./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.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 739f3451e6066963c0b7569760000f821b0e10d41a2bb279dc204ee3e2cd1a3e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 16:42:10,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 16:42:10,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 16:42:10,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 16:42:10,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 16:42:10,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 16:42:10,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 16:42:10,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 16:42:10,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 16:42:10,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 16:42:10,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 16:42:10,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 16:42:10,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 16:42:10,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 16:42:10,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 16:42:10,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 16:42:10,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 16:42:10,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 16:42:10,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 16:42:10,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 16:42:10,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 16:42:10,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 16:42:10,988 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 16:42:10,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 16:42:10,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 16:42:10,993 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 16:42:10,993 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 16:42:10,995 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 16:42:10,995 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 16:42:10,996 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 16:42:10,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 16:42:10,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 16:42:10,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 16:42:10,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 16:42:10,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 16:42:10,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 16:42:11,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 16:42:11,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 16:42:11,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 16:42:11,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 16:42:11,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 16:42:11,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 16:42:11,028 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 16:42:11,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 16:42:11,029 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 16:42:11,029 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 16:42:11,029 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 16:42:11,030 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 16:42:11,030 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 16:42:11,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 16:42:11,030 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 16:42:11,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 16:42:11,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 16:42:11,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 16:42:11,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 16:42:11,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 16:42:11,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 16:42:11,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 16:42:11,032 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 16:42:11,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 16:42:11,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 16:42:11,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 16:42:11,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 16:42:11,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:42:11,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 16:42:11,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 16:42:11,033 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 16:42:11,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 16:42:11,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 16:42:11,034 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 16:42:11,034 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 16:42:11,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 16:42:11,034 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 16:42:11,034 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739f3451e6066963c0b7569760000f821b0e10d41a2bb279dc204ee3e2cd1a3e [2021-12-21 16:42:11,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 16:42:11,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 16:42:11,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 16:42:11,218 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 16:42:11,218 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 16:42:11,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i [2021-12-21 16:42:11,258 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9aac872e6/507196e4234c482582d8edd2f63aa1b3/FLAG51d386425 [2021-12-21 16:42:11,818 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 16:42:11,818 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i [2021-12-21 16:42:11,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9aac872e6/507196e4234c482582d8edd2f63aa1b3/FLAG51d386425 [2021-12-21 16:42:11,991 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9aac872e6/507196e4234c482582d8edd2f63aa1b3 [2021-12-21 16:42:11,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 16:42:11,994 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 16:42:11,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 16:42:11,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 16:42:12,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 16:42:12,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:42:11" (1/1) ... [2021-12-21 16:42:12,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3050b679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:42:12, skipping insertion in model container [2021-12-21 16:42:12,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:42:11" (1/1) ... [2021-12-21 16:42:12,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 16:42:12,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 16:42:13,320 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-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i[284626,284639] [2021-12-21 16:42:13,372 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:42:13,397 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 16:42:13,645 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-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i[284626,284639] [2021-12-21 16:42:13,655 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:42:13,695 INFO L208 MainTranslator]: Completed translation [2021-12-21 16:42:13,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:42:13 WrapperNode [2021-12-21 16:42:13,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 16:42:13,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 16:42:13,698 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 16:42:13,698 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 16:42:13,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:42:13" (1/1) ... [2021-12-21 16:42:13,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:42:13" (1/1) ... [2021-12-21 16:42:13,870 INFO L137 Inliner]: procedures = 228, calls = 2012, calls flagged for inlining = 106, calls inlined = 86, statements flattened = 2889 [2021-12-21 16:42:13,870 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 16:42:13,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 16:42:13,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 16:42:13,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 16:42:13,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:42:13" (1/1) ... [2021-12-21 16:42:13,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:42:13" (1/1) ... [2021-12-21 16:42:13,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:42:13" (1/1) ... [2021-12-21 16:42:13,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:42:13" (1/1) ... [2021-12-21 16:42:13,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:42:13" (1/1) ... [2021-12-21 16:42:13,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:42:13" (1/1) ... [2021-12-21 16:42:13,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:42:13" (1/1) ... [2021-12-21 16:42:14,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 16:42:14,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 16:42:14,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 16:42:14,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 16:42:14,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:42:13" (1/1) ... [2021-12-21 16:42:14,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:42:14,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:42:14,039 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) [2021-12-21 16:42:14,045 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 [2021-12-21 16:42:14,065 INFO L130 BoogieDeclarations]: Found specification of procedure insb [2021-12-21 16:42:14,066 INFO L138 BoogieDeclarations]: Found implementation of procedure insb [2021-12-21 16:42:14,066 INFO L130 BoogieDeclarations]: Found specification of procedure WriteW6692 [2021-12-21 16:42:14,066 INFO L138 BoogieDeclarations]: Found implementation of procedure WriteW6692 [2021-12-21 16:42:14,066 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_clear_bchannel [2021-12-21 16:42:14,066 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_clear_bchannel [2021-12-21 16:42:14,066 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-21 16:42:14,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-21 16:42:14,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-12-21 16:42:14,067 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-12-21 16:42:14,067 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-12-21 16:42:14,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-12-21 16:42:14,067 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-21 16:42:14,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-21 16:42:14,067 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_unregister_device [2021-12-21 16:42:14,067 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_unregister_device [2021-12-21 16:42:14,068 INFO L130 BoogieDeclarations]: Found specification of procedure ReadW6692 [2021-12-21 16:42:14,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadW6692 [2021-12-21 16:42:14,068 INFO L130 BoogieDeclarations]: Found specification of procedure W6692B_interrupt [2021-12-21 16:42:14,068 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692B_interrupt [2021-12-21 16:42:14,068 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-12-21 16:42:14,068 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-12-21 16:42:14,068 INFO L130 BoogieDeclarations]: Found specification of procedure outsb [2021-12-21 16:42:14,068 INFO L138 BoogieDeclarations]: Found implementation of procedure outsb [2021-12-21 16:42:14,069 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-21 16:42:14,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-21 16:42:14,069 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 16:42:14,069 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 16:42:14,069 INFO L130 BoogieDeclarations]: Found specification of procedure W6692_empty_Bfifo [2021-12-21 16:42:14,069 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692_empty_Bfifo [2021-12-21 16:42:14,069 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-12-21 16:42:14,070 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-12-21 16:42:14,070 INFO L130 BoogieDeclarations]: Found specification of procedure W6692_fill_Bfifo [2021-12-21 16:42:14,070 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692_fill_Bfifo [2021-12-21 16:42:14,070 INFO L130 BoogieDeclarations]: Found specification of procedure ReadW6692B [2021-12-21 16:42:14,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadW6692B [2021-12-21 16:42:14,070 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-12-21 16:42:14,070 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-12-21 16:42:14,070 INFO L130 BoogieDeclarations]: Found specification of procedure W6692_empty_Dfifo [2021-12-21 16:42:14,071 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692_empty_Dfifo [2021-12-21 16:42:14,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 16:42:14,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 16:42:14,071 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-12-21 16:42:14,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-12-21 16:42:14,071 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-21 16:42:14,071 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-21 16:42:14,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 16:42:14,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 16:42:14,072 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-12-21 16:42:14,072 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-12-21 16:42:14,072 INFO L130 BoogieDeclarations]: Found specification of procedure w6692_led_handler [2021-12-21 16:42:14,072 INFO L138 BoogieDeclarations]: Found implementation of procedure w6692_led_handler [2021-12-21 16:42:14,072 INFO L130 BoogieDeclarations]: Found specification of procedure send_next [2021-12-21 16:42:14,072 INFO L138 BoogieDeclarations]: Found implementation of procedure send_next [2021-12-21 16:42:14,073 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-12-21 16:42:14,073 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-12-21 16:42:14,073 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-12-21 16:42:14,073 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-12-21 16:42:14,073 INFO L130 BoogieDeclarations]: Found specification of procedure WriteW6692B [2021-12-21 16:42:14,073 INFO L138 BoogieDeclarations]: Found implementation of procedure WriteW6692B [2021-12-21 16:42:14,073 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freebchannel [2021-12-21 16:42:14,074 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freebchannel [2021-12-21 16:42:14,074 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freedchannel [2021-12-21 16:42:14,074 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freedchannel [2021-12-21 16:42:14,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 16:42:14,074 INFO L130 BoogieDeclarations]: Found specification of procedure ph_command [2021-12-21 16:42:14,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ph_command [2021-12-21 16:42:14,074 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-12-21 16:42:14,074 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-12-21 16:42:14,075 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2021-12-21 16:42:14,075 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2021-12-21 16:42:14,075 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-12-21 16:42:14,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-12-21 16:42:14,075 INFO L130 BoogieDeclarations]: Found specification of procedure _set_debug [2021-12-21 16:42:14,075 INFO L138 BoogieDeclarations]: Found implementation of procedure _set_debug [2021-12-21 16:42:14,075 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-12-21 16:42:14,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-12-21 16:42:14,076 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-21 16:42:14,076 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-21 16:42:14,076 INFO L130 BoogieDeclarations]: Found specification of procedure print_hex_dump [2021-12-21 16:42:14,076 INFO L138 BoogieDeclarations]: Found implementation of procedure print_hex_dump [2021-12-21 16:42:14,076 INFO L130 BoogieDeclarations]: Found specification of procedure disable_hwirq [2021-12-21 16:42:14,076 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_hwirq [2021-12-21 16:42:14,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 16:42:14,077 INFO L130 BoogieDeclarations]: Found specification of procedure w6692_probe [2021-12-21 16:42:14,077 INFO L138 BoogieDeclarations]: Found implementation of procedure w6692_probe [2021-12-21 16:42:14,077 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2021-12-21 16:42:14,077 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2021-12-21 16:42:14,077 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_drvdata [2021-12-21 16:42:14,077 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_drvdata [2021-12-21 16:42:14,077 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-21 16:42:14,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-21 16:42:14,078 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-12-21 16:42:14,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-12-21 16:42:14,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 16:42:14,078 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-12-21 16:42:14,078 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-12-21 16:42:14,078 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_3 [2021-12-21 16:42:14,078 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_3 [2021-12-21 16:42:14,079 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-12-21 16:42:14,079 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-12-21 16:42:14,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 16:42:14,079 INFO L130 BoogieDeclarations]: Found specification of procedure recv_Bchannel [2021-12-21 16:42:14,079 INFO L138 BoogieDeclarations]: Found implementation of procedure recv_Bchannel [2021-12-21 16:42:14,079 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_lock_irqsave [2021-12-21 16:42:14,079 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_lock_irqsave [2021-12-21 16:42:14,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 16:42:14,080 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-12-21 16:42:14,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-12-21 16:42:14,080 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_3 [2021-12-21 16:42:14,080 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_3 [2021-12-21 16:42:14,080 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_unlock_irqrestore [2021-12-21 16:42:14,080 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_unlock_irqrestore [2021-12-21 16:42:14,080 INFO L130 BoogieDeclarations]: Found specification of procedure W6692_fill_Dfifo [2021-12-21 16:42:14,080 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692_fill_Dfifo [2021-12-21 16:42:14,081 INFO L130 BoogieDeclarations]: Found specification of procedure w6692_mode [2021-12-21 16:42:14,081 INFO L138 BoogieDeclarations]: Found implementation of procedure w6692_mode [2021-12-21 16:42:14,081 INFO L130 BoogieDeclarations]: Found specification of procedure get_next_dframe [2021-12-21 16:42:14,081 INFO L138 BoogieDeclarations]: Found implementation of procedure get_next_dframe [2021-12-21 16:42:14,081 INFO L130 BoogieDeclarations]: Found specification of procedure mI_alloc_skb [2021-12-21 16:42:14,081 INFO L138 BoogieDeclarations]: Found implementation of procedure mI_alloc_skb [2021-12-21 16:42:14,081 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-12-21 16:42:14,082 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-12-21 16:42:14,082 INFO L130 BoogieDeclarations]: Found specification of procedure l1_event [2021-12-21 16:42:14,082 INFO L138 BoogieDeclarations]: Found implementation of procedure l1_event [2021-12-21 16:42:14,082 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-12-21 16:42:14,082 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-12-21 16:42:14,082 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2021-12-21 16:42:14,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2021-12-21 16:42:14,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 16:42:14,083 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2021-12-21 16:42:14,083 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2021-12-21 16:42:14,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 16:42:14,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 16:42:14,552 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 16:42:14,554 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 16:42:15,432 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-21 16:42:16,706 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 16:42:16,724 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 16:42:16,724 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 16:42:16,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:42:16 BoogieIcfgContainer [2021-12-21 16:42:16,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 16:42:16,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 16:42:16,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 16:42:16,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 16:42:16,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:42:11" (1/3) ... [2021-12-21 16:42:16,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47e5c3f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:42:16, skipping insertion in model container [2021-12-21 16:42:16,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:42:13" (2/3) ... [2021-12-21 16:42:16,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47e5c3f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:42:16, skipping insertion in model container [2021-12-21 16:42:16,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:42:16" (3/3) ... [2021-12-21 16:42:16,734 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i [2021-12-21 16:42:16,738 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 16:42:16,738 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 16:42:16,787 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 16:42:16,792 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 [2021-12-21 16:42:16,792 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 16:42:16,828 INFO L276 IsEmpty]: Start isEmpty. Operand has 1007 states, 679 states have (on average 1.337260677466863) internal successors, (908), 713 states have internal predecessors, (908), 266 states have call successors, (266), 61 states have call predecessors, (266), 60 states have return successors, (260), 254 states have call predecessors, (260), 260 states have call successors, (260) [2021-12-21 16:42:16,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 16:42:16,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:42:16,836 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:42:16,836 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:42:16,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:42:16,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1333373833, now seen corresponding path program 1 times [2021-12-21 16:42:16,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:42:16,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74726401] [2021-12-21 16:42:16,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:42:16,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:42:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:17,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:42:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:17,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:17,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:17,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:42:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:17,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:17,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:17,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 16:42:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:17,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:17,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-21 16:42:17,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:42:17,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74726401] [2021-12-21 16:42:17,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74726401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:42:17,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:42:17,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 16:42:17,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018593516] [2021-12-21 16:42:17,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:42:17,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:42:17,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:42:17,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:42:17,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:42:17,389 INFO L87 Difference]: Start difference. First operand has 1007 states, 679 states have (on average 1.337260677466863) internal successors, (908), 713 states have internal predecessors, (908), 266 states have call successors, (266), 61 states have call predecessors, (266), 60 states have return successors, (260), 254 states have call predecessors, (260), 260 states have call successors, (260) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 16:42:19,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:42:19,875 INFO L93 Difference]: Finished difference Result 2036 states and 2922 transitions. [2021-12-21 16:42:19,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 16:42:19,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 63 [2021-12-21 16:42:19,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:42:19,891 INFO L225 Difference]: With dead ends: 2036 [2021-12-21 16:42:19,891 INFO L226 Difference]: Without dead ends: 1017 [2021-12-21 16:42:19,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:42:19,906 INFO L933 BasicCegarLoop]: 1384 mSDtfsCounter, 173 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 2692 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 16:42:19,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 2692 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-21 16:42:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-12-21 16:42:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 990. [2021-12-21 16:42:19,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 670 states have (on average 1.326865671641791) internal successors, (889), 696 states have internal predecessors, (889), 260 states have call successors, (260), 60 states have call predecessors, (260), 59 states have return successors, (259), 253 states have call predecessors, (259), 259 states have call successors, (259) [2021-12-21 16:42:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1408 transitions. [2021-12-21 16:42:19,992 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1408 transitions. Word has length 63 [2021-12-21 16:42:19,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:42:19,993 INFO L470 AbstractCegarLoop]: Abstraction has 990 states and 1408 transitions. [2021-12-21 16:42:19,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 16:42:19,993 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1408 transitions. [2021-12-21 16:42:19,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 16:42:19,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:42:20,000 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:42:20,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 16:42:20,000 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:42:20,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:42:20,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1007049039, now seen corresponding path program 1 times [2021-12-21 16:42:20,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:42:20,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950176370] [2021-12-21 16:42:20,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:42:20,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:42:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:20,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:42:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:20,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:20,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:20,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:42:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:20,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:20,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:20,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 16:42:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:20,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:20,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-21 16:42:20,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:42:20,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950176370] [2021-12-21 16:42:20,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950176370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:42:20,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:42:20,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:42:20,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756268579] [2021-12-21 16:42:20,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:42:20,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:42:20,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:42:20,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:42:20,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:42:20,250 INFO L87 Difference]: Start difference. First operand 990 states and 1408 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 16:42:22,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:42:22,443 INFO L93 Difference]: Finished difference Result 2658 states and 3786 transitions. [2021-12-21 16:42:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:42:22,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 63 [2021-12-21 16:42:22,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:42:22,457 INFO L225 Difference]: With dead ends: 2658 [2021-12-21 16:42:22,457 INFO L226 Difference]: Without dead ends: 1677 [2021-12-21 16:42:22,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:42:22,466 INFO L933 BasicCegarLoop]: 1553 mSDtfsCounter, 1293 mSDsluCounter, 1939 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 917 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1432 SdHoareTripleChecker+Valid, 3492 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 917 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:42:22,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1432 Valid, 3492 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [917 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 16:42:22,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2021-12-21 16:42:22,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1624. [2021-12-21 16:42:22,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1110 states have (on average 1.3423423423423424) internal successors, (1490), 1160 states have internal predecessors, (1490), 413 states have call successors, (413), 101 states have call predecessors, (413), 100 states have return successors, (412), 400 states have call predecessors, (412), 412 states have call successors, (412) [2021-12-21 16:42:22,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2315 transitions. [2021-12-21 16:42:22,550 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2315 transitions. Word has length 63 [2021-12-21 16:42:22,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:42:22,550 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 2315 transitions. [2021-12-21 16:42:22,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 16:42:22,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2315 transitions. [2021-12-21 16:42:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 16:42:22,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:42:22,555 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-21 16:42:22,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 16:42:22,555 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:42:22,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:42:22,556 INFO L85 PathProgramCache]: Analyzing trace with hash -303802206, now seen corresponding path program 1 times [2021-12-21 16:42:22,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:42:22,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830608041] [2021-12-21 16:42:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:42:22,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:42:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:22,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:42:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:22,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:22,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:22,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:42:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:22,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:22,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:22,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 16:42:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:22,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:22,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:22,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 16:42:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:22,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:22,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-21 16:42:22,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:42:22,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830608041] [2021-12-21 16:42:22,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830608041] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:42:22,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:42:22,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:42:22,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866704043] [2021-12-21 16:42:22,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:42:22,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:42:22,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:42:22,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:42:22,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:42:22,813 INFO L87 Difference]: Start difference. First operand 1624 states and 2315 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 16:42:24,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:42:24,983 INFO L93 Difference]: Finished difference Result 3279 states and 4680 transitions. [2021-12-21 16:42:24,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:42:24,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 93 [2021-12-21 16:42:24,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:42:25,006 INFO L225 Difference]: With dead ends: 3279 [2021-12-21 16:42:25,007 INFO L226 Difference]: Without dead ends: 1673 [2021-12-21 16:42:25,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:42:25,019 INFO L933 BasicCegarLoop]: 1362 mSDtfsCounter, 171 mSDsluCounter, 2528 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 3890 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:42:25,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 3890 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 16:42:25,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2021-12-21 16:42:25,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1624. [2021-12-21 16:42:25,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1110 states have (on average 1.3414414414414415) internal successors, (1489), 1160 states have internal predecessors, (1489), 413 states have call successors, (413), 101 states have call predecessors, (413), 100 states have return successors, (412), 400 states have call predecessors, (412), 412 states have call successors, (412) [2021-12-21 16:42:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2314 transitions. [2021-12-21 16:42:25,069 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2314 transitions. Word has length 93 [2021-12-21 16:42:25,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:42:25,070 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 2314 transitions. [2021-12-21 16:42:25,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 16:42:25,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2314 transitions. [2021-12-21 16:42:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-21 16:42:25,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:42:25,075 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-12-21 16:42:25,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 16:42:25,076 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:42:25,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:42:25,076 INFO L85 PathProgramCache]: Analyzing trace with hash -822775061, now seen corresponding path program 1 times [2021-12-21 16:42:25,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:42:25,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108475087] [2021-12-21 16:42:25,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:42:25,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:42:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:25,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:42:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:25,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:25,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:25,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:42:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:25,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:25,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:25,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 16:42:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:25,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:25,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:25,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 16:42:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:25,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:25,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:25,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-21 16:42:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:25,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:25,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:25,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-12-21 16:42:25,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:42:25,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108475087] [2021-12-21 16:42:25,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108475087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:42:25,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:42:25,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:42:25,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446736336] [2021-12-21 16:42:25,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:42:25,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:42:25,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:42:25,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:42:25,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:42:25,386 INFO L87 Difference]: Start difference. First operand 1624 states and 2314 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 16:42:27,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:42:27,446 INFO L93 Difference]: Finished difference Result 1712 states and 2419 transitions. [2021-12-21 16:42:27,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:42:27,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2021-12-21 16:42:27,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:42:27,454 INFO L225 Difference]: With dead ends: 1712 [2021-12-21 16:42:27,454 INFO L226 Difference]: Without dead ends: 1709 [2021-12-21 16:42:27,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:42:27,456 INFO L933 BasicCegarLoop]: 1376 mSDtfsCounter, 556 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 3508 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:42:27,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 3508 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 16:42:27,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2021-12-21 16:42:27,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1658. [2021-12-21 16:42:27,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1133 states have (on average 1.3353927625772286) internal successors, (1513), 1183 states have internal predecessors, (1513), 416 states have call successors, (416), 109 states have call predecessors, (416), 108 states have return successors, (415), 403 states have call predecessors, (415), 415 states have call successors, (415) [2021-12-21 16:42:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2344 transitions. [2021-12-21 16:42:27,497 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2344 transitions. Word has length 110 [2021-12-21 16:42:27,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:42:27,498 INFO L470 AbstractCegarLoop]: Abstraction has 1658 states and 2344 transitions. [2021-12-21 16:42:27,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 16:42:27,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2344 transitions. [2021-12-21 16:42:27,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 16:42:27,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:42:27,500 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 16:42:27,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 16:42:27,500 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:42:27,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:42:27,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1844805629, now seen corresponding path program 1 times [2021-12-21 16:42:27,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:42:27,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477306436] [2021-12-21 16:42:27,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:42:27,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:42:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:27,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:42:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:27,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:27,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:27,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:42:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:27,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:27,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:27,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 16:42:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:27,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:27,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:27,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 16:42:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:27,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 16:42:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:27,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:27,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 16:42:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:27,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 16:42:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 16:42:27,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:42:27,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477306436] [2021-12-21 16:42:27,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477306436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:42:27,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:42:27,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 16:42:27,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390945971] [2021-12-21 16:42:27,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:42:27,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 16:42:27,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:42:27,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 16:42:27,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:42:27,742 INFO L87 Difference]: Start difference. First operand 1658 states and 2344 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 16:42:32,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:42:32,981 INFO L93 Difference]: Finished difference Result 5090 states and 7224 transitions. [2021-12-21 16:42:32,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 16:42:32,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 111 [2021-12-21 16:42:32,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:42:32,997 INFO L225 Difference]: With dead ends: 5090 [2021-12-21 16:42:32,998 INFO L226 Difference]: Without dead ends: 3455 [2021-12-21 16:42:33,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-12-21 16:42:33,005 INFO L933 BasicCegarLoop]: 1444 mSDtfsCounter, 2326 mSDsluCounter, 4312 mSDsCounter, 0 mSdLazyCounter, 4319 mSolverCounterSat, 1569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2576 SdHoareTripleChecker+Valid, 5756 SdHoareTripleChecker+Invalid, 5888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1569 IncrementalHoareTripleChecker+Valid, 4319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:42:33,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2576 Valid, 5756 Invalid, 5888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1569 Valid, 4319 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-21 16:42:33,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3455 states. [2021-12-21 16:42:33,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3455 to 3338. [2021-12-21 16:42:33,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 2276 states have (on average 1.3339191564147628) internal successors, (3036), 2378 states have internal predecessors, (3036), 844 states have call successors, (844), 216 states have call predecessors, (844), 217 states have return successors, (850), 819 states have call predecessors, (850), 843 states have call successors, (850) [2021-12-21 16:42:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 4730 transitions. [2021-12-21 16:42:33,109 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 4730 transitions. Word has length 111 [2021-12-21 16:42:33,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:42:33,111 INFO L470 AbstractCegarLoop]: Abstraction has 3338 states and 4730 transitions. [2021-12-21 16:42:33,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 16:42:33,111 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 4730 transitions. [2021-12-21 16:42:33,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-21 16:42:33,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:42:33,113 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 16:42:33,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 16:42:33,114 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:42:33,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:42:33,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1092190682, now seen corresponding path program 1 times [2021-12-21 16:42:33,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:42:33,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869143029] [2021-12-21 16:42:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:42:33,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:42:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:33,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:42:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:33,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:33,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:33,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:42:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:33,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:33,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:33,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 16:42:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:33,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:33,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:33,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 16:42:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:33,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 16:42:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:33,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:33,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 16:42:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:33,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-21 16:42:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 16:42:33,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:42:33,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869143029] [2021-12-21 16:42:33,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869143029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:42:33,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:42:33,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 16:42:33,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455858520] [2021-12-21 16:42:33,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:42:33,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 16:42:33,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:42:33,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 16:42:33,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:42:33,360 INFO L87 Difference]: Start difference. First operand 3338 states and 4730 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 16:42:38,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:42:38,464 INFO L93 Difference]: Finished difference Result 10212 states and 14494 transitions. [2021-12-21 16:42:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 16:42:38,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2021-12-21 16:42:38,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:42:38,497 INFO L225 Difference]: With dead ends: 10212 [2021-12-21 16:42:38,497 INFO L226 Difference]: Without dead ends: 6897 [2021-12-21 16:42:38,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-12-21 16:42:38,513 INFO L933 BasicCegarLoop]: 1441 mSDtfsCounter, 2326 mSDsluCounter, 4312 mSDsCounter, 0 mSdLazyCounter, 4314 mSolverCounterSat, 1572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2575 SdHoareTripleChecker+Valid, 5753 SdHoareTripleChecker+Invalid, 5886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1572 IncrementalHoareTripleChecker+Valid, 4314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-21 16:42:38,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2575 Valid, 5753 Invalid, 5886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1572 Valid, 4314 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-21 16:42:38,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6897 states. [2021-12-21 16:42:38,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6897 to 6666. [2021-12-21 16:42:38,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6666 states, 4548 states have (on average 1.3326737027264732) internal successors, (6061), 4752 states have internal predecessors, (6061), 1682 states have call successors, (1682), 432 states have call predecessors, (1682), 435 states have return successors, (1707), 1633 states have call predecessors, (1707), 1681 states have call successors, (1707) [2021-12-21 16:42:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6666 states to 6666 states and 9450 transitions. [2021-12-21 16:42:38,771 INFO L78 Accepts]: Start accepts. Automaton has 6666 states and 9450 transitions. Word has length 109 [2021-12-21 16:42:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:42:38,773 INFO L470 AbstractCegarLoop]: Abstraction has 6666 states and 9450 transitions. [2021-12-21 16:42:38,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 16:42:38,773 INFO L276 IsEmpty]: Start isEmpty. Operand 6666 states and 9450 transitions. [2021-12-21 16:42:38,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-21 16:42:38,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:42:38,775 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 16:42:38,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 16:42:38,775 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:42:38,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:42:38,776 INFO L85 PathProgramCache]: Analyzing trace with hash -510546839, now seen corresponding path program 1 times [2021-12-21 16:42:38,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:42:38,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792094648] [2021-12-21 16:42:38,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:42:38,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:42:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:38,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:42:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:38,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:38,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:38,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:42:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:38,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:38,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:38,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 16:42:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:38,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:38,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:38,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:38,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:42:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:38,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 16:42:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:38,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:38,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 16:42:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:38,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-21 16:42:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 16:42:38,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:42:38,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792094648] [2021-12-21 16:42:38,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792094648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:42:38,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:42:38,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 16:42:38,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299275350] [2021-12-21 16:42:38,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:42:38,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 16:42:38,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:42:38,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 16:42:38,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:42:38,970 INFO L87 Difference]: Start difference. First operand 6666 states and 9450 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 16:42:43,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:42:43,946 INFO L93 Difference]: Finished difference Result 20446 states and 29007 transitions. [2021-12-21 16:42:43,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 16:42:43,947 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 110 [2021-12-21 16:42:43,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:42:44,001 INFO L225 Difference]: With dead ends: 20446 [2021-12-21 16:42:44,002 INFO L226 Difference]: Without dead ends: 13803 [2021-12-21 16:42:44,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-12-21 16:42:44,023 INFO L933 BasicCegarLoop]: 1373 mSDtfsCounter, 2319 mSDsluCounter, 4063 mSDsCounter, 0 mSdLazyCounter, 4298 mSolverCounterSat, 1636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2568 SdHoareTripleChecker+Valid, 5436 SdHoareTripleChecker+Invalid, 5934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1636 IncrementalHoareTripleChecker+Valid, 4298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-21 16:42:44,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2568 Valid, 5436 Invalid, 5934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1636 Valid, 4298 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-21 16:42:44,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13803 states. [2021-12-21 16:42:44,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13803 to 13344. [2021-12-21 16:42:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13344 states, 9110 states have (on average 1.3313940724478595) internal successors, (12129), 9518 states have internal predecessors, (12129), 3358 states have call successors, (3358), 868 states have call predecessors, (3358), 875 states have return successors, (3438), 3261 states have call predecessors, (3438), 3357 states have call successors, (3438) [2021-12-21 16:42:44,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13344 states to 13344 states and 18925 transitions. [2021-12-21 16:42:44,507 INFO L78 Accepts]: Start accepts. Automaton has 13344 states and 18925 transitions. Word has length 110 [2021-12-21 16:42:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:42:44,507 INFO L470 AbstractCegarLoop]: Abstraction has 13344 states and 18925 transitions. [2021-12-21 16:42:44,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 16:42:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 13344 states and 18925 transitions. [2021-12-21 16:42:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-21 16:42:44,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:42:44,510 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 16:42:44,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 16:42:44,510 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:42:44,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:42:44,511 INFO L85 PathProgramCache]: Analyzing trace with hash -641074778, now seen corresponding path program 1 times [2021-12-21 16:42:44,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:42:44,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673262177] [2021-12-21 16:42:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:42:44,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:42:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:44,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:42:44,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:44,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:44,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:44,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:42:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:44,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:44,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:44,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 16:42:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:44,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:44,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:44,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 16:42:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:44,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 16:42:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:44,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:44,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-21 16:42:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:44,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-21 16:42:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 16:42:44,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:42:44,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673262177] [2021-12-21 16:42:44,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673262177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:42:44,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:42:44,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 16:42:44,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513032400] [2021-12-21 16:42:44,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:42:44,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 16:42:44,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:42:44,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 16:42:44,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:42:44,690 INFO L87 Difference]: Start difference. First operand 13344 states and 18925 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 16:42:50,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:42:50,246 INFO L93 Difference]: Finished difference Result 39837 states and 56483 transitions. [2021-12-21 16:42:50,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 16:42:50,247 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 108 [2021-12-21 16:42:50,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:42:50,352 INFO L225 Difference]: With dead ends: 39837 [2021-12-21 16:42:50,352 INFO L226 Difference]: Without dead ends: 26516 [2021-12-21 16:42:50,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-12-21 16:42:50,407 INFO L933 BasicCegarLoop]: 2063 mSDtfsCounter, 2100 mSDsluCounter, 4776 mSDsCounter, 0 mSdLazyCounter, 4460 mSolverCounterSat, 1662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2350 SdHoareTripleChecker+Valid, 6839 SdHoareTripleChecker+Invalid, 6122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1662 IncrementalHoareTripleChecker+Valid, 4460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-21 16:42:50,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2350 Valid, 6839 Invalid, 6122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1662 Valid, 4460 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-21 16:42:50,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26516 states. [2021-12-21 16:42:51,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26516 to 25443. [2021-12-21 16:42:51,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25443 states, 17362 states have (on average 1.3309526552240525) internal successors, (23108), 18170 states have internal predecessors, (23108), 6403 states have call successors, (6403), 1662 states have call predecessors, (6403), 1677 states have return successors, (6631), 6182 states have call predecessors, (6631), 6402 states have call successors, (6631) [2021-12-21 16:42:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25443 states to 25443 states and 36142 transitions. [2021-12-21 16:42:51,224 INFO L78 Accepts]: Start accepts. Automaton has 25443 states and 36142 transitions. Word has length 108 [2021-12-21 16:42:51,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:42:51,224 INFO L470 AbstractCegarLoop]: Abstraction has 25443 states and 36142 transitions. [2021-12-21 16:42:51,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 16:42:51,224 INFO L276 IsEmpty]: Start isEmpty. Operand 25443 states and 36142 transitions. [2021-12-21 16:42:51,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-21 16:42:51,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:42:51,226 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:42:51,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 16:42:51,227 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:42:51,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:42:51,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1433760259, now seen corresponding path program 1 times [2021-12-21 16:42:51,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:42:51,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144933022] [2021-12-21 16:42:51,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:42:51,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:42:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:51,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:42:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:51,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:51,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:51,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:42:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:51,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:51,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:51,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 16:42:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:51,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:51,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:51,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 16:42:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:51,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-21 16:42:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:51,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 16:42:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:51,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:51,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-21 16:42:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:51,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-21 16:42:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-21 16:42:51,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:42:51,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144933022] [2021-12-21 16:42:51,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144933022] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:42:51,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090371162] [2021-12-21 16:42:51,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:42:51,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:42:51,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:42:51,615 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) [2021-12-21 16:42:51,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 16:42:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:52,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 3034 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 16:42:52,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:42:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 16:42:52,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:42:52,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090371162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:42:52,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:42:52,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2021-12-21 16:42:52,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029325357] [2021-12-21 16:42:52,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:42:52,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:42:52,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:42:52,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:42:52,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-12-21 16:42:52,496 INFO L87 Difference]: Start difference. First operand 25443 states and 36142 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 16:42:53,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:42:53,459 INFO L93 Difference]: Finished difference Result 63403 states and 90066 transitions. [2021-12-21 16:42:53,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 16:42:53,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 121 [2021-12-21 16:42:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:42:53,743 INFO L225 Difference]: With dead ends: 63403 [2021-12-21 16:42:53,743 INFO L226 Difference]: Without dead ends: 37983 [2021-12-21 16:42:53,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-12-21 16:42:53,826 INFO L933 BasicCegarLoop]: 2308 mSDtfsCounter, 1429 mSDsluCounter, 10623 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1433 SdHoareTripleChecker+Valid, 12931 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:42:53,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1433 Valid, 12931 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 16:42:53,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37983 states. [2021-12-21 16:42:55,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37983 to 33770. [2021-12-21 16:42:55,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33770 states, 23105 states have (on average 1.3281973598788142) internal successors, (30688), 24133 states have internal predecessors, (30688), 8428 states have call successors, (8428), 2197 states have call predecessors, (8428), 2236 states have return successors, (8863), 8153 states have call predecessors, (8863), 8427 states have call successors, (8863) [2021-12-21 16:42:55,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33770 states to 33770 states and 47979 transitions. [2021-12-21 16:42:55,628 INFO L78 Accepts]: Start accepts. Automaton has 33770 states and 47979 transitions. Word has length 121 [2021-12-21 16:42:55,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:42:55,629 INFO L470 AbstractCegarLoop]: Abstraction has 33770 states and 47979 transitions. [2021-12-21 16:42:55,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 16:42:55,630 INFO L276 IsEmpty]: Start isEmpty. Operand 33770 states and 47979 transitions. [2021-12-21 16:42:55,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-21 16:42:55,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:42:55,632 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:42:55,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 16:42:55,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:42:55,847 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:42:55,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:42:55,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1146089900, now seen corresponding path program 1 times [2021-12-21 16:42:55,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:42:55,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916666363] [2021-12-21 16:42:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:42:55,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:42:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:55,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:42:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:55,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:55,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:56,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:42:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:56,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:56,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:56,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 16:42:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:56,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:56,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:42:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:56,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 16:42:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:56,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 16:42:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:56,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 16:42:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:56,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:42:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:56,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-21 16:42:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:56,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-21 16:42:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 16:42:56,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:42:56,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916666363] [2021-12-21 16:42:56,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916666363] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:42:56,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173486349] [2021-12-21 16:42:56,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:42:56,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:42:56,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:42:56,106 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) [2021-12-21 16:42:56,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 16:42:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:42:56,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 3036 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 16:42:56,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:42:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 16:42:57,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:42:57,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173486349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:42:57,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:42:57,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2021-12-21 16:42:57,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336599759] [2021-12-21 16:42:57,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:42:57,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:42:57,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:42:57,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:42:57,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-12-21 16:42:57,084 INFO L87 Difference]: Start difference. First operand 33770 states and 47979 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 16:42:58,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:42:58,353 INFO L93 Difference]: Finished difference Result 84081 states and 119456 transitions. [2021-12-21 16:42:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 16:42:58,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 122 [2021-12-21 16:42:58,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:42:58,570 INFO L225 Difference]: With dead ends: 84081 [2021-12-21 16:42:58,570 INFO L226 Difference]: Without dead ends: 50334 [2021-12-21 16:42:58,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-12-21 16:42:58,665 INFO L933 BasicCegarLoop]: 2385 mSDtfsCounter, 1429 mSDsluCounter, 10919 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1433 SdHoareTripleChecker+Valid, 13304 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:42:58,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1433 Valid, 13304 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 16:42:58,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50334 states. [2021-12-21 16:42:59,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50334 to 42137. [2021-12-21 16:42:59,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42137 states, 28872 states have (on average 1.326267664172901) internal successors, (38292), 30144 states have internal predecessors, (38292), 10453 states have call successors, (10453), 2732 states have call predecessors, (10453), 2811 states have return successors, (11103), 10116 states have call predecessors, (11103), 10452 states have call successors, (11103) [2021-12-21 16:43:00,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42137 states to 42137 states and 59848 transitions. [2021-12-21 16:43:00,152 INFO L78 Accepts]: Start accepts. Automaton has 42137 states and 59848 transitions. Word has length 122 [2021-12-21 16:43:00,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:43:00,153 INFO L470 AbstractCegarLoop]: Abstraction has 42137 states and 59848 transitions. [2021-12-21 16:43:00,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 16:43:00,153 INFO L276 IsEmpty]: Start isEmpty. Operand 42137 states and 59848 transitions. [2021-12-21 16:43:00,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-21 16:43:00,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:43:00,156 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:43:00,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 16:43:00,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 16:43:00,375 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:43:00,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:43:00,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1389366230, now seen corresponding path program 1 times [2021-12-21 16:43:00,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:43:00,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601297414] [2021-12-21 16:43:00,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:43:00,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:43:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:00,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:43:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:00,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:43:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:00,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:43:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:00,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:43:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:00,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:43:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:00,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:43:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:00,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 16:43:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:00,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:43:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:00,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:43:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:00,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 16:43:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:00,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 16:43:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:00,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 16:43:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:00,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:43:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:00,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-21 16:43:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:00,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-21 16:43:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 16:43:00,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:43:00,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601297414] [2021-12-21 16:43:00,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601297414] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:43:00,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23466600] [2021-12-21 16:43:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:43:00,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:43:00,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:43:00,619 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) [2021-12-21 16:43:00,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 16:43:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:01,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 3038 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 16:43:01,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:43:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 16:43:01,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:43:01,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23466600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:43:01,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:43:01,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2021-12-21 16:43:01,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87250917] [2021-12-21 16:43:01,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:43:01,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:43:01,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:43:01,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:43:01,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-12-21 16:43:01,488 INFO L87 Difference]: Start difference. First operand 42137 states and 59848 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 16:43:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:43:03,216 INFO L93 Difference]: Finished difference Result 100796 states and 143164 transitions. [2021-12-21 16:43:03,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 16:43:03,216 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 123 [2021-12-21 16:43:03,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:43:03,669 INFO L225 Difference]: With dead ends: 100796 [2021-12-21 16:43:03,670 INFO L226 Difference]: Without dead ends: 58682 [2021-12-21 16:43:03,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-12-21 16:43:03,764 INFO L933 BasicCegarLoop]: 2389 mSDtfsCounter, 1429 mSDsluCounter, 10935 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1433 SdHoareTripleChecker+Valid, 13324 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:43:03,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1433 Valid, 13324 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 16:43:03,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58682 states. [2021-12-21 16:43:05,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58682 to 42169. [2021-12-21 16:43:05,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42169 states, 28896 states have (on average 1.3259966777408638) internal successors, (38316), 30168 states have internal predecessors, (38316), 10453 states have call successors, (10453), 2732 states have call predecessors, (10453), 2819 states have return successors, (11115), 10124 states have call predecessors, (11115), 10452 states have call successors, (11115) [2021-12-21 16:43:05,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42169 states to 42169 states and 59884 transitions. [2021-12-21 16:43:05,315 INFO L78 Accepts]: Start accepts. Automaton has 42169 states and 59884 transitions. Word has length 123 [2021-12-21 16:43:05,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:43:05,315 INFO L470 AbstractCegarLoop]: Abstraction has 42169 states and 59884 transitions. [2021-12-21 16:43:05,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 16:43:05,316 INFO L276 IsEmpty]: Start isEmpty. Operand 42169 states and 59884 transitions. [2021-12-21 16:43:05,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-21 16:43:05,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:43:05,319 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:43:05,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 16:43:05,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:43:05,535 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:43:05,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:43:05,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2081669403, now seen corresponding path program 1 times [2021-12-21 16:43:05,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:43:05,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060563707] [2021-12-21 16:43:05,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:43:05,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:43:05,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:05,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:43:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:05,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:43:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:05,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:43:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:05,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:43:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:05,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:43:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:05,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:43:05,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:05,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 16:43:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:05,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:43:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:05,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:43:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:05,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 16:43:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:05,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 16:43:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:05,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 16:43:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:05,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:43:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:05,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 16:43:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:05,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 16:43:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 16:43:05,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:43:05,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060563707] [2021-12-21 16:43:05,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060563707] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:43:05,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168374908] [2021-12-21 16:43:05,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:43:05,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:43:05,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:43:05,795 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) [2021-12-21 16:43:05,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 16:43:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:43:06,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 3040 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 16:43:06,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:43:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 16:43:06,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:43:06,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168374908] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:43:06,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:43:06,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2021-12-21 16:43:06,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847804796] [2021-12-21 16:43:06,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:43:06,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:43:06,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:43:06,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:43:06,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-12-21 16:43:06,700 INFO L87 Difference]: Start difference. First operand 42169 states and 59884 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11)