/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=LOWLEXORDER --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 18:09:30,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:09:30,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:09:30,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:09:30,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:09:30,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:09:30,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:09:30,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:09:30,870 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:09:30,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:09:30,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:09:30,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:09:30,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:09:30,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:09:30,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:09:30,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:09:30,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:09:30,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:09:30,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:09:30,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:09:30,898 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:09:30,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:09:30,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:09:30,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:09:30,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:09:30,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:09:30,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:09:30,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:09:30,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:09:30,922 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:09:30,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:09:30,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:09:30,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:09:30,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:09:30,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:09:30,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:09:30,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:09:30,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:09:30,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:09:30,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:09:30,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:09:30,935 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 18:09:30,973 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:09:30,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:09:30,975 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:09:30,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:09:30,976 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:09:30,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:09:30,976 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:09:30,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:09:30,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:09:30,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:09:30,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:09:30,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:09:30,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:09:30,978 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:09:30,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:09:30,979 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:09:30,979 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:09:30,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:09:30,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:09:30,979 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:09:30,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:09:30,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:09:30,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:09:30,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:09:30,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:09:30,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:09:30,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:09:30,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:09:30,981 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:09:30,982 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=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:09:31,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:09:31,315 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:09:31,323 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:09:31,325 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:09:31,328 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:09:31,329 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-08-21 18:09:31,396 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73e2946ad/e0624098e1d448688fea08fd18636f86/FLAGd11d831ba [2020-08-21 18:09:31,954 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:09:31,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-08-21 18:09:31,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73e2946ad/e0624098e1d448688fea08fd18636f86/FLAGd11d831ba [2020-08-21 18:09:32,237 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73e2946ad/e0624098e1d448688fea08fd18636f86 [2020-08-21 18:09:32,245 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:09:32,246 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:09:32,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:09:32,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:09:32,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:09:32,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:09:32" (1/1) ... [2020-08-21 18:09:32,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b98f5e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:32, skipping insertion in model container [2020-08-21 18:09:32,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:09:32" (1/1) ... [2020-08-21 18:09:32,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:09:32,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:09:32,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:09:32,744 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:09:32,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:09:32,889 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:09:32,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:32 WrapperNode [2020-08-21 18:09:32,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:09:32,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:09:32,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:09:32,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:09:32,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:32" (1/1) ... [2020-08-21 18:09:32,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:32" (1/1) ... [2020-08-21 18:09:32,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:32" (1/1) ... [2020-08-21 18:09:32,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:32" (1/1) ... [2020-08-21 18:09:32,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:32" (1/1) ... [2020-08-21 18:09:32,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:32" (1/1) ... [2020-08-21 18:09:32,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:32" (1/1) ... [2020-08-21 18:09:32,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:09:32,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:09:32,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:09:32,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:09:32,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:32" (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 18:09:33,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:09:33,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:09:33,053 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-08-21 18:09:33,053 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2020-08-21 18:09:33,053 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2020-08-21 18:09:33,053 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-08-21 18:09:33,053 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-08-21 18:09:33,054 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:09:33,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:09:33,054 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-08-21 18:09:33,054 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-08-21 18:09:33,054 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-08-21 18:09:33,054 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-08-21 18:09:33,055 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-08-21 18:09:33,055 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-08-21 18:09:33,055 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-08-21 18:09:33,055 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-08-21 18:09:33,055 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-08-21 18:09:33,056 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-08-21 18:09:33,056 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-08-21 18:09:33,056 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-08-21 18:09:33,056 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-08-21 18:09:33,056 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-08-21 18:09:33,056 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-08-21 18:09:33,057 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-08-21 18:09:33,057 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-08-21 18:09:33,057 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-08-21 18:09:33,057 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-08-21 18:09:33,057 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-08-21 18:09:33,057 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-08-21 18:09:33,058 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-08-21 18:09:33,058 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-08-21 18:09:33,058 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-08-21 18:09:33,058 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-08-21 18:09:33,058 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-08-21 18:09:33,058 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-08-21 18:09:33,058 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-08-21 18:09:33,059 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-08-21 18:09:33,059 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-21 18:09:33,059 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-08-21 18:09:33,059 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-08-21 18:09:33,059 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-08-21 18:09:33,059 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-08-21 18:09:33,060 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-08-21 18:09:33,060 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-08-21 18:09:33,060 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-08-21 18:09:33,060 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-08-21 18:09:33,060 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-08-21 18:09:33,060 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 18:09:33,060 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-08-21 18:09:33,061 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-08-21 18:09:33,061 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-08-21 18:09:33,061 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-08-21 18:09:33,061 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-08-21 18:09:33,061 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-08-21 18:09:33,061 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-08-21 18:09:33,062 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-08-21 18:09:33,062 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-08-21 18:09:33,062 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-08-21 18:09:33,062 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-08-21 18:09:33,062 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-08-21 18:09:33,062 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-08-21 18:09:33,062 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-08-21 18:09:33,063 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-08-21 18:09:33,063 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-21 18:09:33,063 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-08-21 18:09:33,063 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-08-21 18:09:33,063 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-08-21 18:09:33,063 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-08-21 18:09:33,063 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-08-21 18:09:33,064 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-08-21 18:09:33,064 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-08-21 18:09:33,064 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-08-21 18:09:33,064 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-08-21 18:09:33,064 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-08-21 18:09:33,064 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-08-21 18:09:33,065 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-08-21 18:09:33,065 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-08-21 18:09:33,065 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-08-21 18:09:33,065 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-08-21 18:09:33,065 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-08-21 18:09:33,065 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-08-21 18:09:33,066 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-08-21 18:09:33,066 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-08-21 18:09:33,066 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-08-21 18:09:33,066 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-08-21 18:09:33,066 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-08-21 18:09:33,066 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-08-21 18:09:33,067 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-08-21 18:09:33,067 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-08-21 18:09:33,067 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-08-21 18:09:33,067 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-08-21 18:09:33,067 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-08-21 18:09:33,067 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-08-21 18:09:33,067 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-08-21 18:09:33,068 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-08-21 18:09:33,068 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-08-21 18:09:33,068 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-08-21 18:09:33,068 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-08-21 18:09:33,068 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-08-21 18:09:33,068 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-08-21 18:09:33,068 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-08-21 18:09:33,069 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-08-21 18:09:33,069 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-08-21 18:09:33,069 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-08-21 18:09:33,069 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-08-21 18:09:33,069 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-08-21 18:09:33,069 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-08-21 18:09:33,069 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-08-21 18:09:33,070 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-08-21 18:09:33,070 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-08-21 18:09:33,070 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 18:09:33,070 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 18:09:33,070 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 18:09:33,070 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 18:09:33,070 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 18:09:33,071 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-08-21 18:09:33,071 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 18:09:33,071 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-08-21 18:09:33,071 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-08-21 18:09:33,071 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-08-21 18:09:33,071 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-08-21 18:09:33,072 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-08-21 18:09:33,072 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-08-21 18:09:33,072 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-08-21 18:09:33,072 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-08-21 18:09:33,072 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-08-21 18:09:33,072 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-08-21 18:09:33,073 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-08-21 18:09:33,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:09:33,073 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2020-08-21 18:09:33,073 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2020-08-21 18:09:33,073 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-08-21 18:09:33,073 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-08-21 18:09:33,074 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:09:33,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:09:33,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 18:09:33,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-21 18:09:33,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:09:33,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 18:09:33,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 18:09:33,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 18:09:33,585 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:09:33,586 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 18:09:33,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:09:33 BoogieIcfgContainer [2020-08-21 18:09:33,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:09:33,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:09:33,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:09:33,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:09:33,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:09:32" (1/3) ... [2020-08-21 18:09:33,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e4fac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:09:33, skipping insertion in model container [2020-08-21 18:09:33,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:32" (2/3) ... [2020-08-21 18:09:33,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e4fac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:09:33, skipping insertion in model container [2020-08-21 18:09:33,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:09:33" (3/3) ... [2020-08-21 18:09:33,599 INFO L109 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-08-21 18:09:33,608 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:09:33,615 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:09:33,630 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:09:33,653 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:09:33,654 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:09:33,654 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:09:33,654 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:09:33,655 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:09:33,655 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:09:33,655 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:09:33,655 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:09:33,675 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-08-21 18:09:33,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 18:09:33,681 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:33,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:33,683 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:33,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:33,689 INFO L82 PathProgramCache]: Analyzing trace with hash -573637036, now seen corresponding path program 1 times [2020-08-21 18:09:33,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:33,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310131921] [2020-08-21 18:09:33,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:34,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:34,033 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 18:09:34,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310131921] [2020-08-21 18:09:34,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:34,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 18:09:34,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785065303] [2020-08-21 18:09:34,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 18:09:34,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:34,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 18:09:34,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:09:34,082 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 7 states. [2020-08-21 18:09:34,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:34,591 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2020-08-21 18:09:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:09:34,593 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-08-21 18:09:34,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:34,615 INFO L225 Difference]: With dead ends: 90 [2020-08-21 18:09:34,616 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 18:09:34,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:09:34,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 18:09:34,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-08-21 18:09:34,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 18:09:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-08-21 18:09:34,717 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 13 [2020-08-21 18:09:34,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:34,717 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-08-21 18:09:34,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 18:09:34,718 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-08-21 18:09:34,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 18:09:34,735 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:34,735 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 18:09:34,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:09:34,738 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:34,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:34,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1917870949, now seen corresponding path program 1 times [2020-08-21 18:09:34,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:34,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3681619] [2020-08-21 18:09:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:34,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:34,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:09:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:34,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:34,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:34,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:35,037 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 18:09:35,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3681619] [2020-08-21 18:09:35,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:35,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 18:09:35,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272974898] [2020-08-21 18:09:35,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:09:35,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:35,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:09:35,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:09:35,042 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 9 states. [2020-08-21 18:09:35,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:35,291 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-08-21 18:09:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:09:35,293 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-21 18:09:35,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:35,295 INFO L225 Difference]: With dead ends: 69 [2020-08-21 18:09:35,296 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 18:09:35,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:09:35,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 18:09:35,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-21 18:09:35,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 18:09:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-08-21 18:09:35,313 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 38 [2020-08-21 18:09:35,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:35,314 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-08-21 18:09:35,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:09:35,314 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-08-21 18:09:35,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 18:09:35,316 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:35,316 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 18:09:35,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:09:35,317 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:35,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:35,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1624467942, now seen corresponding path program 1 times [2020-08-21 18:09:35,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:35,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637108595] [2020-08-21 18:09:35,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:35,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:35,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:09:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:35,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:35,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:35,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:35,568 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 18:09:35,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637108595] [2020-08-21 18:09:35,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:09:35,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 18:09:35,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397898599] [2020-08-21 18:09:35,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:09:35,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:35,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:09:35,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:09:35,571 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 9 states. [2020-08-21 18:09:35,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:35,768 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-08-21 18:09:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:09:35,769 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-21 18:09:35,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:35,771 INFO L225 Difference]: With dead ends: 71 [2020-08-21 18:09:35,771 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 18:09:35,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:09:35,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 18:09:35,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-08-21 18:09:35,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 18:09:35,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-08-21 18:09:35,781 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 38 [2020-08-21 18:09:35,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:35,782 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-08-21 18:09:35,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:09:35,782 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-08-21 18:09:35,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 18:09:35,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:35,784 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 18:09:35,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:09:35,784 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:35,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:35,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1655487749, now seen corresponding path program 1 times [2020-08-21 18:09:35,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:35,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239113753] [2020-08-21 18:09:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:35,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:36,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:09:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:36,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:36,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:36,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:36,160 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 18:09:36,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239113753] [2020-08-21 18:09:36,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:09:36,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 18:09:36,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691269221] [2020-08-21 18:09:36,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 18:09:36,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:36,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 18:09:36,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-08-21 18:09:36,163 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 15 states. [2020-08-21 18:09:37,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:37,041 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-08-21 18:09:37,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 18:09:37,042 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-08-21 18:09:37,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:37,043 INFO L225 Difference]: With dead ends: 77 [2020-08-21 18:09:37,044 INFO L226 Difference]: Without dead ends: 74 [2020-08-21 18:09:37,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2020-08-21 18:09:37,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-21 18:09:37,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2020-08-21 18:09:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-21 18:09:37,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-08-21 18:09:37,069 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 38 [2020-08-21 18:09:37,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:37,069 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-08-21 18:09:37,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 18:09:37,070 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-08-21 18:09:37,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 18:09:37,071 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:37,071 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 18:09:37,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:09:37,071 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:37,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:37,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1321471087, now seen corresponding path program 1 times [2020-08-21 18:09:37,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:37,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955841910] [2020-08-21 18:09:37,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:37,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:37,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:09:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:37,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:37,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:37,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:37,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 18:09:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:37,512 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 18:09:37,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955841910] [2020-08-21 18:09:37,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:09:37,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 18:09:37,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111397586] [2020-08-21 18:09:37,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 18:09:37,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:37,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 18:09:37,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-08-21 18:09:37,514 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 22 states. [2020-08-21 18:09:38,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:38,785 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-08-21 18:09:38,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 18:09:38,786 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-08-21 18:09:38,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:38,790 INFO L225 Difference]: With dead ends: 80 [2020-08-21 18:09:38,790 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 18:09:38,792 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 18:09:38,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 18:09:38,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-08-21 18:09:38,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 18:09:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-08-21 18:09:38,806 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 45 [2020-08-21 18:09:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:38,807 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-08-21 18:09:38,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 18:09:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-08-21 18:09:38,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 18:09:38,808 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:38,809 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 18:09:38,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:09:38,809 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:38,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:38,810 INFO L82 PathProgramCache]: Analyzing trace with hash 512124461, now seen corresponding path program 1 times [2020-08-21 18:09:38,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:38,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114538335] [2020-08-21 18:09:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:38,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:38,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:38,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:09:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:38,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:39,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:39,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:39,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 18:09:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:39,095 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 18:09:39,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114538335] [2020-08-21 18:09:39,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:09:39,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 18:09:39,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712360668] [2020-08-21 18:09:39,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 18:09:39,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:39,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 18:09:39,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-08-21 18:09:39,098 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 16 states. [2020-08-21 18:09:39,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:39,944 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-08-21 18:09:39,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 18:09:39,945 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-08-21 18:09:39,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:39,947 INFO L225 Difference]: With dead ends: 79 [2020-08-21 18:09:39,947 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 18:09:39,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2020-08-21 18:09:39,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 18:09:39,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 18:09:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 18:09:39,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-08-21 18:09:39,959 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 45 [2020-08-21 18:09:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:39,960 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-08-21 18:09:39,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 18:09:39,960 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-08-21 18:09:39,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 18:09:39,961 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:39,961 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 18:09:39,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:09:39,962 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:39,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:39,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1069126843, now seen corresponding path program 1 times [2020-08-21 18:09:39,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:39,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021236556] [2020-08-21 18:09:39,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:40,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:40,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:09:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:40,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:40,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:40,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:40,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 18:09:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:40,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 18:09:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:40,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 18:09:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:40,389 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 18:09:40,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021236556] [2020-08-21 18:09:40,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:09:40,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 18:09:40,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668992865] [2020-08-21 18:09:40,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 18:09:40,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:40,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 18:09:40,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-08-21 18:09:40,395 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 23 states. [2020-08-21 18:09:41,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:41,532 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-08-21 18:09:41,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 18:09:41,533 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-08-21 18:09:41,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:41,534 INFO L225 Difference]: With dead ends: 74 [2020-08-21 18:09:41,534 INFO L226 Difference]: Without dead ends: 71 [2020-08-21 18:09:41,536 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 18:09:41,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-21 18:09:41,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-08-21 18:09:41,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 18:09:41,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-08-21 18:09:41,562 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 57 [2020-08-21 18:09:41,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:41,563 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-08-21 18:09:41,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 18:09:41,563 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-08-21 18:09:41,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 18:09:41,567 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:41,568 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 18:09:41,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:09:41,568 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:41,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1878473469, now seen corresponding path program 1 times [2020-08-21 18:09:41,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:41,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395727676] [2020-08-21 18:09:41,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:41,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:41,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:09:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:41,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:41,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:41,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:41,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 18:09:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:41,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 18:09:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:41,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 18:09:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:42,008 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 18:09:42,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395727676] [2020-08-21 18:09:42,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:09:42,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 18:09:42,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380494977] [2020-08-21 18:09:42,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 18:09:42,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:42,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 18:09:42,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-08-21 18:09:42,011 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 22 states. [2020-08-21 18:09:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:43,031 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-21 18:09:43,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 18:09:43,032 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2020-08-21 18:09:43,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:43,033 INFO L225 Difference]: With dead ends: 84 [2020-08-21 18:09:43,034 INFO L226 Difference]: Without dead ends: 71 [2020-08-21 18:09:43,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 18:09:43,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-21 18:09:43,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-08-21 18:09:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 18:09:43,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-08-21 18:09:43,047 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 57 [2020-08-21 18:09:43,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:43,047 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-08-21 18:09:43,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 18:09:43,048 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-08-21 18:09:43,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 18:09:43,049 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:43,049 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 18:09:43,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:09:43,050 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:43,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:43,050 INFO L82 PathProgramCache]: Analyzing trace with hash 482320829, now seen corresponding path program 1 times [2020-08-21 18:09:43,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:43,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088376566] [2020-08-21 18:09:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:43,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:43,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:09:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:43,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:43,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:43,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:43,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 18:09:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:43,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 18:09:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:43,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 18:09:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:43,256 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 18:09:43,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088376566] [2020-08-21 18:09:43,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:09:43,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 18:09:43,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239200146] [2020-08-21 18:09:43,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 18:09:43,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:43,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 18:09:43,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:09:43,259 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 10 states. [2020-08-21 18:09:43,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:43,648 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-08-21 18:09:43,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 18:09:43,649 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-08-21 18:09:43,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:43,650 INFO L225 Difference]: With dead ends: 81 [2020-08-21 18:09:43,650 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 18:09:43,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-08-21 18:09:43,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 18:09:43,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-21 18:09:43,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 18:09:43,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-08-21 18:09:43,663 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 57 [2020-08-21 18:09:43,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:43,664 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-08-21 18:09:43,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 18:09:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-08-21 18:09:43,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 18:09:43,667 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:43,667 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 18:09:43,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:09:43,668 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:43,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:43,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1291667455, now seen corresponding path program 1 times [2020-08-21 18:09:43,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:43,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121144522] [2020-08-21 18:09:43,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:43,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:43,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:09:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:43,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:43,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:43,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:43,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 18:09:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:43,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 18:09:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:43,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 18:09:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:43,991 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 18:09:43,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121144522] [2020-08-21 18:09:43,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:09:43,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 18:09:43,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904974790] [2020-08-21 18:09:43,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 18:09:43,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:43,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 18:09:43,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-08-21 18:09:43,993 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 18 states. [2020-08-21 18:09:44,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:44,907 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2020-08-21 18:09:44,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 18:09:44,908 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-08-21 18:09:44,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:44,909 INFO L225 Difference]: With dead ends: 93 [2020-08-21 18:09:44,909 INFO L226 Difference]: Without dead ends: 82 [2020-08-21 18:09:44,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 18:09:44,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-21 18:09:44,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2020-08-21 18:09:44,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 18:09:44,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-08-21 18:09:44,921 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 57 [2020-08-21 18:09:44,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:44,921 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-08-21 18:09:44,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 18:09:44,922 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-08-21 18:09:44,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-21 18:09:44,923 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:44,923 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 18:09:44,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 18:09:44,923 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:44,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:44,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1118751113, now seen corresponding path program 1 times [2020-08-21 18:09:44,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:44,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731455392] [2020-08-21 18:09:44,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 18:09:44,944 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 18:09:44,945 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 18:09:44,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 18:09:44,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:09:44 BoogieIcfgContainer [2020-08-21 18:09:44,972 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:09:44,975 INFO L168 Benchmark]: Toolchain (without parser) took 12728.09 ms. Allocated memory was 141.6 MB in the beginning and 374.9 MB in the end (delta: 233.3 MB). Free memory was 103.2 MB in the beginning and 269.9 MB in the end (delta: -166.7 MB). Peak memory consumption was 66.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:44,976 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 18:09:44,977 INFO L168 Benchmark]: CACSL2BoogieTranslator took 643.82 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 103.0 MB in the beginning and 169.5 MB in the end (delta: -66.5 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:44,978 INFO L168 Benchmark]: Boogie Preprocessor took 99.73 ms. Allocated memory is still 205.5 MB. Free memory was 169.5 MB in the beginning and 166.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:44,979 INFO L168 Benchmark]: RCFGBuilder took 598.57 ms. Allocated memory is still 205.5 MB. Free memory was 166.9 MB in the beginning and 120.9 MB in the end (delta: 45.9 MB). Peak memory consumption was 45.9 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:44,979 INFO L168 Benchmark]: TraceAbstraction took 11381.14 ms. Allocated memory was 205.5 MB in the beginning and 374.9 MB in the end (delta: 169.3 MB). Free memory was 120.3 MB in the beginning and 269.9 MB in the end (delta: -149.6 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:44,983 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 643.82 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 103.0 MB in the beginning and 169.5 MB in the end (delta: -66.5 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 99.73 ms. Allocated memory is still 205.5 MB. Free memory was 169.5 MB in the beginning and 166.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 598.57 ms. Allocated memory is still 205.5 MB. Free memory was 166.9 MB in the beginning and 120.9 MB in the end (delta: 45.9 MB). Peak memory consumption was 45.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11381.14 ms. Allocated memory was 205.5 MB in the beginning and 374.9 MB in the end (delta: 169.3 MB). Free memory was 120.3 MB in the beginning and 269.9 MB in the end (delta: -149.6 MB). Peak memory consumption was 19.7 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: 11.2s, 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, 4.7s 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: 0.2s 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...