/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:21:15,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:21:15,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:21:15,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:21:15,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:21:15,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:21:15,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:21:15,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:21:15,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:21:15,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:21:15,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:21:15,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:21:15,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:21:15,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:21:15,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:21:15,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:21:15,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:21:15,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:21:15,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:21:15,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:21:15,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:21:15,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:21:16,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:21:16,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:21:16,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:21:16,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:21:16,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:21:16,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:21:16,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:21:16,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 17:21:16,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 17:21:16,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 17:21:16,015 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 17:21:16,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 17:21:16,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 17:21:16,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 17:21:16,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 17:21:16,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 17:21:16,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:21:16,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:21:16,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:21:16,024 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 17:21:16,076 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:21:16,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:21:16,081 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:21:16,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:21:16,082 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:21:16,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:21:16,082 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:21:16,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:21:16,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:21:16,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:21:16,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:21:16,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:21:16,083 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:21:16,083 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:21:16,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:21:16,084 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:21:16,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:21:16,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:21:16,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:21:16,085 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:21:16,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:21:16,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:21:16,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:21:16,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:21:16,086 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:21:16,086 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:21:16,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:21:16,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:21:16,087 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:21:16,087 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:21:16,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:21:16,451 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:21:16,457 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:21:16,459 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:21:16,460 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:21:16,461 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-08-21 17:21:16,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e9cee1eae/e427228b38004413b44cfe958c570f8a/FLAGf55973350 [2020-08-21 17:21:17,036 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:21:17,036 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-08-21 17:21:17,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e9cee1eae/e427228b38004413b44cfe958c570f8a/FLAGf55973350 [2020-08-21 17:21:17,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e9cee1eae/e427228b38004413b44cfe958c570f8a [2020-08-21 17:21:17,394 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:21:17,396 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:21:17,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:21:17,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:21:17,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:21:17,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:21:17" (1/1) ... [2020-08-21 17:21:17,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d423800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:17, skipping insertion in model container [2020-08-21 17:21:17,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:21:17" (1/1) ... [2020-08-21 17:21:17,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:21:17,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:21:17,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:21:17,926 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:21:17,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:21:18,041 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:21:18,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:18 WrapperNode [2020-08-21 17:21:18,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:21:18,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:21:18,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:21:18,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:21:18,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:18" (1/1) ... [2020-08-21 17:21:18,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:18" (1/1) ... [2020-08-21 17:21:18,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:18" (1/1) ... [2020-08-21 17:21:18,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:18" (1/1) ... [2020-08-21 17:21:18,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:18" (1/1) ... [2020-08-21 17:21:18,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:18" (1/1) ... [2020-08-21 17:21:18,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:18" (1/1) ... [2020-08-21 17:21:18,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:21:18,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:21:18,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:21:18,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:21:18,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 17:21:18,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:21:18,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:21:18,188 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-08-21 17:21:18,188 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2020-08-21 17:21:18,188 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2020-08-21 17:21:18,188 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-08-21 17:21:18,188 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-08-21 17:21:18,189 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:21:18,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:21:18,189 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-08-21 17:21:18,189 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-08-21 17:21:18,189 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-08-21 17:21:18,189 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-08-21 17:21:18,190 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-08-21 17:21:18,190 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-08-21 17:21:18,190 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-08-21 17:21:18,190 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-08-21 17:21:18,190 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-08-21 17:21:18,190 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-08-21 17:21:18,191 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-08-21 17:21:18,191 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-08-21 17:21:18,191 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-08-21 17:21:18,191 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-08-21 17:21:18,191 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-08-21 17:21:18,191 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-08-21 17:21:18,192 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-08-21 17:21:18,192 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-08-21 17:21:18,192 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-08-21 17:21:18,192 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-08-21 17:21:18,192 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-08-21 17:21:18,192 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-08-21 17:21:18,192 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-08-21 17:21:18,193 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-08-21 17:21:18,193 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-08-21 17:21:18,193 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-08-21 17:21:18,193 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-08-21 17:21:18,193 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-08-21 17:21:18,193 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-08-21 17:21:18,193 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-21 17:21:18,194 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-08-21 17:21:18,194 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-08-21 17:21:18,194 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-08-21 17:21:18,194 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-08-21 17:21:18,194 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-08-21 17:21:18,194 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-08-21 17:21:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-08-21 17:21:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-08-21 17:21:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-08-21 17:21:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 17:21:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-08-21 17:21:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-08-21 17:21:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-08-21 17:21:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-08-21 17:21:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-08-21 17:21:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-08-21 17:21:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-08-21 17:21:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-08-21 17:21:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-08-21 17:21:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-08-21 17:21:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-08-21 17:21:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-08-21 17:21:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-08-21 17:21:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-08-21 17:21:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-08-21 17:21:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-21 17:21:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-08-21 17:21:18,198 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-08-21 17:21:18,198 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-08-21 17:21:18,198 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-08-21 17:21:18,198 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-08-21 17:21:18,198 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-08-21 17:21:18,198 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-08-21 17:21:18,198 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-08-21 17:21:18,199 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-08-21 17:21:18,199 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-08-21 17:21:18,199 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-08-21 17:21:18,199 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-08-21 17:21:18,199 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-08-21 17:21:18,199 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-08-21 17:21:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-08-21 17:21:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-08-21 17:21:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-08-21 17:21:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-08-21 17:21:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-08-21 17:21:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-08-21 17:21:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-08-21 17:21:18,201 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-08-21 17:21:18,201 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-08-21 17:21:18,201 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-08-21 17:21:18,201 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-08-21 17:21:18,201 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-08-21 17:21:18,201 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-08-21 17:21:18,201 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-08-21 17:21:18,202 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-08-21 17:21:18,202 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-08-21 17:21:18,202 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-08-21 17:21:18,202 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-08-21 17:21:18,202 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-08-21 17:21:18,202 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-08-21 17:21:18,202 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-08-21 17:21:18,202 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-08-21 17:21:18,203 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-08-21 17:21:18,203 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-08-21 17:21:18,203 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-08-21 17:21:18,203 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-08-21 17:21:18,203 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-08-21 17:21:18,203 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-08-21 17:21:18,203 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-08-21 17:21:18,204 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-08-21 17:21:18,204 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-08-21 17:21:18,204 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-08-21 17:21:18,204 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 17:21:18,204 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 17:21:18,204 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 17:21:18,204 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 17:21:18,205 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 17:21:18,205 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-08-21 17:21:18,205 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 17:21:18,205 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-08-21 17:21:18,205 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-08-21 17:21:18,205 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-08-21 17:21:18,205 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-08-21 17:21:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-08-21 17:21:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-08-21 17:21:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-08-21 17:21:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-08-21 17:21:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-08-21 17:21:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-08-21 17:21:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-08-21 17:21:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:21:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2020-08-21 17:21:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2020-08-21 17:21:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-08-21 17:21:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-08-21 17:21:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:21:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:21:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 17:21:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-21 17:21:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:21:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 17:21:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 17:21:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 17:21:18,787 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:21:18,788 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 17:21:18,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:21:18 BoogieIcfgContainer [2020-08-21 17:21:18,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:21:18,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:21:18,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:21:18,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:21:18,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:21:17" (1/3) ... [2020-08-21 17:21:18,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@770fe86b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:21:18, skipping insertion in model container [2020-08-21 17:21:18,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:21:18" (2/3) ... [2020-08-21 17:21:18,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@770fe86b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:21:18, skipping insertion in model container [2020-08-21 17:21:18,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:21:18" (3/3) ... [2020-08-21 17:21:18,801 INFO L109 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-08-21 17:21:18,811 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:21:18,819 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:21:18,831 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:21:18,850 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:21:18,851 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:21:18,851 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:21:18,851 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:21:18,851 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:21:18,851 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:21:18,852 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:21:18,852 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:21:18,871 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-08-21 17:21:18,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 17:21:18,877 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:18,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:21:18,878 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:18,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:18,883 INFO L82 PathProgramCache]: Analyzing trace with hash -573637036, now seen corresponding path program 1 times [2020-08-21 17:21:18,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:18,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296508956] [2020-08-21 17:21:18,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:19,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:21:19,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296508956] [2020-08-21 17:21:19,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:21:19,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 17:21:19,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095616137] [2020-08-21 17:21:19,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:21:19,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:19,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:21:19,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:21:19,236 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 7 states. [2020-08-21 17:21:19,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:19,818 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2020-08-21 17:21:19,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:21:19,820 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-08-21 17:21:19,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:19,832 INFO L225 Difference]: With dead ends: 90 [2020-08-21 17:21:19,832 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 17:21:19,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:21:19,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 17:21:19,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-08-21 17:21:19,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 17:21:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-08-21 17:21:19,888 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 13 [2020-08-21 17:21:19,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:19,888 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-08-21 17:21:19,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:21:19,888 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-08-21 17:21:19,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 17:21:19,890 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:19,891 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] [2020-08-21 17:21:19,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:21:19,891 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:19,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:19,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1917870949, now seen corresponding path program 1 times [2020-08-21 17:21:19,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:19,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808848973] [2020-08-21 17:21:19,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:20,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:20,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:21:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:20,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:21:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:20,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 17:21:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:20,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:21:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 17:21:20,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808848973] [2020-08-21 17:21:20,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:21:20,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 17:21:20,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286583019] [2020-08-21 17:21:20,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:21:20,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:20,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:21:20,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:21:20,246 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 9 states. [2020-08-21 17:21:20,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:20,491 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-08-21 17:21:20,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:21:20,492 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-21 17:21:20,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:20,494 INFO L225 Difference]: With dead ends: 69 [2020-08-21 17:21:20,494 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 17:21:20,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:21:20,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 17:21:20,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-21 17:21:20,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 17:21:20,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-08-21 17:21:20,510 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 38 [2020-08-21 17:21:20,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:20,511 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-08-21 17:21:20,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:21:20,511 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-08-21 17:21:20,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 17:21:20,512 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:20,513 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 17:21:20,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:21:20,513 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:20,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:20,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1624467942, now seen corresponding path program 1 times [2020-08-21 17:21:20,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:20,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159841432] [2020-08-21 17:21:20,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:20,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:20,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:21:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:20,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:21:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:20,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 17:21:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:20,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:21:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 17:21:20,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159841432] [2020-08-21 17:21:20,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:21:20,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 17:21:20,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150150933] [2020-08-21 17:21:20,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:21:20,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:20,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:21:20,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:21:20,948 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 9 states. [2020-08-21 17:21:21,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:21,171 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-08-21 17:21:21,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:21:21,172 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-21 17:21:21,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:21,174 INFO L225 Difference]: With dead ends: 71 [2020-08-21 17:21:21,174 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 17:21:21,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:21:21,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 17:21:21,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-08-21 17:21:21,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 17:21:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-08-21 17:21:21,185 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 38 [2020-08-21 17:21:21,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:21,185 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-08-21 17:21:21,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:21:21,186 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-08-21 17:21:21,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 17:21:21,187 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:21,187 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] [2020-08-21 17:21:21,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:21:21,188 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:21,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:21,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1655487749, now seen corresponding path program 1 times [2020-08-21 17:21:21,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:21,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967280682] [2020-08-21 17:21:21,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:21,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:21,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:21:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:21,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:21:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:21,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 17:21:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:21,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:21:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 17:21:21,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967280682] [2020-08-21 17:21:21,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:21:21,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 17:21:21,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943497343] [2020-08-21 17:21:21,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 17:21:21,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:21,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 17:21:21,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-08-21 17:21:21,505 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 15 states. [2020-08-21 17:21:22,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:22,442 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-08-21 17:21:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 17:21:22,443 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-08-21 17:21:22,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:22,445 INFO L225 Difference]: With dead ends: 77 [2020-08-21 17:21:22,445 INFO L226 Difference]: Without dead ends: 74 [2020-08-21 17:21:22,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2020-08-21 17:21:22,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-21 17:21:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2020-08-21 17:21:22,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-21 17:21:22,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-08-21 17:21:22,469 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 38 [2020-08-21 17:21:22,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:22,470 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-08-21 17:21:22,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 17:21:22,472 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-08-21 17:21:22,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 17:21:22,474 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:22,474 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 17:21:22,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:21:22,474 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:22,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:22,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1321471087, now seen corresponding path program 1 times [2020-08-21 17:21:22,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:22,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774651336] [2020-08-21 17:21:22,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:22,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:22,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:21:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:22,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:21:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:22,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 17:21:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:22,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:21:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:22,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:21:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 17:21:22,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774651336] [2020-08-21 17:21:22,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:21:22,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 17:21:22,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932456548] [2020-08-21 17:21:22,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 17:21:22,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:22,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 17:21:22,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-08-21 17:21:22,919 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 22 states. [2020-08-21 17:21:24,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:24,198 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-08-21 17:21:24,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 17:21:24,199 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-08-21 17:21:24,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:24,203 INFO L225 Difference]: With dead ends: 80 [2020-08-21 17:21:24,203 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 17:21:24,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 17:21:24,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 17:21:24,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-08-21 17:21:24,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 17:21:24,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-08-21 17:21:24,220 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 45 [2020-08-21 17:21:24,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:24,221 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-08-21 17:21:24,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 17:21:24,221 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-08-21 17:21:24,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 17:21:24,223 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:24,223 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 17:21:24,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:21:24,223 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:24,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:24,224 INFO L82 PathProgramCache]: Analyzing trace with hash 512124461, now seen corresponding path program 1 times [2020-08-21 17:21:24,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:24,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872915020] [2020-08-21 17:21:24,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:24,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:24,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:21:24,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:24,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:21:24,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:24,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 17:21:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:24,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:21:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:24,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:21:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 17:21:24,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872915020] [2020-08-21 17:21:24,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:21:24,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 17:21:24,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860139087] [2020-08-21 17:21:24,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 17:21:24,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:24,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 17:21:24,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-08-21 17:21:24,478 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 16 states. [2020-08-21 17:21:25,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:25,231 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-08-21 17:21:25,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 17:21:25,231 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-08-21 17:21:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:25,234 INFO L225 Difference]: With dead ends: 79 [2020-08-21 17:21:25,234 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 17:21:25,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2020-08-21 17:21:25,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 17:21:25,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 17:21:25,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 17:21:25,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-08-21 17:21:25,259 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 45 [2020-08-21 17:21:25,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:25,260 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-08-21 17:21:25,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 17:21:25,260 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-08-21 17:21:25,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 17:21:25,261 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:25,262 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-08-21 17:21:25,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:21:25,266 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:25,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:25,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1069126843, now seen corresponding path program 1 times [2020-08-21 17:21:25,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:25,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643350587] [2020-08-21 17:21:25,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:25,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:25,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:21:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:25,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:21:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:25,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 17:21:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:25,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:21:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:25,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:21:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:25,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 17:21:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:25,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 17:21:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 17:21:25,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643350587] [2020-08-21 17:21:25,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:21:25,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 17:21:25,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441318977] [2020-08-21 17:21:25,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 17:21:25,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:25,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 17:21:25,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-08-21 17:21:25,683 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 23 states. [2020-08-21 17:21:26,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:26,835 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-08-21 17:21:26,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 17:21:26,835 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-08-21 17:21:26,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:26,838 INFO L225 Difference]: With dead ends: 74 [2020-08-21 17:21:26,838 INFO L226 Difference]: Without dead ends: 71 [2020-08-21 17:21:26,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=1238, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 17:21:26,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-21 17:21:26,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-08-21 17:21:26,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 17:21:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-08-21 17:21:26,851 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 57 [2020-08-21 17:21:26,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:26,855 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-08-21 17:21:26,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 17:21:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-08-21 17:21:26,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 17:21:26,856 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:26,859 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-08-21 17:21:26,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:21:26,859 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:26,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:26,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1878473469, now seen corresponding path program 1 times [2020-08-21 17:21:26,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:26,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700681189] [2020-08-21 17:21:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:26,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:26,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:21:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:26,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:21:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:27,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 17:21:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:27,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:21:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:27,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:21:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:27,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 17:21:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:27,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 17:21:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 17:21:27,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700681189] [2020-08-21 17:21:27,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:21:27,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 17:21:27,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348474583] [2020-08-21 17:21:27,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 17:21:27,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:27,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 17:21:27,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-08-21 17:21:27,259 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 22 states. [2020-08-21 17:21:28,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:28,294 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-21 17:21:28,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 17:21:28,294 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2020-08-21 17:21:28,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:28,297 INFO L225 Difference]: With dead ends: 84 [2020-08-21 17:21:28,297 INFO L226 Difference]: Without dead ends: 71 [2020-08-21 17:21:28,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 17:21:28,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-21 17:21:28,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-08-21 17:21:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 17:21:28,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-08-21 17:21:28,309 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 57 [2020-08-21 17:21:28,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:28,309 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-08-21 17:21:28,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 17:21:28,310 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-08-21 17:21:28,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 17:21:28,311 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:28,311 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-08-21 17:21:28,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:21:28,312 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:28,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:28,312 INFO L82 PathProgramCache]: Analyzing trace with hash 482320829, now seen corresponding path program 1 times [2020-08-21 17:21:28,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:28,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464625480] [2020-08-21 17:21:28,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:28,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:28,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:21:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:28,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:21:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:28,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 17:21:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:28,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:21:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:28,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:21:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:28,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 17:21:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:28,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 17:21:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-21 17:21:28,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464625480] [2020-08-21 17:21:28,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:21:28,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 17:21:28,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934377844] [2020-08-21 17:21:28,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:21:28,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:28,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:21:28,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:21:28,496 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 10 states. [2020-08-21 17:21:28,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:28,932 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-08-21 17:21:28,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:21:28,933 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-08-21 17:21:28,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:28,934 INFO L225 Difference]: With dead ends: 81 [2020-08-21 17:21:28,935 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 17:21:28,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-08-21 17:21:28,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 17:21:28,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-21 17:21:28,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 17:21:28,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-08-21 17:21:28,945 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 57 [2020-08-21 17:21:28,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:28,945 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-08-21 17:21:28,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:21:28,946 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-08-21 17:21:28,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 17:21:28,947 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:28,947 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-08-21 17:21:28,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:21:28,948 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:28,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:28,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1291667455, now seen corresponding path program 1 times [2020-08-21 17:21:28,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:28,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511485430] [2020-08-21 17:21:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:29,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:21:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:29,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:21:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:29,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:21:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:29,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 17:21:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:29,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:21:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:29,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:21:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:29,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 17:21:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:29,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 17:21:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:21:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-21 17:21:29,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511485430] [2020-08-21 17:21:29,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:21:29,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 17:21:29,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243873758] [2020-08-21 17:21:29,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 17:21:29,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:21:29,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 17:21:29,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-08-21 17:21:29,240 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 18 states. [2020-08-21 17:21:30,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:21:30,101 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2020-08-21 17:21:30,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 17:21:30,101 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-08-21 17:21:30,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:21:30,104 INFO L225 Difference]: With dead ends: 93 [2020-08-21 17:21:30,104 INFO L226 Difference]: Without dead ends: 82 [2020-08-21 17:21:30,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 17:21:30,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-21 17:21:30,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2020-08-21 17:21:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 17:21:30,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-08-21 17:21:30,117 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 57 [2020-08-21 17:21:30,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:21:30,118 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-08-21 17:21:30,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 17:21:30,118 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-08-21 17:21:30,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-21 17:21:30,119 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:21:30,119 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2020-08-21 17:21:30,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 17:21:30,120 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:21:30,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:21:30,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1118751113, now seen corresponding path program 1 times [2020-08-21 17:21:30,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:21:30,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371243599] [2020-08-21 17:21:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:21:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 17:21:30,168 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 17:21:30,170 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 17:21:30,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 17:21:30,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:21:30 BoogieIcfgContainer [2020-08-21 17:21:30,199 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:21:30,202 INFO L168 Benchmark]: Toolchain (without parser) took 12805.05 ms. Allocated memory was 146.8 MB in the beginning and 363.9 MB in the end (delta: 217.1 MB). Free memory was 102.2 MB in the beginning and 327.6 MB in the end (delta: -225.4 MB). Peak memory consumption was 202.4 MB. Max. memory is 7.1 GB. [2020-08-21 17:21:30,203 INFO L168 Benchmark]: CDTParser took 0.52 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 17:21:30,208 INFO L168 Benchmark]: CACSL2BoogieTranslator took 645.18 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 102.0 MB in the beginning and 166.7 MB in the end (delta: -64.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. [2020-08-21 17:21:30,209 INFO L168 Benchmark]: Boogie Preprocessor took 73.78 ms. Allocated memory is still 202.9 MB. Free memory was 166.7 MB in the beginning and 164.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-21 17:21:30,210 INFO L168 Benchmark]: RCFGBuilder took 676.16 ms. Allocated memory is still 202.9 MB. Free memory was 164.0 MB in the beginning and 118.3 MB in the end (delta: 45.7 MB). Peak memory consumption was 45.7 MB. Max. memory is 7.1 GB. [2020-08-21 17:21:30,211 INFO L168 Benchmark]: TraceAbstraction took 11405.20 ms. Allocated memory was 202.9 MB in the beginning and 363.9 MB in the end (delta: 161.0 MB). Free memory was 117.6 MB in the beginning and 327.6 MB in the end (delta: -209.9 MB). Peak memory consumption was 161.7 MB. Max. memory is 7.1 GB. [2020-08-21 17:21:30,221 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 645.18 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 102.0 MB in the beginning and 166.7 MB in the end (delta: -64.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 73.78 ms. Allocated memory is still 202.9 MB. Free memory was 166.7 MB in the beginning and 164.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 676.16 ms. Allocated memory is still 202.9 MB. Free memory was 164.0 MB in the beginning and 118.3 MB in the end (delta: 45.7 MB). Peak memory consumption was 45.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11405.20 ms. Allocated memory was 202.9 MB in the beginning and 363.9 MB in the end (delta: 161.0 MB). Free memory was 117.6 MB in the beginning and 327.6 MB in the end (delta: -209.9 MB). Peak memory consumption was 161.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L867] void * guard_malloc_counter = 0; [L887] struct list_head *elem = ((void *)0); [L900] static struct list_head head; [L903] struct list_head *dev1, *dev2; [L904] CALL, EXPR my_malloc(sizeof(*dev1)) [L879] CALL, EXPR __getMemory(size) [L871] (size > 0) ? (0) : __blast_assert () [L872] guard_malloc_counter++ [L873] COND FALSE !(!__VERIFIER_nondet_int()) [L875] return (void *) guard_malloc_counter; [L879] RET, EXPR __getMemory(size) [L879] return __getMemory(size); [L904] RET, EXPR my_malloc(sizeof(*dev1)) [L904] dev1 = my_malloc(sizeof(*dev1)) [L905] CALL, EXPR my_malloc(sizeof(*dev2)) [L879] CALL, EXPR __getMemory(size) [L871] (size > 0) ? (0) : __blast_assert () [L872] guard_malloc_counter++ [L873] COND FALSE !(!__VERIFIER_nondet_int()) [L875] return (void *) guard_malloc_counter; [L879] RET, EXPR __getMemory(size) [L879] return __getMemory(size); [L905] RET, EXPR my_malloc(sizeof(*dev2)) [L905] dev2 = my_malloc(sizeof(*dev2)) [L906] COND TRUE dev1!=((void *)0) && dev2!=((void *)0) [L907] CALL list_add(dev2, &head) [L890] (new!=elem) ? (0) : __blast_assert () [L891] COND TRUE __VERIFIER_nondet_int() [L892] elem = new [L907] RET list_add(dev2, &head) [L908] CALL list_add(dev1, &head) [L890] (new!=elem) ? (0) : __blast_assert () [L891] COND TRUE __VERIFIER_nondet_int() [L892] elem = new [L908] RET list_add(dev1, &head) [L909] CALL list_del(dev2) [L896] COND FALSE !(entry==elem) [L909] RET list_del(dev2) [L910] CALL list_add(dev2, &head) [L890] (new!=elem) ? (0) : __blast_assert () [L891] COND FALSE !(__VERIFIER_nondet_int()) [L910] RET list_add(dev2, &head) [L913] CALL list_add(dev1, &head) [L890] (new!=elem) ? (0) : __blast_assert () [L890] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.3s, OverallIterations: 11, TraceHistogramMax: 4, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 375 SDtfs, 460 SDslu, 963 SDs, 0 SdLazy, 5200 SolverSat, 537 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 339 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 48 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 509 NumberOfCodeBlocks, 509 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 435 ConstructedInterpolants, 0 QuantifiedInterpolants, 89234 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 90/143 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...