/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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 23:48:29,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:48:29,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:48:29,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:48:29,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:48:29,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:48:29,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:48:29,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:48:29,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:48:29,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:48:29,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:48:29,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:48:29,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:48:29,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:48:29,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:48:29,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:48:29,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:48:29,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:48:29,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:48:29,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:48:29,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:48:29,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:48:29,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:48:29,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:48:29,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:48:29,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:48:29,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:48:29,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:48:29,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:48:29,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 23:48:29,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 23:48:29,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 23:48:29,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 23:48:29,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 23:48:29,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 23:48:29,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 23:48:29,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 23:48:29,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 23:48:29,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:48:29,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:48:29,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:48:29,794 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 23:48:29,841 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:48:29,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:48:29,843 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:48:29,843 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:48:29,844 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:48:29,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:48:29,844 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:48:29,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:48:29,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:48:29,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:48:29,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:48:29,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:48:29,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:48:29,847 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:48:29,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:48:29,848 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:48:29,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:48:29,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:48:29,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:48:29,848 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:48:29,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:48:29,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:48:29,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:48:29,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:48:29,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:48:29,850 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:48:29,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:48:29,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:48:29,850 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:48:29,850 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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-08-21 23:48:30,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:48:30,193 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:48:30,197 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:48:30,198 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:48:30,199 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:48:30,199 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-08-21 23:48:30,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebd04ee34/3aead1bae4d44a28a1cdbc43da6772eb/FLAG9a47e2bf1 [2020-08-21 23:48:30,798 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:48:30,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-08-21 23:48:30,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebd04ee34/3aead1bae4d44a28a1cdbc43da6772eb/FLAG9a47e2bf1 [2020-08-21 23:48:31,161 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebd04ee34/3aead1bae4d44a28a1cdbc43da6772eb [2020-08-21 23:48:31,171 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:48:31,173 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:48:31,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:48:31,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:48:31,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:48:31,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:48:31" (1/1) ... [2020-08-21 23:48:31,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43965ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:31, skipping insertion in model container [2020-08-21 23:48:31,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:48:31" (1/1) ... [2020-08-21 23:48:31,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:48:31,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:48:31,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:48:31,702 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:48:31,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:48:31,840 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:48:31,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:31 WrapperNode [2020-08-21 23:48:31,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:48:31,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:48:31,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:48:31,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:48:31,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:31" (1/1) ... [2020-08-21 23:48:31,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:31" (1/1) ... [2020-08-21 23:48:31,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:31" (1/1) ... [2020-08-21 23:48:31,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:31" (1/1) ... [2020-08-21 23:48:31,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:31" (1/1) ... [2020-08-21 23:48:31,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:31" (1/1) ... [2020-08-21 23:48:31,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:31" (1/1) ... [2020-08-21 23:48:31,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:48:31,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:48:31,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:48:31,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:48:31,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:31" (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 23:48:31,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:48:31,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:48:31,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-08-21 23:48:31,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2020-08-21 23:48:31,975 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2020-08-21 23:48:31,976 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-08-21 23:48:31,976 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-08-21 23:48:31,976 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:48:31,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:48:31,976 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-08-21 23:48:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-08-21 23:48:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-08-21 23:48:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-08-21 23:48:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-08-21 23:48:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-08-21 23:48:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-08-21 23:48:31,978 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-08-21 23:48:31,978 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-08-21 23:48:31,978 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-08-21 23:48:31,978 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-08-21 23:48:31,978 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-08-21 23:48:31,978 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-08-21 23:48:31,979 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-08-21 23:48:31,979 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-08-21 23:48:31,979 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-08-21 23:48:31,979 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-08-21 23:48:31,979 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-08-21 23:48:31,980 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-08-21 23:48:31,980 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-08-21 23:48:31,980 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-08-21 23:48:31,980 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-08-21 23:48:31,980 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-08-21 23:48:31,980 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-08-21 23:48:31,981 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-08-21 23:48:31,981 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-08-21 23:48:31,981 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-08-21 23:48:31,981 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-08-21 23:48:31,981 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-08-21 23:48:31,981 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-21 23:48:31,982 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-08-21 23:48:31,982 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-08-21 23:48:31,982 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-08-21 23:48:31,982 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-08-21 23:48:31,982 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-08-21 23:48:31,982 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-08-21 23:48:31,983 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-08-21 23:48:31,983 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-08-21 23:48:31,983 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-08-21 23:48:31,983 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 23:48:31,983 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-08-21 23:48:31,983 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-08-21 23:48:31,984 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-08-21 23:48:31,984 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-08-21 23:48:31,984 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-08-21 23:48:31,984 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-08-21 23:48:31,984 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-08-21 23:48:31,984 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-08-21 23:48:31,985 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-08-21 23:48:31,985 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-08-21 23:48:31,985 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-08-21 23:48:31,985 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-08-21 23:48:31,985 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-08-21 23:48:31,985 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-08-21 23:48:31,985 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-08-21 23:48:31,986 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-21 23:48:31,986 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-08-21 23:48:31,986 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-08-21 23:48:31,986 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-08-21 23:48:31,986 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-08-21 23:48:31,986 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-08-21 23:48:31,986 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-08-21 23:48:31,987 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-08-21 23:48:31,987 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-08-21 23:48:31,987 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-08-21 23:48:31,987 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-08-21 23:48:31,987 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-08-21 23:48:31,987 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-08-21 23:48:31,988 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-08-21 23:48:31,988 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-08-21 23:48:31,988 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-08-21 23:48:31,988 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-08-21 23:48:31,988 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-08-21 23:48:31,988 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-08-21 23:48:31,989 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-08-21 23:48:31,989 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-08-21 23:48:31,989 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-08-21 23:48:31,989 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-08-21 23:48:31,989 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-08-21 23:48:31,989 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-08-21 23:48:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-08-21 23:48:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-08-21 23:48:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-08-21 23:48:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-08-21 23:48:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-08-21 23:48:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-08-21 23:48:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-08-21 23:48:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-08-21 23:48:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-08-21 23:48:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-08-21 23:48:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-08-21 23:48:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-08-21 23:48:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-08-21 23:48:31,991 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-08-21 23:48:31,992 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-08-21 23:48:31,992 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-08-21 23:48:31,992 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-08-21 23:48:31,992 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-08-21 23:48:31,992 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-08-21 23:48:31,992 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-08-21 23:48:31,993 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-08-21 23:48:31,993 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-08-21 23:48:31,993 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 23:48:31,993 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 23:48:31,993 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 23:48:31,993 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 23:48:31,993 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 23:48:31,994 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-08-21 23:48:31,994 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 23:48:31,994 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-08-21 23:48:31,994 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-08-21 23:48:31,994 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-08-21 23:48:31,994 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-08-21 23:48:31,995 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-08-21 23:48:31,995 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-08-21 23:48:31,995 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-08-21 23:48:31,995 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-08-21 23:48:31,995 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-08-21 23:48:31,995 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-08-21 23:48:31,995 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-08-21 23:48:31,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 23:48:31,996 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2020-08-21 23:48:31,996 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2020-08-21 23:48:31,996 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-08-21 23:48:31,996 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-08-21 23:48:31,997 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:48:31,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:48:31,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 23:48:31,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-21 23:48:31,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:48:31,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 23:48:31,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 23:48:31,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 23:48:32,555 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:48:32,555 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 23:48:32,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:48:32 BoogieIcfgContainer [2020-08-21 23:48:32,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:48:32,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:48:32,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:48:32,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:48:32,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:48:31" (1/3) ... [2020-08-21 23:48:32,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3902b407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:48:32, skipping insertion in model container [2020-08-21 23:48:32,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:31" (2/3) ... [2020-08-21 23:48:32,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3902b407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:48:32, skipping insertion in model container [2020-08-21 23:48:32,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:48:32" (3/3) ... [2020-08-21 23:48:32,569 INFO L109 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-08-21 23:48:32,580 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:48:32,588 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:48:32,600 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:48:32,621 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:48:32,621 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:48:32,621 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:48:32,621 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:48:32,622 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:48:32,622 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:48:32,622 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:48:32,622 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:48:32,642 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-08-21 23:48:32,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 23:48:32,649 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:32,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:32,651 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:32,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:32,658 INFO L82 PathProgramCache]: Analyzing trace with hash -573637036, now seen corresponding path program 1 times [2020-08-21 23:48:32,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:32,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615722254] [2020-08-21 23:48:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:32,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:32,993 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 23:48:32,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615722254] [2020-08-21 23:48:33,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:33,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 23:48:33,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363903261] [2020-08-21 23:48:33,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 23:48:33,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:33,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 23:48:33,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 23:48:33,054 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 7 states. [2020-08-21 23:48:33,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:33,460 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2020-08-21 23:48:33,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 23:48:33,462 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-08-21 23:48:33,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:33,474 INFO L225 Difference]: With dead ends: 90 [2020-08-21 23:48:33,475 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 23:48:33,479 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 23:48:33,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 23:48:33,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-08-21 23:48:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 23:48:33,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-08-21 23:48:33,536 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 13 [2020-08-21 23:48:33,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:33,537 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-08-21 23:48:33,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 23:48:33,537 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-08-21 23:48:33,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 23:48:33,540 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:33,540 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 23:48:33,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:48:33,541 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:33,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:33,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1917870949, now seen corresponding path program 1 times [2020-08-21 23:48:33,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:33,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239516788] [2020-08-21 23:48:33,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:33,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:33,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:48:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:33,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:33,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:33,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:33,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:33,838 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 23:48:33,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239516788] [2020-08-21 23:48:33,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:33,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 23:48:33,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849359947] [2020-08-21 23:48:33,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 23:48:33,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:33,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 23:48:33,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:48:33,842 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 9 states. [2020-08-21 23:48:34,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:34,076 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-08-21 23:48:34,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 23:48:34,077 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-21 23:48:34,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:34,079 INFO L225 Difference]: With dead ends: 69 [2020-08-21 23:48:34,080 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 23:48:34,081 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 23:48:34,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 23:48:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-21 23:48:34,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 23:48:34,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-08-21 23:48:34,096 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 38 [2020-08-21 23:48:34,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:34,096 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-08-21 23:48:34,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 23:48:34,097 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-08-21 23:48:34,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 23:48:34,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:34,102 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 23:48:34,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:48:34,103 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:34,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:34,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1624467942, now seen corresponding path program 1 times [2020-08-21 23:48:34,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:34,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300256727] [2020-08-21 23:48:34,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:34,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:34,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:48:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:34,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:34,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:34,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:34,386 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 23:48:34,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300256727] [2020-08-21 23:48:34,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:48:34,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 23:48:34,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386094990] [2020-08-21 23:48:34,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 23:48:34,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:34,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 23:48:34,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:48:34,389 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 9 states. [2020-08-21 23:48:34,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:34,604 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-08-21 23:48:34,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 23:48:34,606 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-21 23:48:34,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:34,607 INFO L225 Difference]: With dead ends: 71 [2020-08-21 23:48:34,608 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 23:48:34,608 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 23:48:34,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 23:48:34,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-08-21 23:48:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 23:48:34,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-08-21 23:48:34,627 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 38 [2020-08-21 23:48:34,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:34,628 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-08-21 23:48:34,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 23:48:34,628 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-08-21 23:48:34,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 23:48:34,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:34,629 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 23:48:34,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:48:34,630 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:34,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:34,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1655487749, now seen corresponding path program 1 times [2020-08-21 23:48:34,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:34,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245591501] [2020-08-21 23:48:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:34,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:34,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:48:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:34,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:34,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:34,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:34,975 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 23:48:34,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245591501] [2020-08-21 23:48:34,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:48:34,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 23:48:34,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983776687] [2020-08-21 23:48:34,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 23:48:34,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:34,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 23:48:34,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-08-21 23:48:34,978 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 15 states. [2020-08-21 23:48:35,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:35,866 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-08-21 23:48:35,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 23:48:35,866 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-08-21 23:48:35,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:35,868 INFO L225 Difference]: With dead ends: 77 [2020-08-21 23:48:35,869 INFO L226 Difference]: Without dead ends: 74 [2020-08-21 23:48:35,870 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 23:48:35,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-21 23:48:35,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2020-08-21 23:48:35,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-21 23:48:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-08-21 23:48:35,901 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 38 [2020-08-21 23:48:35,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:35,902 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-08-21 23:48:35,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 23:48:35,902 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-08-21 23:48:35,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 23:48:35,905 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:35,906 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 23:48:35,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 23:48:35,906 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:35,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:35,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1321471087, now seen corresponding path program 1 times [2020-08-21 23:48:35,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:35,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816090256] [2020-08-21 23:48:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:36,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:36,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:48:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:36,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:36,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:36,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:36,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 23:48:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:36,347 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 23:48:36,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816090256] [2020-08-21 23:48:36,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:48:36,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 23:48:36,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326865820] [2020-08-21 23:48:36,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 23:48:36,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:36,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 23:48:36,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-08-21 23:48:36,350 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 22 states. [2020-08-21 23:48:37,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:37,685 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-08-21 23:48:37,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 23:48:37,686 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-08-21 23:48:37,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:37,689 INFO L225 Difference]: With dead ends: 80 [2020-08-21 23:48:37,689 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 23:48:37,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 23:48:37,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 23:48:37,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-08-21 23:48:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 23:48:37,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-08-21 23:48:37,706 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 45 [2020-08-21 23:48:37,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:37,707 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-08-21 23:48:37,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 23:48:37,707 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-08-21 23:48:37,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 23:48:37,708 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:37,708 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 23:48:37,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 23:48:37,709 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:37,709 INFO L82 PathProgramCache]: Analyzing trace with hash 512124461, now seen corresponding path program 1 times [2020-08-21 23:48:37,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:37,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406445083] [2020-08-21 23:48:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:37,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:37,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:48:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:37,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:37,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:37,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:37,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 23:48:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:37,967 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 23:48:37,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406445083] [2020-08-21 23:48:37,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:48:37,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 23:48:37,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757221039] [2020-08-21 23:48:37,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 23:48:37,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:37,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 23:48:37,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-08-21 23:48:37,969 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 16 states. [2020-08-21 23:48:38,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:38,764 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-08-21 23:48:38,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 23:48:38,764 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-08-21 23:48:38,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:38,766 INFO L225 Difference]: With dead ends: 79 [2020-08-21 23:48:38,766 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 23:48:38,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2020-08-21 23:48:38,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 23:48:38,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 23:48:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 23:48:38,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-08-21 23:48:38,779 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 45 [2020-08-21 23:48:38,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:38,779 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-08-21 23:48:38,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 23:48:38,779 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-08-21 23:48:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 23:48:38,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:38,781 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 23:48:38,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 23:48:38,782 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:38,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:38,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1069126843, now seen corresponding path program 1 times [2020-08-21 23:48:38,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:38,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309555508] [2020-08-21 23:48:38,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:38,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:38,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:48:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:39,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:39,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:39,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:39,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 23:48:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:39,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 23:48:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:39,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 23:48:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:39,266 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 23:48:39,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309555508] [2020-08-21 23:48:39,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:48:39,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 23:48:39,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390959712] [2020-08-21 23:48:39,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 23:48:39,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:39,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 23:48:39,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-08-21 23:48:39,269 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 23 states. [2020-08-21 23:48:40,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:40,405 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-08-21 23:48:40,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 23:48:40,406 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-08-21 23:48:40,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:40,409 INFO L225 Difference]: With dead ends: 74 [2020-08-21 23:48:40,409 INFO L226 Difference]: Without dead ends: 71 [2020-08-21 23:48:40,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=1238, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 23:48:40,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-21 23:48:40,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-08-21 23:48:40,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 23:48:40,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-08-21 23:48:40,441 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 57 [2020-08-21 23:48:40,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:40,441 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-08-21 23:48:40,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 23:48:40,443 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-08-21 23:48:40,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 23:48:40,446 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:40,446 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 23:48:40,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 23:48:40,447 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:40,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:40,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1878473469, now seen corresponding path program 1 times [2020-08-21 23:48:40,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:40,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794066901] [2020-08-21 23:48:40,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:40,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:40,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:48:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:40,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:40,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:40,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:40,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 23:48:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:40,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 23:48:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:40,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 23:48:40,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:40,875 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 23:48:40,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794066901] [2020-08-21 23:48:40,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:48:40,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 23:48:40,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193090613] [2020-08-21 23:48:40,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 23:48:40,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:40,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 23:48:40,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-08-21 23:48:40,878 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 22 states. [2020-08-21 23:48:41,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:41,960 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-21 23:48:41,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 23:48:41,961 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2020-08-21 23:48:41,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:41,963 INFO L225 Difference]: With dead ends: 84 [2020-08-21 23:48:41,963 INFO L226 Difference]: Without dead ends: 71 [2020-08-21 23:48:41,964 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 23:48:41,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-21 23:48:41,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-08-21 23:48:41,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 23:48:41,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-08-21 23:48:41,976 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 57 [2020-08-21 23:48:41,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:41,977 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-08-21 23:48:41,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 23:48:41,977 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-08-21 23:48:41,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 23:48:41,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:41,978 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 23:48:41,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 23:48:41,979 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:41,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:41,979 INFO L82 PathProgramCache]: Analyzing trace with hash 482320829, now seen corresponding path program 1 times [2020-08-21 23:48:41,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:41,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497098368] [2020-08-21 23:48:41,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:42,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:42,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:48:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:42,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:42,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:42,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:42,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 23:48:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:42,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 23:48:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:42,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 23:48:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:42,153 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 23:48:42,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497098368] [2020-08-21 23:48:42,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:48:42,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 23:48:42,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727271975] [2020-08-21 23:48:42,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:48:42,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:42,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:48:42,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:48:42,160 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 10 states. [2020-08-21 23:48:42,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:42,651 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-08-21 23:48:42,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 23:48:42,652 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-08-21 23:48:42,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:42,653 INFO L225 Difference]: With dead ends: 81 [2020-08-21 23:48:42,653 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 23:48:42,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-08-21 23:48:42,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 23:48:42,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-21 23:48:42,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 23:48:42,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-08-21 23:48:42,672 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 57 [2020-08-21 23:48:42,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:42,672 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-08-21 23:48:42,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:48:42,673 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-08-21 23:48:42,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 23:48:42,676 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:42,676 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 23:48:42,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 23:48:42,676 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:42,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:42,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1291667455, now seen corresponding path program 1 times [2020-08-21 23:48:42,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:42,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753201247] [2020-08-21 23:48:42,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:42,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:42,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:48:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:42,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:42,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:42,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:42,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 23:48:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:42,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 23:48:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:42,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 23:48:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:42,949 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 23:48:42,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753201247] [2020-08-21 23:48:42,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:48:42,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 23:48:42,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257042473] [2020-08-21 23:48:42,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 23:48:42,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:42,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 23:48:42,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-08-21 23:48:42,952 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 18 states. [2020-08-21 23:48:43,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:43,926 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2020-08-21 23:48:43,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 23:48:43,927 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-08-21 23:48:43,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:43,931 INFO L225 Difference]: With dead ends: 93 [2020-08-21 23:48:43,932 INFO L226 Difference]: Without dead ends: 82 [2020-08-21 23:48:43,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 23:48:43,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-21 23:48:43,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2020-08-21 23:48:43,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 23:48:43,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-08-21 23:48:43,956 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 57 [2020-08-21 23:48:43,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:43,959 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-08-21 23:48:43,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 23:48:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-08-21 23:48:43,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-21 23:48:43,961 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:43,962 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 23:48:43,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 23:48:43,962 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:43,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:43,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1118751113, now seen corresponding path program 1 times [2020-08-21 23:48:43,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:43,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359183486] [2020-08-21 23:48:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 23:48:44,009 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 23:48:44,010 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 23:48:44,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 23:48:44,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 11:48:44 BoogieIcfgContainer [2020-08-21 23:48:44,050 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 23:48:44,054 INFO L168 Benchmark]: Toolchain (without parser) took 12879.91 ms. Allocated memory was 141.6 MB in the beginning and 388.5 MB in the end (delta: 246.9 MB). Free memory was 103.4 MB in the beginning and 342.4 MB in the end (delta: -239.0 MB). Peak memory consumption was 7.9 MB. Max. memory is 7.1 GB. [2020-08-21 23:48:44,055 INFO L168 Benchmark]: CDTParser took 0.24 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 23:48:44,062 INFO L168 Benchmark]: CACSL2BoogieTranslator took 667.79 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 103.2 MB in the beginning and 168.4 MB in the end (delta: -65.2 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. [2020-08-21 23:48:44,062 INFO L168 Benchmark]: Boogie Preprocessor took 62.41 ms. Allocated memory is still 203.9 MB. Free memory was 168.4 MB in the beginning and 165.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-21 23:48:44,066 INFO L168 Benchmark]: RCFGBuilder took 655.54 ms. Allocated memory is still 203.9 MB. Free memory was 165.7 MB in the beginning and 120.0 MB in the end (delta: 45.7 MB). Peak memory consumption was 45.7 MB. Max. memory is 7.1 GB. [2020-08-21 23:48:44,067 INFO L168 Benchmark]: TraceAbstraction took 11489.34 ms. Allocated memory was 203.9 MB in the beginning and 388.5 MB in the end (delta: 184.5 MB). Free memory was 119.4 MB in the beginning and 342.4 MB in the end (delta: -223.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 23:48:44,076 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 667.79 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 103.2 MB in the beginning and 168.4 MB in the end (delta: -65.2 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 62.41 ms. Allocated memory is still 203.9 MB. Free memory was 168.4 MB in the beginning and 165.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 655.54 ms. Allocated memory is still 203.9 MB. Free memory was 165.7 MB in the beginning and 120.0 MB in the end (delta: 45.7 MB). Peak memory consumption was 45.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11489.34 ms. Allocated memory was 203.9 MB in the beginning and 388.5 MB in the end (delta: 184.5 MB). Free memory was 119.4 MB in the beginning and 342.4 MB in the end (delta: -223.0 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L867] void * guard_malloc_counter = 0; [L887] struct list_head *elem = ((void *)0); [L900] static struct list_head head; [L903] struct list_head *dev1, *dev2; [L904] CALL, EXPR my_malloc(sizeof(*dev1)) [L879] CALL, EXPR __getMemory(size) [L871] (size > 0) ? (0) : __blast_assert () [L872] guard_malloc_counter++ [L873] COND FALSE !(!__VERIFIER_nondet_int()) [L875] return (void *) guard_malloc_counter; [L879] RET, EXPR __getMemory(size) [L879] return __getMemory(size); [L904] RET, EXPR my_malloc(sizeof(*dev1)) [L904] dev1 = my_malloc(sizeof(*dev1)) [L905] CALL, EXPR my_malloc(sizeof(*dev2)) [L879] CALL, EXPR __getMemory(size) [L871] (size > 0) ? (0) : __blast_assert () [L872] guard_malloc_counter++ [L873] COND FALSE !(!__VERIFIER_nondet_int()) [L875] return (void *) guard_malloc_counter; [L879] RET, EXPR __getMemory(size) [L879] return __getMemory(size); [L905] RET, EXPR my_malloc(sizeof(*dev2)) [L905] dev2 = my_malloc(sizeof(*dev2)) [L906] COND TRUE dev1!=((void *)0) && dev2!=((void *)0) [L907] CALL list_add(dev2, &head) [L890] (new!=elem) ? (0) : __blast_assert () [L891] COND TRUE __VERIFIER_nondet_int() [L892] elem = new [L907] RET list_add(dev2, &head) [L908] CALL list_add(dev1, &head) [L890] (new!=elem) ? (0) : __blast_assert () [L891] COND TRUE __VERIFIER_nondet_int() [L892] elem = new [L908] RET list_add(dev1, &head) [L909] CALL list_del(dev2) [L896] COND FALSE !(entry==elem) [L909] RET list_del(dev2) [L910] CALL list_add(dev2, &head) [L890] (new!=elem) ? (0) : __blast_assert () [L891] COND FALSE !(__VERIFIER_nondet_int()) [L910] RET list_add(dev2, &head) [L913] CALL list_add(dev1, &head) [L890] (new!=elem) ? (0) : __blast_assert () [L890] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.3s, OverallIterations: 11, TraceHistogramMax: 4, AutomataDifference: 7.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 377 SDtfs, 460 SDslu, 973 SDs, 0 SdLazy, 5202 SolverSat, 537 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 339 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 48 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.8s 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...