./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.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 0408b8dd1e50dba1d05ee8137dbd65dd8b8c61dcceb5e60c09fc08110798cce8 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:58:13,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:58:13,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:58:13,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:58:13,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:58:13,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:58:13,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:58:13,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:58:13,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:58:13,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:58:13,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:58:13,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:58:13,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:58:13,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:58:13,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:58:13,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:58:13,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:58:13,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:58:13,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:58:13,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:58:13,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:58:13,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:58:13,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:58:13,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:58:13,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:58:13,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:58:13,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:58:13,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:58:13,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:58:13,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:58:13,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:58:13,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:58:13,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:58:13,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:58:13,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:58:13,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:58:13,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:58:13,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:58:13,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:58:13,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:58:13,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:58:13,262 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-16 03:58:13,287 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:58:13,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:58:13,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:58:13,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:58:13,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:58:13,289 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:58:13,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:58:13,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:58:13,290 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:58:13,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:58:13,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:58:13,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:58:13,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:58:13,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:58:13,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:58:13,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:58:13,291 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:58:13,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:58:13,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:58:13,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:58:13,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:58:13,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:58:13,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:58:13,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:58:13,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:58:13,299 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:58:13,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:58:13,299 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:58:13,299 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:58:13,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:58:13,300 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:58:13,300 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0408b8dd1e50dba1d05ee8137dbd65dd8b8c61dcceb5e60c09fc08110798cce8 [2021-12-16 03:58:13,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:58:13,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:58:13,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:58:13,509 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:58:13,510 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:58:13,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-12-16 03:58:13,565 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/003064e89/8dbf58ff216b4682a75a8c5428cc510a/FLAG03af7be4a [2021-12-16 03:58:14,124 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:58:14,124 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-12-16 03:58:14,159 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/003064e89/8dbf58ff216b4682a75a8c5428cc510a/FLAG03af7be4a [2021-12-16 03:58:14,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/003064e89/8dbf58ff216b4682a75a8c5428cc510a [2021-12-16 03:58:14,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:58:14,537 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:58:14,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:58:14,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:58:14,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:58:14,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:58:14" (1/1) ... [2021-12-16 03:58:14,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3734194b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:58:14, skipping insertion in model container [2021-12-16 03:58:14,542 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:58:14" (1/1) ... [2021-12-16 03:58:14,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:58:14,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:58:15,042 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-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i[149470,149483] [2021-12-16 03:58:15,213 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:58:15,226 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:58:15,340 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-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i[149470,149483] [2021-12-16 03:58:15,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:58:15,434 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:58:15,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:58:15 WrapperNode [2021-12-16 03:58:15,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:58:15,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:58:15,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:58:15,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:58:15,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:58:15" (1/1) ... [2021-12-16 03:58:15,476 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:58:15" (1/1) ... [2021-12-16 03:58:15,533 INFO L137 Inliner]: procedures = 88, calls = 403, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 1034 [2021-12-16 03:58:15,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:58:15,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:58:15,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:58:15,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:58:15,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:58:15" (1/1) ... [2021-12-16 03:58:15,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:58:15" (1/1) ... [2021-12-16 03:58:15,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:58:15" (1/1) ... [2021-12-16 03:58:15,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:58:15" (1/1) ... [2021-12-16 03:58:15,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:58:15" (1/1) ... [2021-12-16 03:58:15,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:58:15" (1/1) ... [2021-12-16 03:58:15,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:58:15" (1/1) ... [2021-12-16 03:58:15,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:58:15,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:58:15,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:58:15,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:58:15,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:58:15" (1/1) ... [2021-12-16 03:58:15,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:58:15,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:58:15,713 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) [2021-12-16 03:58:15,728 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 [2021-12-16 03:58:15,741 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2021-12-16 03:58:15,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2021-12-16 03:58:15,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:58:15,742 INFO L130 BoogieDeclarations]: Found specification of procedure load_pkt [2021-12-16 03:58:15,742 INFO L138 BoogieDeclarations]: Found implementation of procedure load_pkt [2021-12-16 03:58:15,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-16 03:58:15,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:58:15,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 03:58:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-16 03:58:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-16 03:58:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-16 03:58:15,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-16 03:58:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:58:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 03:58:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-12-16 03:58:15,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-12-16 03:58:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-16 03:58:15,744 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-16 03:58:15,744 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-16 03:58:15,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-16 03:58:15,744 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_skb_12 [2021-12-16 03:58:15,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_skb_12 [2021-12-16 03:58:15,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:58:15,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 03:58:15,744 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-12-16 03:58:15,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-12-16 03:58:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure type_trans [2021-12-16 03:58:15,745 INFO L138 BoogieDeclarations]: Found implementation of procedure type_trans [2021-12-16 03:58:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-12-16 03:58:15,745 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-12-16 03:58:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:58:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-16 03:58:15,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-16 03:58:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-12-16 03:58:15,746 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-12-16 03:58:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 03:58:15,746 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 03:58:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:58:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 03:58:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~X~$Pointer$~X~int~TO~VOID [2021-12-16 03:58:15,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~X~$Pointer$~X~int~TO~VOID [2021-12-16 03:58:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-16 03:58:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-16 03:58:15,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-16 03:58:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-12-16 03:58:15,747 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-12-16 03:58:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:58:15,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:58:16,025 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:58:16,027 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:58:16,207 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-16 03:58:16,757 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:58:16,770 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:58:16,771 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-16 03:58:16,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:58:16 BoogieIcfgContainer [2021-12-16 03:58:16,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:58:16,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:58:16,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:58:16,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:58:16,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:58:14" (1/3) ... [2021-12-16 03:58:16,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d256894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:58:16, skipping insertion in model container [2021-12-16 03:58:16,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:58:15" (2/3) ... [2021-12-16 03:58:16,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d256894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:58:16, skipping insertion in model container [2021-12-16 03:58:16,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:58:16" (3/3) ... [2021-12-16 03:58:16,780 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-12-16 03:58:16,783 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:58:16,784 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:58:16,826 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:58:16,831 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 [2021-12-16 03:58:16,832 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 03:58:16,848 INFO L276 IsEmpty]: Start isEmpty. Operand has 305 states, 243 states have (on average 1.4444444444444444) internal successors, (351), 248 states have internal predecessors, (351), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-16 03:58:16,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 03:58:16,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:16,855 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] [2021-12-16 03:58:16,856 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:16,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:16,859 INFO L85 PathProgramCache]: Analyzing trace with hash 722424881, now seen corresponding path program 1 times [2021-12-16 03:58:16,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:16,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561574368] [2021-12-16 03:58:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:16,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:17,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:58:17,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:17,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561574368] [2021-12-16 03:58:17,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561574368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:58:17,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:58:17,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 03:58:17,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40808196] [2021-12-16 03:58:17,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:58:17,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:58:17,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:17,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:58:17,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:58:17,182 INFO L87 Difference]: Start difference. First operand has 305 states, 243 states have (on average 1.4444444444444444) internal successors, (351), 248 states have internal predecessors, (351), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 03:58:17,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:58:17,876 INFO L93 Difference]: Finished difference Result 947 states and 1418 transitions. [2021-12-16 03:58:17,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:58:17,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-16 03:58:17,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:58:17,889 INFO L225 Difference]: With dead ends: 947 [2021-12-16 03:58:17,889 INFO L226 Difference]: Without dead ends: 633 [2021-12-16 03:58:17,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:58:17,896 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 503 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 03:58:17,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 1061 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 03:58:17,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-12-16 03:58:17,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 565. [2021-12-16 03:58:17,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 456 states have (on average 1.4078947368421053) internal successors, (642), 456 states have internal predecessors, (642), 80 states have call successors, (80), 29 states have call predecessors, (80), 28 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2021-12-16 03:58:17,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 801 transitions. [2021-12-16 03:58:17,961 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 801 transitions. Word has length 25 [2021-12-16 03:58:17,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:58:17,962 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 801 transitions. [2021-12-16 03:58:17,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 03:58:17,962 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 801 transitions. [2021-12-16 03:58:17,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 03:58:17,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:17,966 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] [2021-12-16 03:58:17,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:58:17,967 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:17,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:17,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1364109622, now seen corresponding path program 1 times [2021-12-16 03:58:17,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:17,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292558236] [2021-12-16 03:58:17,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:17,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:18,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:58:18,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:18,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292558236] [2021-12-16 03:58:18,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292558236] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:58:18,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:58:18,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:58:18,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304667190] [2021-12-16 03:58:18,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:58:18,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:58:18,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:18,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:58:18,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:58:18,081 INFO L87 Difference]: Start difference. First operand 565 states and 801 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 03:58:18,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:58:18,711 INFO L93 Difference]: Finished difference Result 1189 states and 1695 transitions. [2021-12-16 03:58:18,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:58:18,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-12-16 03:58:18,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:58:18,716 INFO L225 Difference]: With dead ends: 1189 [2021-12-16 03:58:18,716 INFO L226 Difference]: Without dead ends: 632 [2021-12-16 03:58:18,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:58:18,718 INFO L933 BasicCegarLoop]: 620 mSDtfsCounter, 701 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 03:58:18,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 1344 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 03:58:18,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-12-16 03:58:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 564. [2021-12-16 03:58:18,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 455 states have (on average 1.402197802197802) internal successors, (638), 455 states have internal predecessors, (638), 80 states have call successors, (80), 29 states have call predecessors, (80), 28 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2021-12-16 03:58:18,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 797 transitions. [2021-12-16 03:58:18,749 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 797 transitions. Word has length 29 [2021-12-16 03:58:18,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:58:18,750 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 797 transitions. [2021-12-16 03:58:18,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 03:58:18,750 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 797 transitions. [2021-12-16 03:58:18,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-16 03:58:18,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:18,755 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-16 03:58:18,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 03:58:18,756 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:18,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:18,762 INFO L85 PathProgramCache]: Analyzing trace with hash -2094845703, now seen corresponding path program 1 times [2021-12-16 03:58:18,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:18,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763375314] [2021-12-16 03:58:18,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:18,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:18,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:18,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:58:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:18,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 03:58:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-16 03:58:18,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:18,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763375314] [2021-12-16 03:58:18,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763375314] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:58:18,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:58:18,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:58:18,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720117188] [2021-12-16 03:58:18,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:58:18,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:58:18,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:18,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:58:18,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:58:18,869 INFO L87 Difference]: Start difference. First operand 564 states and 797 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 03:58:19,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:58:19,521 INFO L93 Difference]: Finished difference Result 1799 states and 2590 transitions. [2021-12-16 03:58:19,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:58:19,521 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2021-12-16 03:58:19,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:58:19,528 INFO L225 Difference]: With dead ends: 1799 [2021-12-16 03:58:19,528 INFO L226 Difference]: Without dead ends: 1238 [2021-12-16 03:58:19,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:58:19,531 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 491 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 03:58:19,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 1891 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 03:58:19,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-12-16 03:58:19,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1138. [2021-12-16 03:58:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 917 states have (on average 1.4034896401308614) internal successors, (1287), 919 states have internal predecessors, (1287), 158 states have call successors, (158), 57 states have call predecessors, (158), 62 states have return successors, (179), 161 states have call predecessors, (179), 157 states have call successors, (179) [2021-12-16 03:58:19,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1624 transitions. [2021-12-16 03:58:19,570 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1624 transitions. Word has length 50 [2021-12-16 03:58:19,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:58:19,570 INFO L470 AbstractCegarLoop]: Abstraction has 1138 states and 1624 transitions. [2021-12-16 03:58:19,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 03:58:19,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1624 transitions. [2021-12-16 03:58:19,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-16 03:58:19,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:19,576 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:58:19,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 03:58:19,576 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:19,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:19,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1094727353, now seen corresponding path program 1 times [2021-12-16 03:58:19,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:19,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774181829] [2021-12-16 03:58:19,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:19,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:19,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:19,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-16 03:58:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:19,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 03:58:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:19,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:19,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:19,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-16 03:58:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:19,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 03:58:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-16 03:58:19,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:19,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774181829] [2021-12-16 03:58:19,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774181829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:58:19,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:58:19,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:58:19,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506780273] [2021-12-16 03:58:19,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:58:19,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:58:19,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:19,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:58:19,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:58:19,721 INFO L87 Difference]: Start difference. First operand 1138 states and 1624 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 03:58:20,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:58:20,269 INFO L93 Difference]: Finished difference Result 1832 states and 2618 transitions. [2021-12-16 03:58:20,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:58:20,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 97 [2021-12-16 03:58:20,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:58:20,272 INFO L225 Difference]: With dead ends: 1832 [2021-12-16 03:58:20,272 INFO L226 Difference]: Without dead ends: 702 [2021-12-16 03:58:20,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:58:20,276 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 112 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 03:58:20,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1140 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 03:58:20,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-12-16 03:58:20,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 642. [2021-12-16 03:58:20,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 523 states have (on average 1.395793499043977) internal successors, (730), 525 states have internal predecessors, (730), 83 states have call successors, (83), 31 states have call predecessors, (83), 35 states have return successors, (97), 85 states have call predecessors, (97), 82 states have call successors, (97) [2021-12-16 03:58:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 910 transitions. [2021-12-16 03:58:20,310 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 910 transitions. Word has length 97 [2021-12-16 03:58:20,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:58:20,311 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 910 transitions. [2021-12-16 03:58:20,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 03:58:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 910 transitions. [2021-12-16 03:58:20,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-16 03:58:20,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:20,314 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:58:20,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 03:58:20,315 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:20,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:20,315 INFO L85 PathProgramCache]: Analyzing trace with hash -660311895, now seen corresponding path program 2 times [2021-12-16 03:58:20,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:20,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489896126] [2021-12-16 03:58:20,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:20,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:20,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:20,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:58:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:20,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 03:58:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:20,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:58:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:20,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:58:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:20,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:20,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 03:58:20,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:20,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489896126] [2021-12-16 03:58:20,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489896126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:58:20,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:58:20,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-16 03:58:20,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117862870] [2021-12-16 03:58:20,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:58:20,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 03:58:20,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:20,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 03:58:20,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:58:20,543 INFO L87 Difference]: Start difference. First operand 642 states and 910 transitions. Second operand has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 7 states have internal predecessors, (74), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-16 03:58:21,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:58:21,298 INFO L93 Difference]: Finished difference Result 1319 states and 1895 transitions. [2021-12-16 03:58:21,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 03:58:21,299 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 7 states have internal predecessors, (74), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) Word has length 97 [2021-12-16 03:58:21,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:58:21,302 INFO L225 Difference]: With dead ends: 1319 [2021-12-16 03:58:21,302 INFO L226 Difference]: Without dead ends: 709 [2021-12-16 03:58:21,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:58:21,304 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 137 mSDsluCounter, 2740 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 3134 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 03:58:21,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 3134 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 03:58:21,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-12-16 03:58:21,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 665. [2021-12-16 03:58:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 541 states have (on average 1.388170055452865) internal successors, (751), 545 states have internal predecessors, (751), 83 states have call successors, (83), 31 states have call predecessors, (83), 40 states have return successors, (105), 88 states have call predecessors, (105), 82 states have call successors, (105) [2021-12-16 03:58:21,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 939 transitions. [2021-12-16 03:58:21,325 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 939 transitions. Word has length 97 [2021-12-16 03:58:21,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:58:21,325 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 939 transitions. [2021-12-16 03:58:21,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 7 states have internal predecessors, (74), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-16 03:58:21,326 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 939 transitions. [2021-12-16 03:58:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-16 03:58:21,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:21,359 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:58:21,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 03:58:21,359 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:21,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:21,360 INFO L85 PathProgramCache]: Analyzing trace with hash 491714592, now seen corresponding path program 1 times [2021-12-16 03:58:21,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:21,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951764726] [2021-12-16 03:58:21,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:21,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:21,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:21,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:58:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:21,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 03:58:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:21,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:58:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:21,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 03:58:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:21,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:21,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:21,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:58:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 03:58:21,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:21,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951764726] [2021-12-16 03:58:21,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951764726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:58:21,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:58:21,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-16 03:58:21,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794116255] [2021-12-16 03:58:21,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:58:21,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 03:58:21,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:21,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 03:58:21,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-12-16 03:58:21,620 INFO L87 Difference]: Start difference. First operand 665 states and 939 transitions. Second operand has 15 states, 14 states have (on average 5.642857142857143) internal successors, (79), 10 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 03:58:22,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:58:22,364 INFO L93 Difference]: Finished difference Result 1341 states and 1922 transitions. [2021-12-16 03:58:22,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 03:58:22,364 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.642857142857143) internal successors, (79), 10 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) Word has length 104 [2021-12-16 03:58:22,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:58:22,367 INFO L225 Difference]: With dead ends: 1341 [2021-12-16 03:58:22,367 INFO L226 Difference]: Without dead ends: 708 [2021-12-16 03:58:22,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-12-16 03:58:22,369 INFO L933 BasicCegarLoop]: 409 mSDtfsCounter, 133 mSDsluCounter, 4334 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 4743 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 03:58:22,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 4743 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 03:58:22,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-12-16 03:58:22,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 652. [2021-12-16 03:58:22,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 530 states have (on average 1.3867924528301887) internal successors, (735), 533 states have internal predecessors, (735), 83 states have call successors, (83), 31 states have call predecessors, (83), 38 states have return successors, (102), 87 states have call predecessors, (102), 82 states have call successors, (102) [2021-12-16 03:58:22,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 920 transitions. [2021-12-16 03:58:22,388 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 920 transitions. Word has length 104 [2021-12-16 03:58:22,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:58:22,389 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 920 transitions. [2021-12-16 03:58:22,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.642857142857143) internal successors, (79), 10 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 03:58:22,389 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 920 transitions. [2021-12-16 03:58:22,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-16 03:58:22,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:22,391 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:58:22,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 03:58:22,391 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:22,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:22,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1670558493, now seen corresponding path program 1 times [2021-12-16 03:58:22,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:22,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806296990] [2021-12-16 03:58:22,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:22,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:22,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:22,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:58:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:22,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 03:58:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:22,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:58:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:22,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 03:58:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:22,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:22,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:22,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 03:58:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 03:58:22,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:22,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806296990] [2021-12-16 03:58:22,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806296990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:58:22,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:58:22,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:58:22,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963194341] [2021-12-16 03:58:22,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:58:22,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:58:22,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:22,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:58:22,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:58:22,556 INFO L87 Difference]: Start difference. First operand 652 states and 920 transitions. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 03:58:23,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:58:23,065 INFO L93 Difference]: Finished difference Result 1334 states and 1919 transitions. [2021-12-16 03:58:23,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:58:23,066 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 108 [2021-12-16 03:58:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:58:23,069 INFO L225 Difference]: With dead ends: 1334 [2021-12-16 03:58:23,069 INFO L226 Difference]: Without dead ends: 714 [2021-12-16 03:58:23,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:58:23,071 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 140 mSDsluCounter, 1574 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 03:58:23,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 1969 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 03:58:23,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-12-16 03:58:23,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 648. [2021-12-16 03:58:23,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 525 states have (on average 1.380952380952381) internal successors, (725), 528 states have internal predecessors, (725), 84 states have call successors, (84), 31 states have call predecessors, (84), 38 states have return successors, (106), 88 states have call predecessors, (106), 83 states have call successors, (106) [2021-12-16 03:58:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 915 transitions. [2021-12-16 03:58:23,089 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 915 transitions. Word has length 108 [2021-12-16 03:58:23,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:58:23,090 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 915 transitions. [2021-12-16 03:58:23,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 03:58:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 915 transitions. [2021-12-16 03:58:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-16 03:58:23,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:23,091 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:58:23,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 03:58:23,092 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:23,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:23,092 INFO L85 PathProgramCache]: Analyzing trace with hash -556686604, now seen corresponding path program 1 times [2021-12-16 03:58:23,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:23,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693744687] [2021-12-16 03:58:23,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:23,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:23,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:23,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 03:58:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:23,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 03:58:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:23,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:58:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:23,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 03:58:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:23,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:23,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:23,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:58:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:23,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 03:58:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-16 03:58:23,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:23,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693744687] [2021-12-16 03:58:23,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693744687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:58:23,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:58:23,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:58:23,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790668276] [2021-12-16 03:58:23,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:58:23,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:58:23,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:23,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:58:23,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:58:23,218 INFO L87 Difference]: Start difference. First operand 648 states and 915 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:58:23,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:58:23,797 INFO L93 Difference]: Finished difference Result 1345 states and 1922 transitions. [2021-12-16 03:58:23,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:58:23,797 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 115 [2021-12-16 03:58:23,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:58:23,800 INFO L225 Difference]: With dead ends: 1345 [2021-12-16 03:58:23,800 INFO L226 Difference]: Without dead ends: 715 [2021-12-16 03:58:23,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:58:23,802 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 93 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1413 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 03:58:23,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1413 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 03:58:23,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-12-16 03:58:23,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 649. [2021-12-16 03:58:23,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 526 states have (on average 1.3802281368821292) internal successors, (726), 529 states have internal predecessors, (726), 84 states have call successors, (84), 31 states have call predecessors, (84), 38 states have return successors, (106), 88 states have call predecessors, (106), 83 states have call successors, (106) [2021-12-16 03:58:23,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 916 transitions. [2021-12-16 03:58:23,835 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 916 transitions. Word has length 115 [2021-12-16 03:58:23,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:58:23,836 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 916 transitions. [2021-12-16 03:58:23,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:58:23,836 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 916 transitions. [2021-12-16 03:58:23,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-16 03:58:23,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:23,838 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:58:23,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 03:58:23,838 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:23,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:23,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1428826331, now seen corresponding path program 1 times [2021-12-16 03:58:23,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:23,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182202894] [2021-12-16 03:58:23,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:23,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:23,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:23,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:58:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:23,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:58:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:23,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:58:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:23,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 03:58:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:24,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:24,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:24,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:58:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:24,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 03:58:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 03:58:24,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:24,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182202894] [2021-12-16 03:58:24,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182202894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:58:24,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:58:24,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 03:58:24,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090083603] [2021-12-16 03:58:24,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:58:24,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:58:24,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:24,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:58:24,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:58:24,288 INFO L87 Difference]: Start difference. First operand 649 states and 916 transitions. Second operand has 19 states, 18 states have (on average 4.666666666666667) internal successors, (84), 12 states have internal predecessors, (84), 4 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 03:58:25,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:58:25,499 INFO L93 Difference]: Finished difference Result 1569 states and 2281 transitions. [2021-12-16 03:58:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 03:58:25,500 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.666666666666667) internal successors, (84), 12 states have internal predecessors, (84), 4 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) Word has length 111 [2021-12-16 03:58:25,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:58:25,504 INFO L225 Difference]: With dead ends: 1569 [2021-12-16 03:58:25,504 INFO L226 Difference]: Without dead ends: 953 [2021-12-16 03:58:25,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-12-16 03:58:25,507 INFO L933 BasicCegarLoop]: 555 mSDtfsCounter, 242 mSDsluCounter, 7303 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 7858 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:58:25,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 7858 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-16 03:58:25,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-12-16 03:58:25,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 656. [2021-12-16 03:58:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 532 states have (on average 1.3759398496240602) internal successors, (732), 533 states have internal predecessors, (732), 85 states have call successors, (85), 31 states have call predecessors, (85), 38 states have return successors, (105), 91 states have call predecessors, (105), 84 states have call successors, (105) [2021-12-16 03:58:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 922 transitions. [2021-12-16 03:58:25,532 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 922 transitions. Word has length 111 [2021-12-16 03:58:25,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:58:25,532 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 922 transitions. [2021-12-16 03:58:25,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.666666666666667) internal successors, (84), 12 states have internal predecessors, (84), 4 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 03:58:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 922 transitions. [2021-12-16 03:58:25,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-16 03:58:25,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:25,534 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:58:25,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 03:58:25,535 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:25,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:25,535 INFO L85 PathProgramCache]: Analyzing trace with hash -363635253, now seen corresponding path program 1 times [2021-12-16 03:58:25,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:25,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079492953] [2021-12-16 03:58:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:25,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:25,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:25,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:58:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:25,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:58:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:25,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:58:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:25,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:58:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:25,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:25,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:25,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:58:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:25,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 03:58:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 03:58:25,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:25,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079492953] [2021-12-16 03:58:25,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079492953] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:58:25,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:58:25,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:58:25,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505749625] [2021-12-16 03:58:25,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:58:25,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:58:25,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:25,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:58:25,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:58:25,723 INFO L87 Difference]: Start difference. First operand 656 states and 922 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:58:26,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:58:26,636 INFO L93 Difference]: Finished difference Result 1520 states and 2195 transitions. [2021-12-16 03:58:26,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:58:26,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 116 [2021-12-16 03:58:26,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:58:26,641 INFO L225 Difference]: With dead ends: 1520 [2021-12-16 03:58:26,641 INFO L226 Difference]: Without dead ends: 897 [2021-12-16 03:58:26,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:58:26,643 INFO L933 BasicCegarLoop]: 452 mSDtfsCounter, 317 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1716 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 03:58:26,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 1716 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 03:58:26,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-12-16 03:58:26,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 664. [2021-12-16 03:58:26,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 540 states have (on average 1.3777777777777778) internal successors, (744), 541 states have internal predecessors, (744), 85 states have call successors, (85), 31 states have call predecessors, (85), 38 states have return successors, (105), 91 states have call predecessors, (105), 84 states have call successors, (105) [2021-12-16 03:58:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 934 transitions. [2021-12-16 03:58:26,663 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 934 transitions. Word has length 116 [2021-12-16 03:58:26,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:58:26,664 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 934 transitions. [2021-12-16 03:58:26,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:58:26,665 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 934 transitions. [2021-12-16 03:58:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-16 03:58:26,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:26,666 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:58:26,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 03:58:26,667 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:26,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:26,667 INFO L85 PathProgramCache]: Analyzing trace with hash -161811319, now seen corresponding path program 1 times [2021-12-16 03:58:26,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:26,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844900562] [2021-12-16 03:58:26,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:26,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:26,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:26,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:58:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:26,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:58:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:26,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:58:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:26,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:58:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:26,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:27,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:27,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:58:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:27,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 03:58:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 03:58:27,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:27,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844900562] [2021-12-16 03:58:27,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844900562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:58:27,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:58:27,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 03:58:27,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655949760] [2021-12-16 03:58:27,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:58:27,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:58:27,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:27,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:58:27,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:58:27,218 INFO L87 Difference]: Start difference. First operand 664 states and 934 transitions. Second operand has 19 states, 18 states have (on average 4.944444444444445) internal successors, (89), 12 states have internal predecessors, (89), 4 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 03:58:28,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:58:28,243 INFO L93 Difference]: Finished difference Result 1386 states and 1981 transitions. [2021-12-16 03:58:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 03:58:28,247 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.944444444444445) internal successors, (89), 12 states have internal predecessors, (89), 4 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2021-12-16 03:58:28,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:58:28,251 INFO L225 Difference]: With dead ends: 1386 [2021-12-16 03:58:28,251 INFO L226 Difference]: Without dead ends: 755 [2021-12-16 03:58:28,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-12-16 03:58:28,253 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 164 mSDsluCounter, 5376 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 5788 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 03:58:28,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 5788 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 03:58:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-12-16 03:58:28,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 668. [2021-12-16 03:58:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 544 states have (on average 1.375) internal successors, (748), 543 states have internal predecessors, (748), 85 states have call successors, (85), 31 states have call predecessors, (85), 38 states have return successors, (105), 93 states have call predecessors, (105), 84 states have call successors, (105) [2021-12-16 03:58:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 938 transitions. [2021-12-16 03:58:28,273 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 938 transitions. Word has length 116 [2021-12-16 03:58:28,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:58:28,274 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 938 transitions. [2021-12-16 03:58:28,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.944444444444445) internal successors, (89), 12 states have internal predecessors, (89), 4 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 03:58:28,274 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 938 transitions. [2021-12-16 03:58:28,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-16 03:58:28,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:28,276 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:58:28,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 03:58:28,276 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:28,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:28,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1915934418, now seen corresponding path program 1 times [2021-12-16 03:58:28,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:28,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327960687] [2021-12-16 03:58:28,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:28,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:28,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:28,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:58:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:28,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:58:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:28,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:58:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:28,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:58:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:28,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 03:58:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:28,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-16 03:58:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:28,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:28,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-16 03:58:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:28,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 03:58:28,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:28,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327960687] [2021-12-16 03:58:28,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327960687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:58:28,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:58:28,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:58:28,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779532694] [2021-12-16 03:58:28,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:58:28,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:58:28,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:28,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:58:28,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:58:28,441 INFO L87 Difference]: Start difference. First operand 668 states and 938 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-16 03:58:29,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:58:29,049 INFO L93 Difference]: Finished difference Result 1067 states and 1523 transitions. [2021-12-16 03:58:29,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:58:29,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 121 [2021-12-16 03:58:29,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:58:29,052 INFO L225 Difference]: With dead ends: 1067 [2021-12-16 03:58:29,052 INFO L226 Difference]: Without dead ends: 741 [2021-12-16 03:58:29,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-16 03:58:29,054 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 257 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 03:58:29,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 1428 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 03:58:29,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-12-16 03:58:29,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 670. [2021-12-16 03:58:29,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 546 states have (on average 1.3736263736263736) internal successors, (750), 545 states have internal predecessors, (750), 85 states have call successors, (85), 31 states have call predecessors, (85), 38 states have return successors, (105), 93 states have call predecessors, (105), 84 states have call successors, (105) [2021-12-16 03:58:29,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 940 transitions. [2021-12-16 03:58:29,077 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 940 transitions. Word has length 121 [2021-12-16 03:58:29,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:58:29,077 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 940 transitions. [2021-12-16 03:58:29,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-16 03:58:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 940 transitions. [2021-12-16 03:58:29,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-16 03:58:29,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:29,079 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:58:29,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 03:58:29,080 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:29,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:29,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1115994769, now seen corresponding path program 1 times [2021-12-16 03:58:29,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:29,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701192452] [2021-12-16 03:58:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:29,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:29,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:29,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:58:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:29,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:58:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:29,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:58:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:29,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:58:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:29,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 03:58:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:29,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-16 03:58:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:29,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:29,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-16 03:58:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:29,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 03:58:29,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:29,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701192452] [2021-12-16 03:58:29,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701192452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:58:29,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:58:29,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-16 03:58:29,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917249454] [2021-12-16 03:58:29,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:58:29,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 03:58:29,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:29,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 03:58:29,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-16 03:58:29,269 INFO L87 Difference]: Start difference. First operand 670 states and 940 transitions. Second operand has 12 states, 11 states have (on average 8.636363636363637) internal successors, (95), 7 states have internal predecessors, (95), 4 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 03:58:30,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:58:30,876 INFO L93 Difference]: Finished difference Result 1415 states and 2001 transitions. [2021-12-16 03:58:30,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 03:58:30,877 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 8.636363636363637) internal successors, (95), 7 states have internal predecessors, (95), 4 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 123 [2021-12-16 03:58:30,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:58:30,879 INFO L225 Difference]: With dead ends: 1415 [2021-12-16 03:58:30,880 INFO L226 Difference]: Without dead ends: 778 [2021-12-16 03:58:30,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2021-12-16 03:58:30,881 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 880 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 2320 SdHoareTripleChecker+Invalid, 2019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-16 03:58:30,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [917 Valid, 2320 Invalid, 2019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-16 03:58:30,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-12-16 03:58:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 688. [2021-12-16 03:58:30,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 558 states have (on average 1.3620071684587813) internal successors, (760), 558 states have internal predecessors, (760), 88 states have call successors, (88), 33 states have call predecessors, (88), 41 states have return successors, (106), 96 states have call predecessors, (106), 87 states have call successors, (106) [2021-12-16 03:58:30,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 954 transitions. [2021-12-16 03:58:30,902 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 954 transitions. Word has length 123 [2021-12-16 03:58:30,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:58:30,902 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 954 transitions. [2021-12-16 03:58:30,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 8.636363636363637) internal successors, (95), 7 states have internal predecessors, (95), 4 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 03:58:30,903 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 954 transitions. [2021-12-16 03:58:30,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-16 03:58:30,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:30,904 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:58:30,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 03:58:30,905 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:30,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:30,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1527207652, now seen corresponding path program 1 times [2021-12-16 03:58:30,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:30,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348502549] [2021-12-16 03:58:30,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:30,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:30,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:30,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:30,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:58:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:30,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:58:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:30,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:58:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:58:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:58:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 03:58:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-16 03:58:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-16 03:58:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-16 03:58:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-16 03:58:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 03:58:31,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:31,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348502549] [2021-12-16 03:58:31,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348502549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:58:31,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:58:31,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 03:58:31,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691541411] [2021-12-16 03:58:31,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:58:31,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:58:31,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:31,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:58:31,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:58:31,071 INFO L87 Difference]: Start difference. First operand 688 states and 954 transitions. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 03:58:31,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:58:31,659 INFO L93 Difference]: Finished difference Result 1617 states and 2297 transitions. [2021-12-16 03:58:31,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:58:31,662 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 139 [2021-12-16 03:58:31,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:58:31,665 INFO L225 Difference]: With dead ends: 1617 [2021-12-16 03:58:31,665 INFO L226 Difference]: Without dead ends: 962 [2021-12-16 03:58:31,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:58:31,667 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 262 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 03:58:31,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 1559 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 03:58:31,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2021-12-16 03:58:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 684. [2021-12-16 03:58:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 556 states have (on average 1.3597122302158273) internal successors, (756), 556 states have internal predecessors, (756), 86 states have call successors, (86), 33 states have call predecessors, (86), 41 states have return successors, (104), 94 states have call predecessors, (104), 85 states have call successors, (104) [2021-12-16 03:58:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 946 transitions. [2021-12-16 03:58:31,686 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 946 transitions. Word has length 139 [2021-12-16 03:58:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:58:31,687 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 946 transitions. [2021-12-16 03:58:31,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 03:58:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 946 transitions. [2021-12-16 03:58:31,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-16 03:58:31,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:31,689 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:58:31,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 03:58:31,689 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:31,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:31,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1475201316, now seen corresponding path program 1 times [2021-12-16 03:58:31,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:31,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074553329] [2021-12-16 03:58:31,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:31,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:58:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:58:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:58:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:58:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:58:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 03:58:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-16 03:58:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-16 03:58:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-16 03:58:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-16 03:58:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 03:58:31,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:31,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074553329] [2021-12-16 03:58:31,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074553329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:58:31,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:58:31,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 03:58:31,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847859615] [2021-12-16 03:58:31,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:58:31,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:58:31,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:31,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:58:31,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:58:31,905 INFO L87 Difference]: Start difference. First operand 684 states and 946 transitions. Second operand has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-16 03:58:32,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:58:32,760 INFO L93 Difference]: Finished difference Result 1619 states and 2299 transitions. [2021-12-16 03:58:32,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 03:58:32,762 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 139 [2021-12-16 03:58:32,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:58:32,765 INFO L225 Difference]: With dead ends: 1619 [2021-12-16 03:58:32,765 INFO L226 Difference]: Without dead ends: 968 [2021-12-16 03:58:32,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-16 03:58:32,768 INFO L933 BasicCegarLoop]: 512 mSDtfsCounter, 315 mSDsluCounter, 2262 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 03:58:32,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 2774 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 03:58:32,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-12-16 03:58:32,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 692. [2021-12-16 03:58:32,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 562 states have (on average 1.3629893238434163) internal successors, (766), 564 states have internal predecessors, (766), 86 states have call successors, (86), 33 states have call predecessors, (86), 43 states have return successors, (108), 94 states have call predecessors, (108), 85 states have call successors, (108) [2021-12-16 03:58:32,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 960 transitions. [2021-12-16 03:58:32,790 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 960 transitions. Word has length 139 [2021-12-16 03:58:32,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:58:32,790 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 960 transitions. [2021-12-16 03:58:32,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-16 03:58:32,790 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 960 transitions. [2021-12-16 03:58:32,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-16 03:58:32,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:32,793 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:58:32,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 03:58:32,793 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:32,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:32,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1269181933, now seen corresponding path program 1 times [2021-12-16 03:58:32,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:32,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117264335] [2021-12-16 03:58:32,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:32,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:32,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:32,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:58:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:32,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:58:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:32,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:58:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:32,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:58:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:32,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:32,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:32,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:58:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:32,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 03:58:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:32,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-16 03:58:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:32,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-16 03:58:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:32,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-16 03:58:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:32,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-16 03:58:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 03:58:32,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:32,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117264335] [2021-12-16 03:58:32,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117264335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:58:32,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:58:32,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:58:32,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499687885] [2021-12-16 03:58:32,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:58:32,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:58:32,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:32,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:58:32,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:58:32,992 INFO L87 Difference]: Start difference. First operand 692 states and 960 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 03:58:33,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:58:33,584 INFO L93 Difference]: Finished difference Result 1429 states and 2007 transitions. [2021-12-16 03:58:33,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:58:33,584 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 140 [2021-12-16 03:58:33,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:58:33,587 INFO L225 Difference]: With dead ends: 1429 [2021-12-16 03:58:33,587 INFO L226 Difference]: Without dead ends: 770 [2021-12-16 03:58:33,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:58:33,589 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 201 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 03:58:33,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 1582 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 03:58:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-12-16 03:58:33,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 694. [2021-12-16 03:58:33,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 564 states have (on average 1.3617021276595744) internal successors, (768), 566 states have internal predecessors, (768), 86 states have call successors, (86), 33 states have call predecessors, (86), 43 states have return successors, (108), 94 states have call predecessors, (108), 85 states have call successors, (108) [2021-12-16 03:58:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 962 transitions. [2021-12-16 03:58:33,611 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 962 transitions. Word has length 140 [2021-12-16 03:58:33,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:58:33,611 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 962 transitions. [2021-12-16 03:58:33,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 03:58:33,612 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 962 transitions. [2021-12-16 03:58:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-16 03:58:33,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:33,614 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:58:33,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 03:58:33,614 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:33,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:33,614 INFO L85 PathProgramCache]: Analyzing trace with hash 316514682, now seen corresponding path program 1 times [2021-12-16 03:58:33,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:33,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854223039] [2021-12-16 03:58:33,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:33,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:33,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:33,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:58:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:33,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:58:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:33,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:58:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:33,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:58:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:33,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:33,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:33,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:58:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:33,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 03:58:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:33,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-16 03:58:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:33,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-16 03:58:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:33,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-16 03:58:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:33,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-16 03:58:33,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 03:58:33,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:33,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854223039] [2021-12-16 03:58:33,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854223039] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:58:33,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358016104] [2021-12-16 03:58:33,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:33,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:58:33,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:58:33,865 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) [2021-12-16 03:58:33,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 03:58:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:34,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1275 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 03:58:34,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:58:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 03:58:34,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:58:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 03:58:35,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358016104] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:58:35,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:58:35,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 17 [2021-12-16 03:58:35,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168115348] [2021-12-16 03:58:35,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:58:35,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 03:58:35,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:35,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 03:58:35,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-12-16 03:58:35,002 INFO L87 Difference]: Start difference. First operand 694 states and 962 transitions. Second operand has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 13 states have internal predecessors, (124), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-16 03:58:36,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:58:36,290 INFO L93 Difference]: Finished difference Result 1641 states and 2331 transitions. [2021-12-16 03:58:36,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:58:36,291 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 13 states have internal predecessors, (124), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) Word has length 141 [2021-12-16 03:58:36,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:58:36,294 INFO L225 Difference]: With dead ends: 1641 [2021-12-16 03:58:36,294 INFO L226 Difference]: Without dead ends: 980 [2021-12-16 03:58:36,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 294 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-12-16 03:58:36,296 INFO L933 BasicCegarLoop]: 513 mSDtfsCounter, 399 mSDsluCounter, 4255 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 4768 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:58:36,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 4768 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-16 03:58:36,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-12-16 03:58:36,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 698. [2021-12-16 03:58:36,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 568 states have (on average 1.3626760563380282) internal successors, (774), 570 states have internal predecessors, (774), 86 states have call successors, (86), 33 states have call predecessors, (86), 43 states have return successors, (108), 94 states have call predecessors, (108), 85 states have call successors, (108) [2021-12-16 03:58:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 968 transitions. [2021-12-16 03:58:36,318 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 968 transitions. Word has length 141 [2021-12-16 03:58:36,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:58:36,318 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 968 transitions. [2021-12-16 03:58:36,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 13 states have internal predecessors, (124), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-16 03:58:36,318 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 968 transitions. [2021-12-16 03:58:36,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-16 03:58:36,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:36,320 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:58:36,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 03:58:36,534 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,SelfDestructingSolverStorable16 [2021-12-16 03:58:36,535 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:36,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:36,535 INFO L85 PathProgramCache]: Analyzing trace with hash 558897227, now seen corresponding path program 2 times [2021-12-16 03:58:36,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:36,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135996696] [2021-12-16 03:58:36,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:36,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:36,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:36,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:58:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:36,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:58:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:36,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:58:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:36,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:58:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:36,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:36,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:36,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:58:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:36,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 03:58:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:36,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-16 03:58:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:36,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-16 03:58:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:36,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 03:58:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:36,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-16 03:58:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 03:58:36,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:36,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135996696] [2021-12-16 03:58:36,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135996696] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:58:36,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930299501] [2021-12-16 03:58:36,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:58:36,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:58:36,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:58:36,901 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) [2021-12-16 03:58:36,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:58:37,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:58:37,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:58:37,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1357 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 03:58:37,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:58:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 03:58:38,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:58:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 03:58:38,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930299501] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:58:38,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:58:38,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 18 [2021-12-16 03:58:38,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772963199] [2021-12-16 03:58:38,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:58:38,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 03:58:38,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:38,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 03:58:38,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-12-16 03:58:38,341 INFO L87 Difference]: Start difference. First operand 698 states and 968 transitions. Second operand has 18 states, 18 states have (on average 7.0) internal successors, (126), 14 states have internal predecessors, (126), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-16 03:58:39,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:58:39,793 INFO L93 Difference]: Finished difference Result 1655 states and 2353 transitions. [2021-12-16 03:58:39,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 03:58:39,794 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.0) internal successors, (126), 14 states have internal predecessors, (126), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) Word has length 142 [2021-12-16 03:58:39,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:58:39,797 INFO L225 Difference]: With dead ends: 1655 [2021-12-16 03:58:39,797 INFO L226 Difference]: Without dead ends: 990 [2021-12-16 03:58:39,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 296 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-12-16 03:58:39,799 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 385 mSDsluCounter, 5104 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 5618 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-16 03:58:39,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 5618 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-16 03:58:39,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-12-16 03:58:39,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 700. [2021-12-16 03:58:39,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 570 states have (on average 1.3649122807017544) internal successors, (778), 572 states have internal predecessors, (778), 86 states have call successors, (86), 33 states have call predecessors, (86), 43 states have return successors, (108), 94 states have call predecessors, (108), 85 states have call successors, (108) [2021-12-16 03:58:39,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 972 transitions. [2021-12-16 03:58:39,820 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 972 transitions. Word has length 142 [2021-12-16 03:58:39,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:58:39,820 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 972 transitions. [2021-12-16 03:58:39,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.0) internal successors, (126), 14 states have internal predecessors, (126), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-16 03:58:39,821 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 972 transitions. [2021-12-16 03:58:39,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-16 03:58:39,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:39,822 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:58:39,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 03:58:40,035 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,SelfDestructingSolverStorable17 [2021-12-16 03:58:40,036 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:40,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:40,036 INFO L85 PathProgramCache]: Analyzing trace with hash -517178470, now seen corresponding path program 3 times [2021-12-16 03:58:40,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:40,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342568950] [2021-12-16 03:58:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:40,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:40,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:40,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:58:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:40,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:58:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:40,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:58:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:40,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:58:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:40,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:40,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:40,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:58:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:40,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 03:58:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:40,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-16 03:58:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:40,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-16 03:58:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:40,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-16 03:58:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:40,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-16 03:58:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 03:58:40,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:40,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342568950] [2021-12-16 03:58:40,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342568950] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:58:40,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113573166] [2021-12-16 03:58:40,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 03:58:40,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:58:40,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:58:40,391 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:58:40,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:58:50,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 03:58:50,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:58:50,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 03:58:50,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:58:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 03:58:50,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:58:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 03:58:51,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113573166] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:58:51,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:58:51,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 21 [2021-12-16 03:58:51,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142728445] [2021-12-16 03:58:51,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:58:51,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 03:58:51,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:51,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 03:58:51,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-12-16 03:58:51,230 INFO L87 Difference]: Start difference. First operand 700 states and 972 transitions. Second operand has 21 states, 21 states have (on average 6.142857142857143) internal successors, (129), 17 states have internal predecessors, (129), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-16 03:58:53,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:58:53,024 INFO L93 Difference]: Finished difference Result 1667 states and 2373 transitions. [2021-12-16 03:58:53,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 03:58:53,024 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.142857142857143) internal successors, (129), 17 states have internal predecessors, (129), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) Word has length 143 [2021-12-16 03:58:53,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:58:53,028 INFO L225 Difference]: With dead ends: 1667 [2021-12-16 03:58:53,028 INFO L226 Difference]: Without dead ends: 1000 [2021-12-16 03:58:53,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 296 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2021-12-16 03:58:53,030 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 426 mSDsluCounter, 6084 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 6599 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-16 03:58:53,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 6599 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-16 03:58:53,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-12-16 03:58:53,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 702. [2021-12-16 03:58:53,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 572 states have (on average 1.367132867132867) internal successors, (782), 574 states have internal predecessors, (782), 86 states have call successors, (86), 33 states have call predecessors, (86), 43 states have return successors, (108), 94 states have call predecessors, (108), 85 states have call successors, (108) [2021-12-16 03:58:53,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 976 transitions. [2021-12-16 03:58:53,059 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 976 transitions. Word has length 143 [2021-12-16 03:58:53,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:58:53,060 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 976 transitions. [2021-12-16 03:58:53,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.142857142857143) internal successors, (129), 17 states have internal predecessors, (129), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-16 03:58:53,060 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 976 transitions. [2021-12-16 03:58:53,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-16 03:58:53,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:58:53,062 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:58:53,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 03:58:53,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:58:53,297 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:58:53,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:58:53,298 INFO L85 PathProgramCache]: Analyzing trace with hash 484213291, now seen corresponding path program 4 times [2021-12-16 03:58:53,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:58:53,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542016293] [2021-12-16 03:58:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:58:53,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:58:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:53,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:58:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:53,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:58:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:53,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:58:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:53,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:58:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:53,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:58:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:53,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:53,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:58:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:53,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:58:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:53,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 03:58:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:53,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-16 03:58:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:53,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-16 03:58:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:53,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-16 03:58:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:53,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-16 03:58:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:58:53,716 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 03:58:53,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:58:53,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542016293] [2021-12-16 03:58:53,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542016293] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:58:53,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786702781] [2021-12-16 03:58:53,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 03:58:53,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:58:53,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:58:53,718 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:58:53,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 03:58:54,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 03:58:54,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:58:54,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 1521 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 03:58:54,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:58:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 03:58:55,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:58:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 03:58:56,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786702781] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:58:56,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:58:56,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 24 [2021-12-16 03:58:56,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546050331] [2021-12-16 03:58:56,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:58:56,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 03:58:56,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:58:56,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 03:58:56,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-12-16 03:58:56,589 INFO L87 Difference]: Start difference. First operand 702 states and 976 transitions. Second operand has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 20 states have internal predecessors, (133), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-16 03:59:00,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:59:00,236 INFO L93 Difference]: Finished difference Result 1679 states and 2393 transitions. [2021-12-16 03:59:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 03:59:00,250 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 20 states have internal predecessors, (133), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) Word has length 144 [2021-12-16 03:59:00,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:59:00,254 INFO L225 Difference]: With dead ends: 1679 [2021-12-16 03:59:00,254 INFO L226 Difference]: Without dead ends: 1010 [2021-12-16 03:59:00,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 296 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-12-16 03:59:00,257 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 698 mSDsluCounter, 6638 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 7152 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-16 03:59:00,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 7152 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1743 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-16 03:59:00,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-12-16 03:59:00,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 704. [2021-12-16 03:59:00,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 574 states have (on average 1.3693379790940767) internal successors, (786), 576 states have internal predecessors, (786), 86 states have call successors, (86), 33 states have call predecessors, (86), 43 states have return successors, (108), 94 states have call predecessors, (108), 85 states have call successors, (108) [2021-12-16 03:59:00,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 980 transitions. [2021-12-16 03:59:00,281 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 980 transitions. Word has length 144 [2021-12-16 03:59:00,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:59:00,281 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 980 transitions. [2021-12-16 03:59:00,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 20 states have internal predecessors, (133), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-16 03:59:00,282 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 980 transitions. [2021-12-16 03:59:00,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-16 03:59:00,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:59:00,284 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:59:00,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 03:59:00,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:59:00,499 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:59:00,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:59:00,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1462586810, now seen corresponding path program 5 times [2021-12-16 03:59:00,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:59:00,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129828331] [2021-12-16 03:59:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:59:00,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:59:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:59:00,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:59:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:59:00,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 03:59:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:59:00,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 03:59:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:59:00,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 03:59:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:59:00,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 03:59:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:59:00,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:59:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:59:00,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:59:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:59:00,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:59:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:59:00,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 03:59:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:59:00,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-16 03:59:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:59:00,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-16 03:59:00,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:59:00,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-16 03:59:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:59:00,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-16 03:59:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:59:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 03:59:00,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:59:00,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129828331] [2021-12-16 03:59:00,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129828331] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:59:00,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575176518] [2021-12-16 03:59:00,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 03:59:00,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:59:00,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:59:00,995 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:59:00,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process