/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--wireless--rtlwifi--rtl8192cu--rtl8192cu.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:25:14,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:25:14,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:25:14,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:25:14,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:25:14,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:25:14,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:25:14,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:25:14,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:25:14,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:25:14,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:25:14,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:25:14,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:25:14,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:25:14,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:25:14,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:25:14,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:25:14,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:25:14,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:25:14,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:25:14,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:25:14,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:25:14,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:25:14,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:25:14,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:25:14,942 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:25:14,942 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:25:14,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:25:14,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:25:14,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:25:14,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:25:14,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:25:14,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:25:14,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:25:14,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:25:14,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:25:14,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:25:14,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:25:14,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:25:14,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:25:14,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:25:14,964 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:25:14,996 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:25:14,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:25:14,997 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:25:14,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:25:14,998 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:25:14,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:25:14,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:25:14,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:25:14,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:25:14,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:25:14,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:25:14,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:25:15,000 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:25:15,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:25:15,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:25:15,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:25:15,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:25:15,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:25:15,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:25:15,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:25:15,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:25:15,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:25:15,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:25:15,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:25:15,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:25:15,002 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:25:15,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:25:15,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:25:15,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:25:15,382 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:25:15,382 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:25:15,383 INFO L432 ainManager$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--wireless--rtlwifi--rtl8192cu--rtl8192cu.ko-entry_point.cil.out.i [2020-12-22 13:25:15,477 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be4384266/73e39ed0c1434d1eaf9af6ecf7edea75/FLAG910006d37 [2020-12-22 13:25:16,934 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:25:16,935 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--wireless--rtlwifi--rtl8192cu--rtl8192cu.ko-entry_point.cil.out.i [2020-12-22 13:25:17,032 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be4384266/73e39ed0c1434d1eaf9af6ecf7edea75/FLAG910006d37 [2020-12-22 13:25:17,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be4384266/73e39ed0c1434d1eaf9af6ecf7edea75 [2020-12-22 13:25:17,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:25:17,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:25:17,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:25:17,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:25:17,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:25:17,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:25:17" (1/1) ... [2020-12-22 13:25:17,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c08fedf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:25:17, skipping insertion in model container [2020-12-22 13:25:17,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:25:17" (1/1) ... [2020-12-22 13:25:17,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:25:17,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:25:18,959 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--wireless--rtlwifi--rtl8192cu--rtl8192cu.ko-entry_point.cil.out.i[223980,223993] [2020-12-22 13:25:22,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:25:22,704 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:25:22,923 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--wireless--rtlwifi--rtl8192cu--rtl8192cu.ko-entry_point.cil.out.i[223980,223993] [2020-12-22 13:25:23,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:25:24,405 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:25:24,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:25:24 WrapperNode [2020-12-22 13:25:24,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:25:24,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:25:24,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:25:24,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:25:24,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:25:24" (1/1) ... [2020-12-22 13:25:24,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:25:24" (1/1) ... [2020-12-22 13:25:27,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:25:27,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:25:27,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:25:27,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:25:27,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:25:24" (1/1) ... [2020-12-22 13:25:27,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:25:24" (1/1) ... [2020-12-22 13:25:28,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:25:24" (1/1) ... [2020-12-22 13:25:28,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:25:24" (1/1) ... [2020-12-22 13:25:29,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:25:24" (1/1) ... [2020-12-22 13:25:30,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:25:24" (1/1) ... [2020-12-22 13:25:30,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:25:24" (1/1) ... [2020-12-22 13:25:30,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:25:30,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:25:30,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:25:30,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:25:30,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:25:24" (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 13:25:31,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2020-12-22 13:25:31,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:25:31,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:25:31,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:25:31,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:25:31,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u16 [2020-12-22 13:25:31,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:25:31,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:25:31,031 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2020-12-22 13:25:31,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:25:31,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:25:31,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:25:31,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:25:31,033 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u8~0~X~$Pointer$~TO~VOID [2020-12-22 13:25:31,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u8~0~X~$Pointer$~TO~VOID [2020-12-22 13:25:31,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:25:31,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:25:31,034 INFO L130 BoogieDeclarations]: Found specification of procedure rtl92cu_get_hw_reg [2020-12-22 13:25:31,034 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl92cu_get_hw_reg [2020-12-22 13:25:31,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:25:31,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:25:31,034 INFO L130 BoogieDeclarations]: Found specification of procedure rtl92cu_set_hw_reg [2020-12-22 13:25:31,035 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl92cu_set_hw_reg [2020-12-22 13:25:31,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:25:31,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u8 [2020-12-22 13:27:10,293 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:27:10,294 INFO L299 CfgBuilder]: Removed 10707 assume(true) statements. [2020-12-22 13:27:10,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:27:10 BoogieIcfgContainer [2020-12-22 13:27:10,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:27:10,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:27:10,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:27:10,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:27:10,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:25:17" (1/3) ... [2020-12-22 13:27:10,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44aa457c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:27:10, skipping insertion in model container [2020-12-22 13:27:10,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:25:24" (2/3) ... [2020-12-22 13:27:10,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44aa457c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:27:10, skipping insertion in model container [2020-12-22 13:27:10,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:27:10" (3/3) ... [2020-12-22 13:27:10,317 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--rtlwifi--rtl8192cu--rtl8192cu.ko-entry_point.cil.out.i [2020-12-22 13:27:10,323 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:27:10,348 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 13:27:10,366 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 13:27:10,436 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:27:10,437 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:27:10,437 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:27:10,437 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:27:10,437 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:27:10,437 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:27:10,437 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:27:10,437 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:27:10,616 INFO L276 IsEmpty]: Start isEmpty. Operand 14854 states. [2020-12-22 13:27:10,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 13:27:10,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:27:10,637 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:27:10,638 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:27:10,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:27:10,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1219957156, now seen corresponding path program 1 times [2020-12-22 13:27:10,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:27:10,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219630074] [2020-12-22 13:27:10,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:27:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:27:12,793 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 13:27:12,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219630074] [2020-12-22 13:27:12,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:27:12,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:27:12,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136865001] [2020-12-22 13:27:12,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:27:12,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:27:12,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:27:12,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:27:12,818 INFO L87 Difference]: Start difference. First operand 14854 states. Second operand 3 states. [2020-12-22 13:27:16,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:27:16,119 INFO L93 Difference]: Finished difference Result 29709 states and 44717 transitions. [2020-12-22 13:27:16,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:27:16,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-12-22 13:27:16,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:27:16,247 INFO L225 Difference]: With dead ends: 29709 [2020-12-22 13:27:16,247 INFO L226 Difference]: Without dead ends: 14843 [2020-12-22 13:27:16,290 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 13:27:16,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14843 states. [2020-12-22 13:27:16,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14843 to 14843. [2020-12-22 13:27:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14843 states. [2020-12-22 13:27:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14843 states to 14843 states and 22293 transitions. [2020-12-22 13:27:16,832 INFO L78 Accepts]: Start accepts. Automaton has 14843 states and 22293 transitions. Word has length 85 [2020-12-22 13:27:16,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:27:16,834 INFO L481 AbstractCegarLoop]: Abstraction has 14843 states and 22293 transitions. [2020-12-22 13:27:16,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:27:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 14843 states and 22293 transitions. [2020-12-22 13:27:16,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 13:27:16,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:27:16,843 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:27:16,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:27:16,844 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:27:16,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:27:16,845 INFO L82 PathProgramCache]: Analyzing trace with hash 765862984, now seen corresponding path program 1 times [2020-12-22 13:27:16,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:27:16,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529147636] [2020-12-22 13:27:16,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:27:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:27:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:27:18,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529147636] [2020-12-22 13:27:18,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:27:18,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:27:18,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254297175] [2020-12-22 13:27:18,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:27:18,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:27:18,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:27:18,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:27:18,080 INFO L87 Difference]: Start difference. First operand 14843 states and 22293 transitions. Second operand 3 states. [2020-12-22 13:27:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:27:21,140 INFO L93 Difference]: Finished difference Result 29587 states and 44473 transitions. [2020-12-22 13:27:21,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:27:21,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 13:27:21,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:27:21,220 INFO L225 Difference]: With dead ends: 29587 [2020-12-22 13:27:21,220 INFO L226 Difference]: Without dead ends: 14851 [2020-12-22 13:27:21,255 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 13:27:21,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14851 states. [2020-12-22 13:27:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14851 to 14851. [2020-12-22 13:27:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14851 states. [2020-12-22 13:27:21,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14851 states to 14851 states and 22301 transitions. [2020-12-22 13:27:21,665 INFO L78 Accepts]: Start accepts. Automaton has 14851 states and 22301 transitions. Word has length 91 [2020-12-22 13:27:21,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:27:21,665 INFO L481 AbstractCegarLoop]: Abstraction has 14851 states and 22301 transitions. [2020-12-22 13:27:21,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:27:21,666 INFO L276 IsEmpty]: Start isEmpty. Operand 14851 states and 22301 transitions. [2020-12-22 13:27:21,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 13:27:21,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:27:21,667 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:27:21,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:27:21,668 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:27:21,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:27:21,669 INFO L82 PathProgramCache]: Analyzing trace with hash -568043336, now seen corresponding path program 1 times [2020-12-22 13:27:21,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:27:21,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445693591] [2020-12-22 13:27:21,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:27:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:27:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:27:22,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445693591] [2020-12-22 13:27:22,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:27:22,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:27:22,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489247516] [2020-12-22 13:27:22,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:27:22,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:27:22,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:27:22,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:27:22,872 INFO L87 Difference]: Start difference. First operand 14851 states and 22301 transitions. Second operand 3 states. [2020-12-22 13:27:25,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:27:25,833 INFO L93 Difference]: Finished difference Result 29557 states and 44423 transitions. [2020-12-22 13:27:25,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:27:25,834 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2020-12-22 13:27:25,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:27:25,885 INFO L225 Difference]: With dead ends: 29557 [2020-12-22 13:27:25,886 INFO L226 Difference]: Without dead ends: 14852 [2020-12-22 13:27:25,917 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 13:27:25,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14852 states. [2020-12-22 13:27:26,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14852 to 14852. [2020-12-22 13:27:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14852 states. [2020-12-22 13:27:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14852 states to 14852 states and 22302 transitions. [2020-12-22 13:27:26,298 INFO L78 Accepts]: Start accepts. Automaton has 14852 states and 22302 transitions. Word has length 99 [2020-12-22 13:27:26,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:27:26,302 INFO L481 AbstractCegarLoop]: Abstraction has 14852 states and 22302 transitions. [2020-12-22 13:27:26,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:27:26,302 INFO L276 IsEmpty]: Start isEmpty. Operand 14852 states and 22302 transitions. [2020-12-22 13:27:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 13:27:26,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:27:26,310 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:27:26,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:27:26,311 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:27:26,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:27:26,312 INFO L82 PathProgramCache]: Analyzing trace with hash -746144632, now seen corresponding path program 1 times [2020-12-22 13:27:26,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:27:26,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599367540] [2020-12-22 13:27:26,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:27:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:27:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 13:27:27,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599367540] [2020-12-22 13:27:27,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:27:27,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:27:27,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456053025] [2020-12-22 13:27:27,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:27:27,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:27:27,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:27:27,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:27:27,402 INFO L87 Difference]: Start difference. First operand 14852 states and 22302 transitions. Second operand 3 states. [2020-12-22 13:27:30,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:27:30,595 INFO L93 Difference]: Finished difference Result 44217 states and 66491 transitions. [2020-12-22 13:27:30,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:27:30,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-12-22 13:27:30,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:27:30,682 INFO L225 Difference]: With dead ends: 44217 [2020-12-22 13:27:30,682 INFO L226 Difference]: Without dead ends: 29513 [2020-12-22 13:27:30,720 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 13:27:30,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29513 states. [2020-12-22 13:27:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29513 to 29513. [2020-12-22 13:27:31,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29513 states. [2020-12-22 13:27:31,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29513 states to 29513 states and 44369 transitions. [2020-12-22 13:27:31,832 INFO L78 Accepts]: Start accepts. Automaton has 29513 states and 44369 transitions. Word has length 100 [2020-12-22 13:27:31,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:27:31,836 INFO L481 AbstractCegarLoop]: Abstraction has 29513 states and 44369 transitions. [2020-12-22 13:27:31,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:27:31,836 INFO L276 IsEmpty]: Start isEmpty. Operand 29513 states and 44369 transitions. [2020-12-22 13:27:31,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-22 13:27:31,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:27:31,841 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:27:31,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:27:31,841 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:27:31,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:27:31,842 INFO L82 PathProgramCache]: Analyzing trace with hash 2089001243, now seen corresponding path program 1 times [2020-12-22 13:27:31,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:27:31,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134785911] [2020-12-22 13:27:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:27:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:27:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 13:27:33,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134785911] [2020-12-22 13:27:33,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:27:33,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:27:33,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669315639] [2020-12-22 13:27:33,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:27:33,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:27:33,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:27:33,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:27:33,215 INFO L87 Difference]: Start difference. First operand 29513 states and 44369 transitions. Second operand 5 states. [2020-12-22 13:27:35,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:27:35,423 INFO L93 Difference]: Finished difference Result 88241 states and 132740 transitions. [2020-12-22 13:27:35,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:27:35,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2020-12-22 13:27:35,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:27:35,625 INFO L225 Difference]: With dead ends: 88241 [2020-12-22 13:27:35,625 INFO L226 Difference]: Without dead ends: 58871 [2020-12-22 13:27:35,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:27:35,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58871 states. [2020-12-22 13:27:37,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58871 to 58871. [2020-12-22 13:27:37,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58871 states. [2020-12-22 13:27:37,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58871 states to 58871 states and 88544 transitions. [2020-12-22 13:27:37,817 INFO L78 Accepts]: Start accepts. Automaton has 58871 states and 88544 transitions. Word has length 107 [2020-12-22 13:27:37,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:27:37,821 INFO L481 AbstractCegarLoop]: Abstraction has 58871 states and 88544 transitions. [2020-12-22 13:27:37,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:27:37,822 INFO L276 IsEmpty]: Start isEmpty. Operand 58871 states and 88544 transitions. [2020-12-22 13:27:37,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 13:27:37,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:27:37,858 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:27:37,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:27:37,859 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:27:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:27:37,862 INFO L82 PathProgramCache]: Analyzing trace with hash 844332425, now seen corresponding path program 1 times [2020-12-22 13:27:37,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:27:37,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106869677] [2020-12-22 13:27:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:27:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:27:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 13:27:39,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106869677] [2020-12-22 13:27:39,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:27:39,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:27:39,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362315618] [2020-12-22 13:27:39,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:27:39,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:27:39,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:27:39,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:27:39,062 INFO L87 Difference]: Start difference. First operand 58871 states and 88544 transitions. Second operand 3 states. [2020-12-22 13:27:41,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:27:41,665 INFO L93 Difference]: Finished difference Result 174651 states and 262691 transitions. [2020-12-22 13:27:41,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:27:41,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 129 [2020-12-22 13:27:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:27:42,127 INFO L225 Difference]: With dead ends: 174651 [2020-12-22 13:27:42,128 INFO L226 Difference]: Without dead ends: 115928 [2020-12-22 13:27:42,222 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 13:27:42,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115928 states. [2020-12-22 13:27:45,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115928 to 115921. [2020-12-22 13:27:45,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115921 states. [2020-12-22 13:27:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115921 states to 115921 states and 174320 transitions. [2020-12-22 13:27:46,260 INFO L78 Accepts]: Start accepts. Automaton has 115921 states and 174320 transitions. Word has length 129 [2020-12-22 13:27:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:27:46,260 INFO L481 AbstractCegarLoop]: Abstraction has 115921 states and 174320 transitions. [2020-12-22 13:27:46,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:27:46,261 INFO L276 IsEmpty]: Start isEmpty. Operand 115921 states and 174320 transitions. [2020-12-22 13:27:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 13:27:46,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:27:46,301 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:27:46,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:27:46,302 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:27:46,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:27:46,302 INFO L82 PathProgramCache]: Analyzing trace with hash -255715210, now seen corresponding path program 1 times [2020-12-22 13:27:46,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:27:46,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644112249] [2020-12-22 13:27:46,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:27:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:27:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 13:27:47,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644112249] [2020-12-22 13:27:47,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:27:47,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:27:47,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230724473] [2020-12-22 13:27:47,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:27:47,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:27:47,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:27:47,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:27:47,553 INFO L87 Difference]: Start difference. First operand 115921 states and 174320 transitions. Second operand 4 states. [2020-12-22 13:27:55,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:27:55,547 INFO L93 Difference]: Finished difference Result 563363 states and 847955 transitions. [2020-12-22 13:27:55,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:27:55,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2020-12-22 13:27:55,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:27:56,960 INFO L225 Difference]: With dead ends: 563363 [2020-12-22 13:27:56,960 INFO L226 Difference]: Without dead ends: 447590 [2020-12-22 13:27:57,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 13:27:58,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447590 states. [2020-12-22 13:28:03,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447590 to 115929. [2020-12-22 13:28:03,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115929 states. [2020-12-22 13:28:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115929 states to 115929 states and 174328 transitions. [2020-12-22 13:28:03,601 INFO L78 Accepts]: Start accepts. Automaton has 115929 states and 174328 transitions. Word has length 148 [2020-12-22 13:28:03,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:28:03,602 INFO L481 AbstractCegarLoop]: Abstraction has 115929 states and 174328 transitions. [2020-12-22 13:28:03,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:28:03,602 INFO L276 IsEmpty]: Start isEmpty. Operand 115929 states and 174328 transitions. [2020-12-22 13:28:03,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 13:28:03,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:28:03,640 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:28:03,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:28:03,640 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:28:03,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:28:03,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1838646680, now seen corresponding path program 1 times [2020-12-22 13:28:03,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:28:03,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196822134] [2020-12-22 13:28:03,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:28:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:28:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 13:28:05,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196822134] [2020-12-22 13:28:05,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124207835] [2020-12-22 13:28:05,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:28:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:28:11,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 14057 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:28:11,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:28:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 13:28:11,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:28:11,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 13:28:11,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510646863] [2020-12-22 13:28:11,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:28:11,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:28:11,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:28:11,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:28:11,991 INFO L87 Difference]: Start difference. First operand 115929 states and 174328 transitions. Second operand 6 states. [2020-12-22 13:28:17,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:28:17,719 INFO L93 Difference]: Finished difference Result 231887 states and 348798 transitions. [2020-12-22 13:28:17,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:28:17,720 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 151 [2020-12-22 13:28:17,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:28:18,172 INFO L225 Difference]: With dead ends: 231887 [2020-12-22 13:28:18,173 INFO L226 Difference]: Without dead ends: 116063 [2020-12-22 13:28:18,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:28:18,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116063 states. [2020-12-22 13:28:22,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116063 to 116063. [2020-12-22 13:28:22,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116063 states. [2020-12-22 13:28:22,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116063 states to 116063 states and 174462 transitions. [2020-12-22 13:28:22,621 INFO L78 Accepts]: Start accepts. Automaton has 116063 states and 174462 transitions. Word has length 151 [2020-12-22 13:28:22,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:28:22,622 INFO L481 AbstractCegarLoop]: Abstraction has 116063 states and 174462 transitions. [2020-12-22 13:28:22,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:28:22,622 INFO L276 IsEmpty]: Start isEmpty. Operand 116063 states and 174462 transitions. [2020-12-22 13:28:22,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 13:28:22,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:28:22,723 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-12-22 13:28:22,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-22 13:28:22,938 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:28:22,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:28:22,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1930857508, now seen corresponding path program 2 times [2020-12-22 13:28:22,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:28:22,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206233114] [2020-12-22 13:28:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:28:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:28:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 13:28:24,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206233114] [2020-12-22 13:28:24,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858725892] [2020-12-22 13:28:24,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true