:54:16,808 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:54:16,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-16 23:54:16,808 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:54:16,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:54:16,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1843452540, now seen corresponding path program 1 times [2021-11-16 23:54:16,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:54:16,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984605498] [2021-11-16 23:54:16,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:54:16,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:54:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:54:16,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:54:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:54:16,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:54:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:54:16,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:54:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:54:16,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:54:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:54:16,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 23:54:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:54:16,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:54:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:54:16,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 23:54:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:54:16,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-16 23:54:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:54:17,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-16 23:54:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:54:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-16 23:54:17,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:54:17,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984605498] [2021-11-16 23:54:17,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984605498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:54:17,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:54:17,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 23:54:17,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793952238] [2021-11-16 23:54:17,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:54:17,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 23:54:17,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:54:17,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 23:54:17,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-16 23:54:17,014 INFO L87 Difference]: Start difference. First operand 11236 states and 15861 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-16 23:54:21,506 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:54:23,530 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:54:25,566 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:54:27,601 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:54:29,622 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:54:34,109 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:54:36,146 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:54:38,181 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:54:40,211 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:54:44,611 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:54:46,781 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:54:53,010 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:54:54,458 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:54:56,475 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:54:58,506 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:00,265 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:01,704 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:03,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:55:03,367 INFO L93 Difference]: Finished difference Result 29996 states and 42579 transitions. [2021-11-16 23:55:03,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-16 23:55:03,368 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 125 [2021-11-16 23:55:03,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:55:03,432 INFO L225 Difference]: With dead ends: 29996 [2021-11-16 23:55:03,432 INFO L226 Difference]: Without dead ends: 18763 [2021-11-16 23:55:03,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-11-16 23:55:03,459 INFO L933 BasicCegarLoop]: 2878 mSDtfsCounter, 2873 mSDsluCounter, 7808 mSDsCounter, 0 mSdLazyCounter, 5877 mSolverCounterSat, 1001 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3076 SdHoareTripleChecker+Valid, 10686 SdHoareTripleChecker+Invalid, 6891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1001 IncrementalHoareTripleChecker+Valid, 5877 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.5s IncrementalHoareTripleChecker+Time [2021-11-16 23:55:03,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3076 Valid, 10686 Invalid, 6891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1001 Valid, 5877 Invalid, 13 Unknown, 0 Unchecked, 45.5s Time] [2021-11-16 23:55:03,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18763 states. [2021-11-16 23:55:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18763 to 11252. [2021-11-16 23:55:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11252 states, 8884 states have (on average 1.3885637100405224) internal successors, (12336), 9031 states have internal predecessors, (12336), 1699 states have call successors, (1699), 634 states have call predecessors, (1699), 668 states have return successors, (1846), 1712 states have call predecessors, (1846), 1694 states have call successors, (1846) [2021-11-16 23:55:03,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11252 states to 11252 states and 15881 transitions. [2021-11-16 23:55:03,918 INFO L78 Accepts]: Start accepts. Automaton has 11252 states and 15881 transitions. Word has length 125 [2021-11-16 23:55:03,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:55:03,919 INFO L470 AbstractCegarLoop]: Abstraction has 11252 states and 15881 transitions. [2021-11-16 23:55:03,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-16 23:55:03,919 INFO L276 IsEmpty]: Start isEmpty. Operand 11252 states and 15881 transitions. [2021-11-16 23:55:03,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-16 23:55:03,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:55:03,927 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:55:03,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-16 23:55:03,927 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:55:03,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:55:03,927 INFO L85 PathProgramCache]: Analyzing trace with hash 2101997227, now seen corresponding path program 1 times [2021-11-16 23:55:03,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:55:03,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562497809] [2021-11-16 23:55:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:55:03,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:55:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:04,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:55:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:04,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:55:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:04,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:55:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:04,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:55:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:04,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 23:55:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:04,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:55:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:04,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 23:55:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:04,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:55:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:04,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:55:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:04,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 23:55:04,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:04,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-16 23:55:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:04,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:55:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:04,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-16 23:55:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:04,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-16 23:55:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:04,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-16 23:55:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-16 23:55:04,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:55:04,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562497809] [2021-11-16 23:55:04,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562497809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:55:04,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:55:04,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 23:55:04,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820164296] [2021-11-16 23:55:04,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:55:04,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 23:55:04,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:55:04,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 23:55:04,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-16 23:55:04,179 INFO L87 Difference]: Start difference. First operand 11252 states and 15881 transitions. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (18), 6 states have call predecessors, (18), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 23:55:08,451 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:10,487 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:12,523 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:14,560 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:18,109 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:19,455 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:23,490 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:25,512 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:27,371 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:29,305 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:30,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:55:30,720 INFO L93 Difference]: Finished difference Result 23973 states and 34351 transitions. [2021-11-16 23:55:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 23:55:30,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (18), 6 states have call predecessors, (18), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 171 [2021-11-16 23:55:30,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:55:30,755 INFO L225 Difference]: With dead ends: 23973 [2021-11-16 23:55:30,755 INFO L226 Difference]: Without dead ends: 12724 [2021-11-16 23:55:30,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-16 23:55:30,776 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 2100 mSDsluCounter, 3703 mSDsCounter, 0 mSdLazyCounter, 2628 mSolverCounterSat, 947 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2242 SdHoareTripleChecker+Valid, 5209 SdHoareTripleChecker+Invalid, 3582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 947 IncrementalHoareTripleChecker+Valid, 2628 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.9s IncrementalHoareTripleChecker+Time [2021-11-16 23:55:30,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2242 Valid, 5209 Invalid, 3582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [947 Valid, 2628 Invalid, 7 Unknown, 0 Unchecked, 25.9s Time] [2021-11-16 23:55:30,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12724 states. [2021-11-16 23:55:31,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12724 to 11268. [2021-11-16 23:55:31,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11268 states, 8900 states have (on average 1.3878651685393257) internal successors, (12352), 9047 states have internal predecessors, (12352), 1699 states have call successors, (1699), 634 states have call predecessors, (1699), 668 states have return successors, (1846), 1712 states have call predecessors, (1846), 1694 states have call successors, (1846) [2021-11-16 23:55:31,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11268 states to 11268 states and 15897 transitions. [2021-11-16 23:55:31,169 INFO L78 Accepts]: Start accepts. Automaton has 11268 states and 15897 transitions. Word has length 171 [2021-11-16 23:55:31,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:55:31,169 INFO L470 AbstractCegarLoop]: Abstraction has 11268 states and 15897 transitions. [2021-11-16 23:55:31,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (18), 6 states have call predecessors, (18), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 23:55:31,170 INFO L276 IsEmpty]: Start isEmpty. Operand 11268 states and 15897 transitions. [2021-11-16 23:55:31,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-16 23:55:31,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:55:31,177 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:55:31,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-16 23:55:31,178 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:55:31,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:55:31,178 INFO L85 PathProgramCache]: Analyzing trace with hash 786119707, now seen corresponding path program 1 times [2021-11-16 23:55:31,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:55:31,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668894242] [2021-11-16 23:55:31,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:55:31,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:55:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:31,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:55:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:31,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:55:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:31,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:55:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:31,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:55:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:31,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 23:55:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:31,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:55:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:31,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 23:55:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:31,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:55:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:31,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:55:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:31,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-16 23:55:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:31,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-16 23:55:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:31,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:55:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:31,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-11-16 23:55:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:31,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-16 23:55:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:31,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-16 23:55:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:55:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-16 23:55:31,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:55:31,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668894242] [2021-11-16 23:55:31,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668894242] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:55:31,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:55:31,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-16 23:55:31,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264245528] [2021-11-16 23:55:31,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:55:31,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 23:55:31,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:55:31,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 23:55:31,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-16 23:55:31,523 INFO L87 Difference]: Start difference. First operand 11268 states and 15897 transitions. Second operand has 11 states, 11 states have (on average 11.090909090909092) internal successors, (122), 6 states have internal predecessors, (122), 3 states have call successors, (18), 6 states have call predecessors, (18), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-16 23:55:36,673 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:38,707 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:40,751 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:42,785 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:44,828 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:46,852 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:51,643 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:53,672 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:55:58,462 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:00,698 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:06,944 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:09,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:56:09,567 INFO L93 Difference]: Finished difference Result 30128 states and 43035 transitions. [2021-11-16 23:56:09,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-16 23:56:09,568 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.090909090909092) internal successors, (122), 6 states have internal predecessors, (122), 3 states have call successors, (18), 6 states have call predecessors, (18), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 174 [2021-11-16 23:56:09,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:56:09,628 INFO L225 Difference]: With dead ends: 30128 [2021-11-16 23:56:09,628 INFO L226 Difference]: Without dead ends: 18863 [2021-11-16 23:56:09,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-11-16 23:56:09,654 INFO L933 BasicCegarLoop]: 2874 mSDtfsCounter, 3509 mSDsluCounter, 11169 mSDsCounter, 0 mSdLazyCounter, 7573 mSolverCounterSat, 1369 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3713 SdHoareTripleChecker+Valid, 14043 SdHoareTripleChecker+Invalid, 8951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1369 IncrementalHoareTripleChecker+Valid, 7573 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.9s IncrementalHoareTripleChecker+Time [2021-11-16 23:56:09,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3713 Valid, 14043 Invalid, 8951 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1369 Valid, 7573 Invalid, 9 Unknown, 0 Unchecked, 36.9s Time] [2021-11-16 23:56:09,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18863 states. [2021-11-16 23:56:10,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18863 to 17512. [2021-11-16 23:56:10,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17512 states, 13866 states have (on average 1.3897302754940142) internal successors, (19270), 14105 states have internal predecessors, (19270), 2603 states have call successors, (2603), 988 states have call predecessors, (2603), 1042 states have return successors, (2862), 2616 states have call predecessors, (2862), 2598 states have call successors, (2862) [2021-11-16 23:56:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17512 states to 17512 states and 24735 transitions. [2021-11-16 23:56:10,310 INFO L78 Accepts]: Start accepts. Automaton has 17512 states and 24735 transitions. Word has length 174 [2021-11-16 23:56:10,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:56:10,310 INFO L470 AbstractCegarLoop]: Abstraction has 17512 states and 24735 transitions. [2021-11-16 23:56:10,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.090909090909092) internal successors, (122), 6 states have internal predecessors, (122), 3 states have call successors, (18), 6 states have call predecessors, (18), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-16 23:56:10,311 INFO L276 IsEmpty]: Start isEmpty. Operand 17512 states and 24735 transitions. [2021-11-16 23:56:10,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-16 23:56:10,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:56:10,326 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:56:10,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-16 23:56:10,327 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:56:10,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:56:10,327 INFO L85 PathProgramCache]: Analyzing trace with hash -356933797, now seen corresponding path program 1 times [2021-11-16 23:56:10,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:56:10,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915772305] [2021-11-16 23:56:10,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:56:10,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:56:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:56:10,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:56:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:56:10,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:56:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:56:10,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:56:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:56:10,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:56:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:56:10,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 23:56:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:56:10,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:56:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:56:10,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 23:56:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:56:10,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:56:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:56:10,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:56:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:56:10,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 23:56:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:56:10,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 23:56:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:56:10,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-16 23:56:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:56:10,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:56:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:56:10,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-16 23:56:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:56:10,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-16 23:56:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:56:10,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-16 23:56:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:56:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-16 23:56:10,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:56:10,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915772305] [2021-11-16 23:56:10,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915772305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:56:10,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:56:10,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-16 23:56:10,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740927971] [2021-11-16 23:56:10,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:56:10,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 23:56:10,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:56:10,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 23:56:10,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-16 23:56:10,699 INFO L87 Difference]: Start difference. First operand 17512 states and 24735 transitions. Second operand has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 7 states have internal predecessors, (127), 3 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-16 23:56:17,512 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:19,546 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:21,586 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:23,615 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:25,653 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:27,691 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:29,724 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:31,744 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:38,127 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:40,168 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:42,204 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:44,240 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:46,281 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:48,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:50,342 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:56,666 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:58,465 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:56:59,725 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:57:02,328 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:57:03,835 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:57:09,784 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:57:12,027 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:57:14,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:57:14,075 INFO L93 Difference]: Finished difference Result 43126 states and 61569 transitions. [2021-11-16 23:57:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-16 23:57:14,076 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 7 states have internal predecessors, (127), 3 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 184 [2021-11-16 23:57:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:57:14,162 INFO L225 Difference]: With dead ends: 43126 [2021-11-16 23:57:14,162 INFO L226 Difference]: Without dead ends: 25617 [2021-11-16 23:57:14,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-11-16 23:57:14,201 INFO L933 BasicCegarLoop]: 2881 mSDtfsCounter, 3181 mSDsluCounter, 14246 mSDsCounter, 0 mSdLazyCounter, 9690 mSolverCounterSat, 1291 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3384 SdHoareTripleChecker+Valid, 17127 SdHoareTripleChecker+Invalid, 10998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1291 IncrementalHoareTripleChecker+Valid, 9690 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:57:14,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3384 Valid, 17127 Invalid, 10998 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1291 Valid, 9690 Invalid, 17 Unknown, 0 Unchecked, 62.0s Time] [2021-11-16 23:57:14,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25617 states. [2021-11-16 23:57:14,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25617 to 23844. [2021-11-16 23:57:14,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23844 states, 18900 states have (on average 1.3892063492063491) internal successors, (26256), 19239 states have internal predecessors, (26256), 3515 states have call successors, (3515), 1342 states have call predecessors, (3515), 1428 states have return successors, (3888), 3532 states have call predecessors, (3888), 3510 states have call successors, (3888) [2021-11-16 23:57:15,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23844 states to 23844 states and 33659 transitions. [2021-11-16 23:57:15,121 INFO L78 Accepts]: Start accepts. Automaton has 23844 states and 33659 transitions. Word has length 184 [2021-11-16 23:57:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:57:15,121 INFO L470 AbstractCegarLoop]: Abstraction has 23844 states and 33659 transitions. [2021-11-16 23:57:15,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 7 states have internal predecessors, (127), 3 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-16 23:57:15,122 INFO L276 IsEmpty]: Start isEmpty. Operand 23844 states and 33659 transitions. [2021-11-16 23:57:15,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-16 23:57:15,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:57:15,135 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:57:15,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-16 23:57:15,135 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:57:15,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:57:15,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1353598526, now seen corresponding path program 1 times [2021-11-16 23:57:15,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:57:15,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228569321] [2021-11-16 23:57:15,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:57:15,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:57:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:15,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:57:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:15,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:57:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:15,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:57:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:15,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:57:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:15,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 23:57:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:15,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:57:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:15,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 23:57:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:15,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:57:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:15,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:57:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:15,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 23:57:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:15,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-16 23:57:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:15,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-16 23:57:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:15,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:57:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:15,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-11-16 23:57:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:15,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-11-16 23:57:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:15,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-16 23:57:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-16 23:57:15,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:57:15,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228569321] [2021-11-16 23:57:15,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228569321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:57:15,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:57:15,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 23:57:15,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129980708] [2021-11-16 23:57:15,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:57:15,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 23:57:15,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:57:15,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 23:57:15,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-16 23:57:15,380 INFO L87 Difference]: Start difference. First operand 23844 states and 33659 transitions. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-16 23:57:19,662 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:57:21,700 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:57:23,743 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:57:25,785 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:57:29,570 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:57:34,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:57:34,512 INFO L93 Difference]: Finished difference Result 50297 states and 71857 transitions. [2021-11-16 23:57:34,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 23:57:34,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 186 [2021-11-16 23:57:34,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:57:34,672 INFO L225 Difference]: With dead ends: 50297 [2021-11-16 23:57:34,672 INFO L226 Difference]: Without dead ends: 26456 [2021-11-16 23:57:34,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-16 23:57:34,712 INFO L933 BasicCegarLoop]: 1464 mSDtfsCounter, 1888 mSDsluCounter, 3422 mSDsCounter, 0 mSdLazyCounter, 2704 mSolverCounterSat, 510 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2019 SdHoareTripleChecker+Valid, 4886 SdHoareTripleChecker+Invalid, 3218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 2704 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2021-11-16 23:57:34,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2019 Valid, 4886 Invalid, 3218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 2704 Invalid, 4 Unknown, 0 Unchecked, 18.1s Time] [2021-11-16 23:57:34,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26456 states. [2021-11-16 23:57:35,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26456 to 23876. [2021-11-16 23:57:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23876 states, 18932 states have (on average 1.3885484893302344) internal successors, (26288), 19271 states have internal predecessors, (26288), 3515 states have call successors, (3515), 1342 states have call predecessors, (3515), 1428 states have return successors, (3888), 3532 states have call predecessors, (3888), 3510 states have call successors, (3888) [2021-11-16 23:57:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23876 states to 23876 states and 33691 transitions. [2021-11-16 23:57:35,654 INFO L78 Accepts]: Start accepts. Automaton has 23876 states and 33691 transitions. Word has length 186 [2021-11-16 23:57:35,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:57:35,655 INFO L470 AbstractCegarLoop]: Abstraction has 23876 states and 33691 transitions. [2021-11-16 23:57:35,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-16 23:57:35,655 INFO L276 IsEmpty]: Start isEmpty. Operand 23876 states and 33691 transitions. [2021-11-16 23:57:35,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-16 23:57:35,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:57:35,674 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:57:35,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-16 23:57:35,674 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:57:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:57:35,675 INFO L85 PathProgramCache]: Analyzing trace with hash 904718948, now seen corresponding path program 1 times [2021-11-16 23:57:35,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:57:35,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270217524] [2021-11-16 23:57:35,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:57:35,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:57:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:35,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:57:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:35,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:57:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:35,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:57:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:35,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:57:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:35,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 23:57:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:35,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:57:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:35,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 23:57:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:35,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:57:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:36,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:57:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:36,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 23:57:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:36,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-16 23:57:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:36,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 23:57:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:36,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-11-16 23:57:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:36,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:57:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:36,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-16 23:57:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:36,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-16 23:57:36,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:36,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-11-16 23:57:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:57:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-16 23:57:36,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:57:36,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270217524] [2021-11-16 23:57:36,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270217524] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:57:36,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:57:36,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 23:57:36,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382079443] [2021-11-16 23:57:36,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:57:36,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 23:57:36,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:57:36,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 23:57:36,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-16 23:57:36,128 INFO L87 Difference]: Start difference. First operand 23876 states and 33691 transitions. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 5 states have internal predecessors, (128), 2 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-16 23:57:41,847 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:57:43,890 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:57:45,930 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:57:47,958 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:57:49,987 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:57:52,023 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:57:57,767 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:57:59,622 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:58:01,642 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:58:03,465 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:58:05,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:58:05,172 INFO L93 Difference]: Finished difference Result 26949 states and 38177 transitions. [2021-11-16 23:58:05,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 23:58:05,174 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 5 states have internal predecessors, (128), 2 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 194 [2021-11-16 23:58:05,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:58:05,282 INFO L225 Difference]: With dead ends: 26949 [2021-11-16 23:58:05,282 INFO L226 Difference]: Without dead ends: 25099 [2021-11-16 23:58:05,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-16 23:58:05,293 INFO L933 BasicCegarLoop]: 1450 mSDtfsCounter, 1694 mSDsluCounter, 5641 mSDsCounter, 0 mSdLazyCounter, 3740 mSolverCounterSat, 587 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1816 SdHoareTripleChecker+Valid, 7091 SdHoareTripleChecker+Invalid, 4334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 3740 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.2s IncrementalHoareTripleChecker+Time [2021-11-16 23:58:05,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1816 Valid, 7091 Invalid, 4334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 3740 Invalid, 7 Unknown, 0 Unchecked, 28.2s Time] [2021-11-16 23:58:05,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25099 states. [2021-11-16 23:58:06,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25099 to 23375. [2021-11-16 23:58:06,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23375 states, 18544 states have (on average 1.389344262295082) internal successors, (25764), 18868 states have internal predecessors, (25764), 3410 states have call successors, (3410), 1334 states have call predecessors, (3410), 1420 states have return successors, (3784), 3434 states have call predecessors, (3784), 3406 states have call successors, (3784) [2021-11-16 23:58:06,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23375 states to 23375 states and 32958 transitions. [2021-11-16 23:58:06,140 INFO L78 Accepts]: Start accepts. Automaton has 23375 states and 32958 transitions. Word has length 194 [2021-11-16 23:58:06,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:58:06,141 INFO L470 AbstractCegarLoop]: Abstraction has 23375 states and 32958 transitions. [2021-11-16 23:58:06,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 5 states have internal predecessors, (128), 2 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-16 23:58:06,141 INFO L276 IsEmpty]: Start isEmpty. Operand 23375 states and 32958 transitions. [2021-11-16 23:58:06,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-16 23:58:06,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:58:06,152 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:58:06,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-16 23:58:06,153 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:58:06,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:58:06,153 INFO L85 PathProgramCache]: Analyzing trace with hash -340045533, now seen corresponding path program 1 times [2021-11-16 23:58:06,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:58:06,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060996072] [2021-11-16 23:58:06,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:58:06,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:58:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:06,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:58:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:06,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:06,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:06,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:06,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 23:58:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:06,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:58:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:06,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 23:58:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:06,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:06,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:06,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 23:58:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:06,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-16 23:58:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:06,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 23:58:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:06,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-11-16 23:58:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:06,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:06,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-16 23:58:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:06,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-16 23:58:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:06,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-11-16 23:58:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-16 23:58:06,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:58:06,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060996072] [2021-11-16 23:58:06,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060996072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:58:06,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:58:06,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-16 23:58:06,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314341417] [2021-11-16 23:58:06,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:58:06,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 23:58:06,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:58:06,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 23:58:06,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-16 23:58:06,531 INFO L87 Difference]: Start difference. First operand 23375 states and 32958 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (20), 7 states have call predecessors, (20), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-16 23:58:10,133 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:58:12,163 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:58:14,196 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:58:18,949 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:58:20,451 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:58:22,650 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:58:25,853 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:58:27,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:58:27,826 INFO L93 Difference]: Finished difference Result 48445 states and 68528 transitions. [2021-11-16 23:58:27,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 23:58:27,827 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (20), 7 states have call predecessors, (20), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 194 [2021-11-16 23:58:27,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:58:27,915 INFO L225 Difference]: With dead ends: 48445 [2021-11-16 23:58:27,916 INFO L226 Difference]: Without dead ends: 25073 [2021-11-16 23:58:27,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-16 23:58:27,964 INFO L933 BasicCegarLoop]: 2733 mSDtfsCounter, 3715 mSDsluCounter, 2547 mSDsCounter, 0 mSdLazyCounter, 2453 mSolverCounterSat, 1593 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3899 SdHoareTripleChecker+Valid, 5280 SdHoareTripleChecker+Invalid, 4052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1593 IncrementalHoareTripleChecker+Valid, 2453 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2021-11-16 23:58:27,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3899 Valid, 5280 Invalid, 4052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1593 Valid, 2453 Invalid, 6 Unknown, 0 Unchecked, 20.2s Time] [2021-11-16 23:58:27,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25073 states. [2021-11-16 23:58:28,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25073 to 23059. [2021-11-16 23:58:28,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23059 states, 18345 states have (on average 1.3911692559280457) internal successors, (25521), 18648 states have internal predecessors, (25521), 3320 states have call successors, (3320), 1322 states have call predecessors, (3320), 1393 states have return successors, (3490), 3358 states have call predecessors, (3490), 3314 states have call successors, (3490) [2021-11-16 23:58:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23059 states to 23059 states and 32331 transitions. [2021-11-16 23:58:28,894 INFO L78 Accepts]: Start accepts. Automaton has 23059 states and 32331 transitions. Word has length 194 [2021-11-16 23:58:28,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:58:28,894 INFO L470 AbstractCegarLoop]: Abstraction has 23059 states and 32331 transitions. [2021-11-16 23:58:28,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (20), 7 states have call predecessors, (20), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-16 23:58:28,895 INFO L276 IsEmpty]: Start isEmpty. Operand 23059 states and 32331 transitions. [2021-11-16 23:58:28,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-16 23:58:28,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:58:28,906 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:58:28,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-16 23:58:28,906 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:58:28,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:58:28,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1536879835, now seen corresponding path program 1 times [2021-11-16 23:58:28,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:58:28,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088604506] [2021-11-16 23:58:28,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:58:28,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:58:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:58:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 23:58:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:58:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 23:58:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 23:58:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-16 23:58:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 23:58:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-11-16 23:58:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-16 23:58:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-11-16 23:58:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-11-16 23:58:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-11-16 23:58:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-11-16 23:58:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-11-16 23:58:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-16 23:58:29,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:58:29,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088604506] [2021-11-16 23:58:29,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088604506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:58:29,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:58:29,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-16 23:58:29,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792478574] [2021-11-16 23:58:29,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:58:29,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 23:58:29,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:58:29,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 23:58:29,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-16 23:58:29,212 INFO L87 Difference]: Start difference. First operand 23059 states and 32331 transitions. Second operand has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (23), 8 states have call predecessors, (23), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-16 23:58:33,470 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:58:35,512 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:58:41,204 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:58:43,258 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:58:46,754 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:58:47,773 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:58:49,791 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:58:52,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:58:52,086 INFO L93 Difference]: Finished difference Result 49551 states and 70140 transitions. [2021-11-16 23:58:52,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 23:58:52,086 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (23), 8 states have call predecessors, (23), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 199 [2021-11-16 23:58:52,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:58:52,188 INFO L225 Difference]: With dead ends: 49551 [2021-11-16 23:58:52,188 INFO L226 Difference]: Without dead ends: 26495 [2021-11-16 23:58:52,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-11-16 23:58:52,242 INFO L933 BasicCegarLoop]: 1418 mSDtfsCounter, 2176 mSDsluCounter, 2734 mSDsCounter, 0 mSdLazyCounter, 2435 mSolverCounterSat, 832 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2300 SdHoareTripleChecker+Valid, 4152 SdHoareTripleChecker+Invalid, 3273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 832 IncrementalHoareTripleChecker+Valid, 2435 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.7s IncrementalHoareTripleChecker+Time [2021-11-16 23:58:52,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2300 Valid, 4152 Invalid, 3273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [832 Valid, 2435 Invalid, 6 Unknown, 0 Unchecked, 21.7s Time] [2021-11-16 23:58:52,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26495 states. [2021-11-16 23:58:53,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26495 to 23075. [2021-11-16 23:58:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23075 states, 18361 states have (on average 1.390828386253472) internal successors, (25537), 18664 states have internal predecessors, (25537), 3320 states have call successors, (3320), 1322 states have call predecessors, (3320), 1393 states have return successors, (3490), 3358 states have call predecessors, (3490), 3314 states have call successors, (3490) [2021-11-16 23:58:53,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23075 states to 23075 states and 32347 transitions. [2021-11-16 23:58:53,216 INFO L78 Accepts]: Start accepts. Automaton has 23075 states and 32347 transitions. Word has length 199 [2021-11-16 23:58:53,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:58:53,217 INFO L470 AbstractCegarLoop]: Abstraction has 23075 states and 32347 transitions. [2021-11-16 23:58:53,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.11111111111111) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (23), 8 states have call predecessors, (23), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-16 23:58:53,217 INFO L276 IsEmpty]: Start isEmpty. Operand 23075 states and 32347 transitions. [2021-11-16 23:58:53,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-16 23:58:53,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:58:53,229 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:58:53,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-16 23:58:53,229 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:58:53,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:58:53,229 INFO L85 PathProgramCache]: Analyzing trace with hash 6318164, now seen corresponding path program 1 times [2021-11-16 23:58:53,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:58:53,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623127663] [2021-11-16 23:58:53,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:58:53,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:58:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:58:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 23:58:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:58:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 23:58:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 23:58:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-16 23:58:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 23:58:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-11-16 23:58:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-16 23:58:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-11-16 23:58:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-11-16 23:58:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-11-16 23:58:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-11-16 23:58:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 23:58:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-11-16 23:58:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-16 23:58:53,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:58:53,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623127663] [2021-11-16 23:58:53,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623127663] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 23:58:53,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774013020] [2021-11-16 23:58:53,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:58:53,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 23:58:53,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 23:58:53,560 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 23:58:53,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-16 23:58:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:54,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 2431 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-16 23:58:54,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 23:58:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-16 23:58:54,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 23:58:54,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774013020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:58:54,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 23:58:54,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-11-16 23:58:54,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436145766] [2021-11-16 23:58:54,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:58:54,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 23:58:54,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:58:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 23:58:54,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-16 23:58:54,460 INFO L87 Difference]: Start difference. First operand 23075 states and 32347 transitions. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 5 states have internal predecessors, (133), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-16 23:58:55,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:58:55,226 INFO L93 Difference]: Finished difference Result 24189 states and 33772 transitions. [2021-11-16 23:58:55,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 23:58:55,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 5 states have internal predecessors, (133), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 207 [2021-11-16 23:58:55,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:58:55,304 INFO L225 Difference]: With dead ends: 24189 [2021-11-16 23:58:55,304 INFO L226 Difference]: Without dead ends: 22774 [2021-11-16 23:58:55,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-16 23:58:55,321 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 9 mSDsluCounter, 6493 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8119 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:58:55,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 8119 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 23:58:55,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22774 states. [2021-11-16 23:58:56,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22774 to 22742. [2021-11-16 23:58:56,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22742 states, 18150 states have (on average 1.3922865013774104) internal successors, (25270), 18437 states have internal predecessors, (25270), 3230 states have call successors, (3230), 1289 states have call predecessors, (3230), 1361 states have return successors, (3402), 3277 states have call predecessors, (3402), 3226 states have call successors, (3402) [2021-11-16 23:58:56,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22742 states to 22742 states and 31902 transitions. [2021-11-16 23:58:56,226 INFO L78 Accepts]: Start accepts. Automaton has 22742 states and 31902 transitions. Word has length 207 [2021-11-16 23:58:56,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:58:56,226 INFO L470 AbstractCegarLoop]: Abstraction has 22742 states and 31902 transitions. [2021-11-16 23:58:56,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 5 states have internal predecessors, (133), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-16 23:58:56,227 INFO L276 IsEmpty]: Start isEmpty. Operand 22742 states and 31902 transitions. [2021-11-16 23:58:56,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-16 23:58:56,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:58:56,246 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:58:56,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-16 23:58:56,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-16 23:58:56,467 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:58:56,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:58:56,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1585762242, now seen corresponding path program 1 times [2021-11-16 23:58:56,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:58:56,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217595968] [2021-11-16 23:58:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:58:56,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:58:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:58:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 23:58:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:58:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 23:58:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 23:58:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-16 23:58:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 23:58:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-16 23:58:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:58:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 23:58:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 23:58:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 23:58:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-16 23:58:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 23:58:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 23:58:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-16 23:58:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-16 23:58:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-16 23:58:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-16 23:58:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-16 23:58:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 23:58:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 23:58:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 23:58:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-16 23:58:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:58:56,906 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-16 23:58:56,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:58:56,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217595968] [2021-11-16 23:58:56,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217595968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:58:56,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:58:56,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-16 23:58:56,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127343539] [2021-11-16 23:58:56,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:58:56,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 23:58:56,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:58:56,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 23:58:56,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-16 23:58:56,909 INFO L87 Difference]: Start difference. First operand 22742 states and 31902 transitions. Second operand has 11 states, 11 states have (on average 14.909090909090908) internal successors, (164), 5 states have internal predecessors, (164), 2 states have call successors, (29), 7 states have call predecessors, (29), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-16 23:59:02,207 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:59:04,247 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:59:06,297 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:59:08,332 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:59:10,357 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:59:15,155 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:59:17,370 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:59:19,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:59:19,493 INFO L93 Difference]: Finished difference Result 35453 states and 50068 transitions. [2021-11-16 23:59:19,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 23:59:19,494 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.909090909090908) internal successors, (164), 5 states have internal predecessors, (164), 2 states have call successors, (29), 7 states have call predecessors, (29), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) Word has length 256 [2021-11-16 23:59:19,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:59:19,568 INFO L225 Difference]: With dead ends: 35453 [2021-11-16 23:59:19,568 INFO L226 Difference]: Without dead ends: 24502 [2021-11-16 23:59:19,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-16 23:59:19,594 INFO L933 BasicCegarLoop]: 1455 mSDtfsCounter, 1985 mSDsluCounter, 6019 mSDsCounter, 0 mSdLazyCounter, 4157 mSolverCounterSat, 827 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2101 SdHoareTripleChecker+Valid, 7474 SdHoareTripleChecker+Invalid, 4990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 827 IncrementalHoareTripleChecker+Valid, 4157 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2021-11-16 23:59:19,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2101 Valid, 7474 Invalid, 4990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [827 Valid, 4157 Invalid, 6 Unknown, 0 Unchecked, 21.6s Time] [2021-11-16 23:59:19,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24502 states. [2021-11-16 23:59:20,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24502 to 22734. [2021-11-16 23:59:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22734 states, 18142 states have (on average 1.3920185205600264) internal successors, (25254), 18429 states have internal predecessors, (25254), 3230 states have call successors, (3230), 1289 states have call predecessors, (3230), 1361 states have return successors, (3402), 3277 states have call predecessors, (3402), 3226 states have call successors, (3402) [2021-11-16 23:59:20,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22734 states to 22734 states and 31886 transitions. [2021-11-16 23:59:20,564 INFO L78 Accepts]: Start accepts. Automaton has 22734 states and 31886 transitions. Word has length 256 [2021-11-16 23:59:20,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:59:20,565 INFO L470 AbstractCegarLoop]: Abstraction has 22734 states and 31886 transitions. [2021-11-16 23:59:20,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.909090909090908) internal successors, (164), 5 states have internal predecessors, (164), 2 states have call successors, (29), 7 states have call predecessors, (29), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-16 23:59:20,565 INFO L276 IsEmpty]: Start isEmpty. Operand 22734 states and 31886 transitions. [2021-11-16 23:59:20,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-16 23:59:20,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:59:20,585 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:59:20,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-16 23:59:20,586 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:59:20,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:59:20,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1305102105, now seen corresponding path program 1 times [2021-11-16 23:59:20,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:59:20,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66514985] [2021-11-16 23:59:20,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:59:20,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:59:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:59:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:59:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:59:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:59:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 23:59:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 23:59:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 23:59:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:59:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:59:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-16 23:59:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-16 23:59:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 23:59:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-16 23:59:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:59:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:59:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 23:59:20,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-16 23:59:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-16 23:59:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 23:59:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:20,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 23:59:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:21,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 23:59:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:21,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 23:59:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:21,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-16 23:59:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:21,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-16 23:59:21,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:21,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 23:59:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:21,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 23:59:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:21,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-16 23:59:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:21,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-16 23:59:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:21,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 23:59:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:21,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-16 23:59:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:59:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-16 23:59:21,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:59:21,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66514985] [2021-11-16 23:59:21,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66514985] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:59:21,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:59:21,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-16 23:59:21,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828769921] [2021-11-16 23:59:21,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:59:21,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 23:59:21,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:59:21,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 23:59:21,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-16 23:59:21,065 INFO L87 Difference]: Start difference. First operand 22734 states and 31886 transitions. Second operand has 11 states, 11 states have (on average 15.0) internal successors, (165), 5 states have internal predecessors, (165), 2 states have call successors, (29), 7 states have call predecessors, (29), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-16 23:59:25,818 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:59:27,852 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:59:29,889 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:59:31,926 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:59:33,958 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:59:40,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:59:43,169 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:59:45,189 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:59:46,802 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:59:48,027 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:59:50,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:59:50,098 INFO L93 Difference]: Finished difference Result 25098 states and 35229 transitions. [2021-11-16 23:59:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 23:59:50,099 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.0) internal successors, (165), 5 states have internal predecessors, (165), 2 states have call successors, (29), 7 states have call predecessors, (29), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) Word has length 257 [2021-11-16 23:59:50,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:59:50,102 INFO L225 Difference]: With dead ends: 25098 [2021-11-16 23:59:50,102 INFO L226 Difference]: Without dead ends: 0 [2021-11-16 23:59:50,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-16 23:59:50,142 INFO L933 BasicCegarLoop]: 1445 mSDtfsCounter, 2374 mSDsluCounter, 5183 mSDsCounter, 0 mSdLazyCounter, 3551 mSolverCounterSat, 904 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2495 SdHoareTripleChecker+Valid, 6628 SdHoareTripleChecker+Invalid, 4463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 904 IncrementalHoareTripleChecker+Valid, 3551 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.3s IncrementalHoareTripleChecker+Time [2021-11-16 23:59:50,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2495 Valid, 6628 Invalid, 4463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [904 Valid, 3551 Invalid, 8 Unknown, 0 Unchecked, 28.3s Time] [2021-11-16 23:59:50,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-16 23:59:50,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-16 23:59:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-16 23:59:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-16 23:59:50,145 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 257 [2021-11-16 23:59:50,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:59:50,145 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-16 23:59:50,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.0) internal successors, (165), 5 states have internal predecessors, (165), 2 states have call successors, (29), 7 states have call predecessors, (29), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-16 23:59:50,145 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-16 23:59:50,145 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-16 23:59:50,147 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-16 23:59:50,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-16 23:59:50,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-17 00:00:35,826 WARN L227 SmtUtils]: Spent 44.56s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-17 00:01:16,743 WARN L227 SmtUtils]: Spent 40.91s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-17 00:01:57,474 WARN L227 SmtUtils]: Spent 40.73s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-17 00:02:41,351 WARN L227 SmtUtils]: Spent 43.87s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-17 00:04:11,034 WARN L227 SmtUtils]: Spent 1.49m on a formula simplification that was a NOOP. DAG size: 101 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-17 00:05:41,228 WARN L227 SmtUtils]: Spent 1.50m on a formula simplification that was a NOOP. DAG size: 101 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) Killed by 15