/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:18:43,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:18:43,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:18:43,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:18:43,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:18:43,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:18:43,867 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:18:43,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:18:43,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:18:43,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:18:43,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:18:43,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:18:43,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:18:43,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:18:43,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:18:43,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:18:43,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:18:43,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:18:43,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:18:43,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:18:43,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:18:43,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:18:43,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:18:43,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:18:43,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:18:43,921 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:18:43,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:18:43,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:18:43,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:18:43,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:18:43,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:18:43,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:18:43,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:18:43,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:18:43,948 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:18:43,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:18:43,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:18:43,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:18:43,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:18:43,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:18:43,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:18:43,955 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:18:43,986 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:18:43,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:18:43,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:18:43,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:18:43,989 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:18:43,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:18:43,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:18:43,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:18:43,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:18:43,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:18:43,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:18:43,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:18:43,991 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:18:43,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:18:43,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:18:43,992 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:18:43,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:18:43,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:18:43,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:18:43,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:18:43,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:18:43,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:18:43,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:18:43,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:18:43,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:18:43,995 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:18:44,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:18:44,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:18:44,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:18:44,433 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:18:44,434 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:18:44,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i [2020-12-22 13:18:44,518 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8850aab03/dd69fb3b47f445588ddd13dc937da93f/FLAG13fd3c45d [2020-12-22 13:18:45,893 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:18:45,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i [2020-12-22 13:18:45,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8850aab03/dd69fb3b47f445588ddd13dc937da93f/FLAG13fd3c45d [2020-12-22 13:18:46,054 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8850aab03/dd69fb3b47f445588ddd13dc937da93f [2020-12-22 13:18:46,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:18:46,061 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:18:46,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:18:46,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:18:46,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:18:46,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:18:46" (1/1) ... [2020-12-22 13:18:46,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cc5a937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:46, skipping insertion in model container [2020-12-22 13:18:46,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:18:46" (1/1) ... [2020-12-22 13:18:46,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:18:46,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:18:47,298 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i[183631,183644] [2020-12-22 13:18:50,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:18:50,461 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:18:50,672 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i[183631,183644] [2020-12-22 13:18:51,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:18:52,595 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:18:52,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:52 WrapperNode [2020-12-22 13:18:52,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:18:52,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:18:52,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:18:52,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:18:52,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:52" (1/1) ... [2020-12-22 13:18:52,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:52" (1/1) ... [2020-12-22 13:18:54,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:18:54,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:18:54,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:18:54,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:18:54,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:52" (1/1) ... [2020-12-22 13:18:54,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:52" (1/1) ... [2020-12-22 13:18:54,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:52" (1/1) ... [2020-12-22 13:18:54,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:52" (1/1) ... [2020-12-22 13:18:56,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:52" (1/1) ... [2020-12-22 13:18:56,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:52" (1/1) ... [2020-12-22 13:18:56,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:52" (1/1) ... [2020-12-22 13:18:57,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:18:57,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:18:57,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:18:57,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:18:57,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:18:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_reset_hw_vf [2020-12-22 13:18:57,732 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_reset_hw_vf [2020-12-22 13:18:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2020-12-22 13:18:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:18:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:18:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:18:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:18:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u16 [2020-12-22 13:18:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:18:57,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:18:57,735 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_write_posted_mbx [2020-12-22 13:18:57,736 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_write_posted_mbx [2020-12-22 13:18:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_init_hw_vf [2020-12-22 13:18:57,736 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_init_hw_vf [2020-12-22 13:18:57,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:18:57,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:18:57,737 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_poll_for_ack [2020-12-22 13:18:57,737 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_poll_for_ack [2020-12-22 13:18:57,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:18:57,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:18:57,737 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_rar_set_vf [2020-12-22 13:18:57,738 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_rar_set_vf [2020-12-22 13:18:57,738 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_check_for_link_vf [2020-12-22 13:18:57,738 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_check_for_link_vf [2020-12-22 13:18:57,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:18:57,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:18:57,738 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~~s32~0 [2020-12-22 13:18:57,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~~s32~0 [2020-12-22 13:18:57,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:18:57,739 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~~u16~0~TO~~s32~0 [2020-12-22 13:18:57,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~~u16~0~TO~~s32~0 [2020-12-22 13:18:57,739 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_poll_for_msg [2020-12-22 13:18:57,739 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_poll_for_msg [2020-12-22 13:18:57,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:18:57,739 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_read_posted_mbx [2020-12-22 13:18:57,740 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_read_posted_mbx [2020-12-22 13:18:57,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:18:57,740 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-12-22 13:19:51,375 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:19:51,376 INFO L299 CfgBuilder]: Removed 8531 assume(true) statements. [2020-12-22 13:19:51,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:19:51 BoogieIcfgContainer [2020-12-22 13:19:51,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:19:51,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:19:51,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:19:51,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:19:51,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:18:46" (1/3) ... [2020-12-22 13:19:51,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b0ddf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:19:51, skipping insertion in model container [2020-12-22 13:19:51,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:52" (2/3) ... [2020-12-22 13:19:51,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b0ddf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:19:51, skipping insertion in model container [2020-12-22 13:19:51,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:19:51" (3/3) ... [2020-12-22 13:19:51,396 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i [2020-12-22 13:19:51,403 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:19:51,411 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 13:19:51,432 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 13:19:51,487 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:19:51,488 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:19:51,488 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:19:51,488 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:19:51,488 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:19:51,488 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:19:51,488 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:19:51,489 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:19:51,597 INFO L276 IsEmpty]: Start isEmpty. Operand 8673 states. [2020-12-22 13:19:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 13:19:51,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:51,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:19:51,618 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:51,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:51,625 INFO L82 PathProgramCache]: Analyzing trace with hash -589120283, now seen corresponding path program 1 times [2020-12-22 13:19:51,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:51,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269965822] [2020-12-22 13:19:51,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:19:52,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269965822] [2020-12-22 13:19:52,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:19:52,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:19:52,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101312008] [2020-12-22 13:19:52,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:19:52,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:52,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:19:52,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:19:52,570 INFO L87 Difference]: Start difference. First operand 8673 states. Second operand 3 states. [2020-12-22 13:19:53,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:53,934 INFO L93 Difference]: Finished difference Result 17343 states and 24117 transitions. [2020-12-22 13:19:53,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:19:53,936 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-12-22 13:19:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:54,005 INFO L225 Difference]: With dead ends: 17343 [2020-12-22 13:19:54,005 INFO L226 Difference]: Without dead ends: 8512 [2020-12-22 13:19:54,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:19:54,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8512 states. [2020-12-22 13:19:54,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8512 to 8512. [2020-12-22 13:19:54,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8512 states. [2020-12-22 13:19:54,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8512 states to 8512 states and 11553 transitions. [2020-12-22 13:19:54,425 INFO L78 Accepts]: Start accepts. Automaton has 8512 states and 11553 transitions. Word has length 44 [2020-12-22 13:19:54,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:54,426 INFO L481 AbstractCegarLoop]: Abstraction has 8512 states and 11553 transitions. [2020-12-22 13:19:54,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:19:54,426 INFO L276 IsEmpty]: Start isEmpty. Operand 8512 states and 11553 transitions. [2020-12-22 13:19:54,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 13:19:54,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:54,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:19:54,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:19:54,431 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:54,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:54,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1515996053, now seen corresponding path program 1 times [2020-12-22 13:19:54,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:54,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866823729] [2020-12-22 13:19:54,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:19:54,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866823729] [2020-12-22 13:19:54,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:19:54,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:19:54,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889399052] [2020-12-22 13:19:54,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:19:54,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:54,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:19:54,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:19:54,708 INFO L87 Difference]: Start difference. First operand 8512 states and 11553 transitions. Second operand 3 states. [2020-12-22 13:19:55,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:55,655 INFO L93 Difference]: Finished difference Result 16988 states and 23063 transitions. [2020-12-22 13:19:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:19:55,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-12-22 13:19:55,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:55,707 INFO L225 Difference]: With dead ends: 16988 [2020-12-22 13:19:55,708 INFO L226 Difference]: Without dead ends: 8513 [2020-12-22 13:19:55,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:19:55,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8513 states. [2020-12-22 13:19:55,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8513 to 8513. [2020-12-22 13:19:55,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8513 states. [2020-12-22 13:19:55,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8513 states to 8513 states and 11554 transitions. [2020-12-22 13:19:55,988 INFO L78 Accepts]: Start accepts. Automaton has 8513 states and 11554 transitions. Word has length 46 [2020-12-22 13:19:55,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:55,993 INFO L481 AbstractCegarLoop]: Abstraction has 8513 states and 11554 transitions. [2020-12-22 13:19:55,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:19:55,994 INFO L276 IsEmpty]: Start isEmpty. Operand 8513 states and 11554 transitions. [2020-12-22 13:19:55,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 13:19:56,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:56,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:19:56,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:19:56,006 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:56,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:56,006 INFO L82 PathProgramCache]: Analyzing trace with hash 630270599, now seen corresponding path program 1 times [2020-12-22 13:19:56,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:56,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302183613] [2020-12-22 13:19:56,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:19:56,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302183613] [2020-12-22 13:19:56,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:19:56,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:19:56,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500901877] [2020-12-22 13:19:56,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:19:56,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:56,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:19:56,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:19:56,498 INFO L87 Difference]: Start difference. First operand 8513 states and 11554 transitions. Second operand 3 states. [2020-12-22 13:19:57,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:57,381 INFO L93 Difference]: Finished difference Result 16988 states and 23063 transitions. [2020-12-22 13:19:57,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:19:57,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2020-12-22 13:19:57,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:57,432 INFO L225 Difference]: With dead ends: 16988 [2020-12-22 13:19:57,432 INFO L226 Difference]: Without dead ends: 8515 [2020-12-22 13:19:57,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:19:57,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8515 states. [2020-12-22 13:19:57,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8515 to 8515. [2020-12-22 13:19:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8515 states. [2020-12-22 13:19:57,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8515 states to 8515 states and 11556 transitions. [2020-12-22 13:19:57,699 INFO L78 Accepts]: Start accepts. Automaton has 8515 states and 11556 transitions. Word has length 47 [2020-12-22 13:19:57,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:57,700 INFO L481 AbstractCegarLoop]: Abstraction has 8515 states and 11556 transitions. [2020-12-22 13:19:57,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:19:57,700 INFO L276 IsEmpty]: Start isEmpty. Operand 8515 states and 11556 transitions. [2020-12-22 13:19:57,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 13:19:57,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:57,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:19:57,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:19:57,704 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:57,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:57,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1248422027, now seen corresponding path program 1 times [2020-12-22 13:19:57,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:57,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377161001] [2020-12-22 13:19:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:19:58,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377161001] [2020-12-22 13:19:58,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:19:58,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:19:58,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925617680] [2020-12-22 13:19:58,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:19:58,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:58,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:19:58,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:19:58,036 INFO L87 Difference]: Start difference. First operand 8515 states and 11556 transitions. Second operand 3 states. [2020-12-22 13:19:59,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:59,868 INFO L93 Difference]: Finished difference Result 25389 states and 34480 transitions. [2020-12-22 13:19:59,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:19:59,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2020-12-22 13:19:59,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:59,948 INFO L225 Difference]: With dead ends: 25389 [2020-12-22 13:19:59,948 INFO L226 Difference]: Without dead ends: 16923 [2020-12-22 13:19:59,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:20:00,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16923 states. [2020-12-22 13:20:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16923 to 16923. [2020-12-22 13:20:00,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16923 states. [2020-12-22 13:20:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16923 states to 16923 states and 22981 transitions. [2020-12-22 13:20:00,438 INFO L78 Accepts]: Start accepts. Automaton has 16923 states and 22981 transitions. Word has length 49 [2020-12-22 13:20:00,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:00,440 INFO L481 AbstractCegarLoop]: Abstraction has 16923 states and 22981 transitions. [2020-12-22 13:20:00,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:20:00,441 INFO L276 IsEmpty]: Start isEmpty. Operand 16923 states and 22981 transitions. [2020-12-22 13:20:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 13:20:00,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:00,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:20:00,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:20:00,446 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:00,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:00,447 INFO L82 PathProgramCache]: Analyzing trace with hash 590966936, now seen corresponding path program 1 times [2020-12-22 13:20:00,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:00,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664975066] [2020-12-22 13:20:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:20:00,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664975066] [2020-12-22 13:20:00,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:00,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:20:00,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275148062] [2020-12-22 13:20:00,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:20:00,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:00,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:20:00,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:20:00,788 INFO L87 Difference]: Start difference. First operand 16923 states and 22981 transitions. Second operand 5 states. [2020-12-22 13:20:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:02,394 INFO L93 Difference]: Finished difference Result 33797 states and 45902 transitions. [2020-12-22 13:20:02,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:20:02,395 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-12-22 13:20:02,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:02,497 INFO L225 Difference]: With dead ends: 33797 [2020-12-22 13:20:02,497 INFO L226 Difference]: Without dead ends: 33791 [2020-12-22 13:20:02,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:20:02,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33791 states. [2020-12-22 13:20:03,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33791 to 33591. [2020-12-22 13:20:03,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33591 states. [2020-12-22 13:20:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33591 states to 33591 states and 45645 transitions. [2020-12-22 13:20:03,592 INFO L78 Accepts]: Start accepts. Automaton has 33591 states and 45645 transitions. Word has length 52 [2020-12-22 13:20:03,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:03,593 INFO L481 AbstractCegarLoop]: Abstraction has 33591 states and 45645 transitions. [2020-12-22 13:20:03,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:20:03,593 INFO L276 IsEmpty]: Start isEmpty. Operand 33591 states and 45645 transitions. [2020-12-22 13:20:03,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 13:20:03,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:03,654 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:20:03,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:20:03,655 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:03,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1852462552, now seen corresponding path program 1 times [2020-12-22 13:20:03,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:03,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787010393] [2020-12-22 13:20:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:03,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-12-22 13:20:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:04,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-12-22 13:20:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 13:20:04,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787010393] [2020-12-22 13:20:04,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:04,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:20:04,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319090610] [2020-12-22 13:20:04,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:20:04,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:04,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:20:04,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:20:04,269 INFO L87 Difference]: Start difference. First operand 33591 states and 45645 transitions. Second operand 4 states. [2020-12-22 13:20:35,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:35,868 INFO L93 Difference]: Finished difference Result 97231 states and 133005 transitions. [2020-12-22 13:20:35,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:20:35,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 13:20:35,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:36,172 INFO L225 Difference]: With dead ends: 97231 [2020-12-22 13:20:36,172 INFO L226 Difference]: Without dead ends: 63689 [2020-12-22 13:20:36,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:20:36,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63689 states. [2020-12-22 13:20:38,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63689 to 63183. [2020-12-22 13:20:38,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63183 states. [2020-12-22 13:20:38,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63183 states to 63183 states and 85903 transitions. [2020-12-22 13:20:38,874 INFO L78 Accepts]: Start accepts. Automaton has 63183 states and 85903 transitions. Word has length 160 [2020-12-22 13:20:38,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:38,875 INFO L481 AbstractCegarLoop]: Abstraction has 63183 states and 85903 transitions. [2020-12-22 13:20:38,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:20:38,875 INFO L276 IsEmpty]: Start isEmpty. Operand 63183 states and 85903 transitions. [2020-12-22 13:20:39,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-22 13:20:39,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:39,001 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:20:39,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:20:39,001 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:39,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:39,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1991306359, now seen corresponding path program 1 times [2020-12-22 13:20:39,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:39,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849107138] [2020-12-22 13:20:39,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:39,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-12-22 13:20:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:39,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-12-22 13:20:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 13:20:39,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849107138] [2020-12-22 13:20:39,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:39,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:20:39,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683625559] [2020-12-22 13:20:39,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:20:39,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:39,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:20:39,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:20:39,519 INFO L87 Difference]: Start difference. First operand 63183 states and 85903 transitions. Second operand 4 states. [2020-12-22 13:21:15,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:15,185 INFO L93 Difference]: Finished difference Result 170163 states and 233323 transitions. [2020-12-22 13:21:15,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:21:15,186 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 176 [2020-12-22 13:21:15,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:15,701 INFO L225 Difference]: With dead ends: 170163 [2020-12-22 13:21:15,702 INFO L226 Difference]: Without dead ends: 107029 [2020-12-22 13:21:15,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:21:15,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107029 states. [2020-12-22 13:21:19,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107029 to 106279. [2020-12-22 13:21:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106279 states. [2020-12-22 13:21:19,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106279 states to 106279 states and 145387 transitions. [2020-12-22 13:21:19,255 INFO L78 Accepts]: Start accepts. Automaton has 106279 states and 145387 transitions. Word has length 176 [2020-12-22 13:21:19,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:19,256 INFO L481 AbstractCegarLoop]: Abstraction has 106279 states and 145387 transitions. [2020-12-22 13:21:19,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:21:19,256 INFO L276 IsEmpty]: Start isEmpty. Operand 106279 states and 145387 transitions. [2020-12-22 13:21:19,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-22 13:21:19,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:19,613 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:21:19,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:21:19,614 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:19,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:19,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1894705921, now seen corresponding path program 1 times [2020-12-22 13:21:19,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:19,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193593473] [2020-12-22 13:21:19,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:19,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-12-22 13:21:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:19,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-12-22 13:21:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 13:21:20,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193593473] [2020-12-22 13:21:20,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:21:20,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:21:20,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734221619] [2020-12-22 13:21:20,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:21:20,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:21:20,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:21:20,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:21:20,124 INFO L87 Difference]: Start difference. First operand 106279 states and 145387 transitions. Second operand 4 states. [2020-12-22 13:22:13,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:22:13,196 INFO L93 Difference]: Finished difference Result 263079 states and 361727 transitions. [2020-12-22 13:22:13,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:22:13,197 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 196 [2020-12-22 13:22:13,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:22:13,967 INFO L225 Difference]: With dead ends: 263079 [2020-12-22 13:22:13,968 INFO L226 Difference]: Without dead ends: 156849 [2020-12-22 13:22:14,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:22:14,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156849 states.