/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=1.0 --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 [2020-08-22 02:14:42,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 02:14:42,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 02:14:42,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 02:14:42,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 02:14:42,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 02:14:42,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 02:14:42,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 02:14:42,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 02:14:42,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 02:14:42,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 02:14:42,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 02:14:42,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 02:14:42,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 02:14:42,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 02:14:42,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 02:14:42,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 02:14:42,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 02:14:42,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 02:14:42,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 02:14:42,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 02:14:42,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 02:14:42,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 02:14:42,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 02:14:42,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 02:14:42,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 02:14:42,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 02:14:42,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 02:14:42,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 02:14:42,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 02:14:42,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 02:14:42,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 02:14:42,815 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 02:14:42,816 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 02:14:42,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 02:14:42,817 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 02:14:42,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 02:14:42,818 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 02:14:42,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 02:14:42,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 02:14:42,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 02:14:42,820 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 [2020-08-22 02:14:42,841 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 02:14:42,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 02:14:42,843 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 02:14:42,843 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 02:14:42,843 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 02:14:42,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 02:14:42,843 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 02:14:42,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 02:14:42,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 02:14:42,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 02:14:42,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 02:14:42,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 02:14:42,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 02:14:42,845 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 02:14:42,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 02:14:42,845 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 02:14:42,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 02:14:42,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 02:14:42,846 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 02:14:42,846 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 02:14:42,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 02:14:42,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:14:42,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 02:14:42,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 02:14:42,847 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 02:14:42,847 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 02:14:42,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 02:14:42,847 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 02:14:42,848 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 02:14:42,848 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=1.0;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=1.0;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=1.0;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=1.0;log-additional-information=true; [2020-08-22 02:14:43,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 02:14:43,164 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 02:14:43,172 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 02:14:43,174 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 02:14:43,175 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 02:14:43,176 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-08-22 02:14:43,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7473d242d/460c290d00284fe989544d255276bd1f/FLAGe3c998eaf [2020-08-22 02:14:43,704 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 02:14:43,704 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-08-22 02:14:43,720 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7473d242d/460c290d00284fe989544d255276bd1f/FLAGe3c998eaf [2020-08-22 02:14:43,983 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7473d242d/460c290d00284fe989544d255276bd1f [2020-08-22 02:14:43,991 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 02:14:43,992 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 02:14:43,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 02:14:43,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 02:14:43,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 02:14:43,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:14:43" (1/1) ... [2020-08-22 02:14:44,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@131863d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:43, skipping insertion in model container [2020-08-22 02:14:44,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:14:43" (1/1) ... [2020-08-22 02:14:44,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 02:14:44,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 02:14:44,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:14:44,414 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 02:14:44,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:14:44,657 INFO L208 MainTranslator]: Completed translation [2020-08-22 02:14:44,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:44 WrapperNode [2020-08-22 02:14:44,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 02:14:44,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 02:14:44,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 02:14:44,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 02:14:44,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:44" (1/1) ... [2020-08-22 02:14:44,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:44" (1/1) ... [2020-08-22 02:14:44,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:44" (1/1) ... [2020-08-22 02:14:44,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:44" (1/1) ... [2020-08-22 02:14:44,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:44" (1/1) ... [2020-08-22 02:14:44,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:44" (1/1) ... [2020-08-22 02:14:44,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:44" (1/1) ... [2020-08-22 02:14:44,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 02:14:44,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 02:14:44,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 02:14:44,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 02:14:44,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:44" (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 [2020-08-22 02:14:44,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 02:14:44,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 02:14:44,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-08-22 02:14:44,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2020-08-22 02:14:44,793 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2020-08-22 02:14:44,794 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-08-22 02:14:44,794 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-08-22 02:14:44,794 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 02:14:44,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 02:14:44,794 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-08-22 02:14:44,794 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-08-22 02:14:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-08-22 02:14:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-08-22 02:14:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-08-22 02:14:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-08-22 02:14:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-08-22 02:14:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-08-22 02:14:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-08-22 02:14:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-08-22 02:14:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-08-22 02:14:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-08-22 02:14:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-08-22 02:14:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-08-22 02:14:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-08-22 02:14:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-08-22 02:14:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-08-22 02:14:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-08-22 02:14:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-08-22 02:14:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-08-22 02:14:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-08-22 02:14:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-08-22 02:14:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-08-22 02:14:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-08-22 02:14:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-08-22 02:14:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-08-22 02:14:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-08-22 02:14:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-08-22 02:14:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-08-22 02:14:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-22 02:14:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-08-22 02:14:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-08-22 02:14:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-08-22 02:14:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-08-22 02:14:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-08-22 02:14:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-08-22 02:14:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-08-22 02:14:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-08-22 02:14:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-08-22 02:14:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-22 02:14:44,801 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-08-22 02:14:44,801 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-08-22 02:14:44,801 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-08-22 02:14:44,801 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-08-22 02:14:44,801 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-08-22 02:14:44,801 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-08-22 02:14:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-08-22 02:14:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-08-22 02:14:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-08-22 02:14:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-08-22 02:14:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-08-22 02:14:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-08-22 02:14:44,803 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-08-22 02:14:44,803 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-08-22 02:14:44,803 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-08-22 02:14:44,803 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-22 02:14:44,803 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-08-22 02:14:44,803 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-08-22 02:14:44,803 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-08-22 02:14:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-08-22 02:14:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-08-22 02:14:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-08-22 02:14:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-08-22 02:14:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-08-22 02:14:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-08-22 02:14:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-08-22 02:14:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-08-22 02:14:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-08-22 02:14:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-08-22 02:14:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-08-22 02:14:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-08-22 02:14:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-08-22 02:14:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-08-22 02:14:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-08-22 02:14:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-08-22 02:14:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-08-22 02:14:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-08-22 02:14:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-08-22 02:14:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-08-22 02:14:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-08-22 02:14:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-08-22 02:14:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-08-22 02:14:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-08-22 02:14:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-08-22 02:14:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-08-22 02:14:44,808 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-08-22 02:14:44,808 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-08-22 02:14:44,808 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-08-22 02:14:44,808 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-08-22 02:14:44,808 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-08-22 02:14:44,808 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-08-22 02:14:44,808 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-08-22 02:14:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-08-22 02:14:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-08-22 02:14:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-08-22 02:14:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-08-22 02:14:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-08-22 02:14:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-08-22 02:14:44,810 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-08-22 02:14:44,810 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-08-22 02:14:44,810 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-08-22 02:14:44,810 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-08-22 02:14:44,810 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 02:14:44,810 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 02:14:44,810 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 02:14:44,810 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 02:14:44,811 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-22 02:14:44,811 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-08-22 02:14:44,811 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 02:14:44,811 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-08-22 02:14:44,811 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-08-22 02:14:44,811 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-08-22 02:14:44,812 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-08-22 02:14:44,812 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-08-22 02:14:44,812 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-08-22 02:14:44,812 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-08-22 02:14:44,812 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-08-22 02:14:44,812 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-08-22 02:14:44,812 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-08-22 02:14:44,813 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-08-22 02:14:44,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 02:14:44,813 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2020-08-22 02:14:44,813 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2020-08-22 02:14:44,813 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-08-22 02:14:44,813 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-08-22 02:14:44,814 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 02:14:44,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 02:14:44,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 02:14:44,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-22 02:14:44,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 02:14:44,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 02:14:44,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 02:14:44,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 02:14:45,364 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 02:14:45,365 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 02:14:45,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:14:45 BoogieIcfgContainer [2020-08-22 02:14:45,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 02:14:45,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 02:14:45,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 02:14:45,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 02:14:45,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 02:14:43" (1/3) ... [2020-08-22 02:14:45,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634ea768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:14:45, skipping insertion in model container [2020-08-22 02:14:45,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:44" (2/3) ... [2020-08-22 02:14:45,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634ea768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:14:45, skipping insertion in model container [2020-08-22 02:14:45,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:14:45" (3/3) ... [2020-08-22 02:14:45,386 INFO L109 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-08-22 02:14:45,396 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 02:14:45,403 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 02:14:45,417 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 02:14:45,444 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 02:14:45,444 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 02:14:45,444 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 02:14:45,444 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 02:14:45,444 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 02:14:45,445 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 02:14:45,445 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 02:14:45,445 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 02:14:45,462 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-08-22 02:14:45,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 02:14:45,468 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:45,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:45,470 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:45,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:45,476 INFO L82 PathProgramCache]: Analyzing trace with hash -573637036, now seen corresponding path program 1 times [2020-08-22 02:14:45,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:45,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216213162] [2020-08-22 02:14:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:45,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:45,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:45,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216213162] [2020-08-22 02:14:45,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:45,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 02:14:45,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663565142] [2020-08-22 02:14:45,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 02:14:45,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:45,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 02:14:45,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:14:45,811 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 7 states. [2020-08-22 02:14:46,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:46,205 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2020-08-22 02:14:46,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 02:14:46,207 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-08-22 02:14:46,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:46,218 INFO L225 Difference]: With dead ends: 90 [2020-08-22 02:14:46,219 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 02:14:46,224 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 [2020-08-22 02:14:46,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 02:14:46,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-08-22 02:14:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 02:14:46,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-08-22 02:14:46,277 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 13 [2020-08-22 02:14:46,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:46,278 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-08-22 02:14:46,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 02:14:46,278 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-08-22 02:14:46,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 02:14:46,280 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:46,281 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] [2020-08-22 02:14:46,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 02:14:46,281 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:46,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:46,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1917870949, now seen corresponding path program 1 times [2020-08-22 02:14:46,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:46,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861077900] [2020-08-22 02:14:46,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:46,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:46,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:14:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:46,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:14:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:46,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 02:14:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:46,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:14:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 02:14:46,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861077900] [2020-08-22 02:14:46,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:46,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 02:14:46,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785014121] [2020-08-22 02:14:46,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 02:14:46,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:46,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 02:14:46,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:14:46,584 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 9 states. [2020-08-22 02:14:46,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:46,785 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-08-22 02:14:46,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 02:14:46,786 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-22 02:14:46,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:46,788 INFO L225 Difference]: With dead ends: 69 [2020-08-22 02:14:46,788 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 02:14:46,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:14:46,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 02:14:46,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-22 02:14:46,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 02:14:46,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-08-22 02:14:46,804 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 38 [2020-08-22 02:14:46,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:46,804 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-08-22 02:14:46,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 02:14:46,805 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-08-22 02:14:46,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 02:14:46,806 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:46,807 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] [2020-08-22 02:14:46,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 02:14:46,807 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:46,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:46,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1624467942, now seen corresponding path program 1 times [2020-08-22 02:14:46,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:46,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003235811] [2020-08-22 02:14:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:46,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:46,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:14:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:47,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:14:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:47,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 02:14:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:47,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:14:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 02:14:47,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003235811] [2020-08-22 02:14:47,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:14:47,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 02:14:47,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383078155] [2020-08-22 02:14:47,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 02:14:47,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:47,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 02:14:47,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:14:47,076 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 9 states. [2020-08-22 02:14:47,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:47,249 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-08-22 02:14:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 02:14:47,250 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-22 02:14:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:47,251 INFO L225 Difference]: With dead ends: 71 [2020-08-22 02:14:47,251 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 02:14:47,252 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 [2020-08-22 02:14:47,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 02:14:47,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-08-22 02:14:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 02:14:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-08-22 02:14:47,261 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 38 [2020-08-22 02:14:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:47,261 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-08-22 02:14:47,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 02:14:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-08-22 02:14:47,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 02:14:47,263 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:47,263 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] [2020-08-22 02:14:47,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 02:14:47,263 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:47,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:47,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1655487749, now seen corresponding path program 1 times [2020-08-22 02:14:47,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:47,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972642452] [2020-08-22 02:14:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:47,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:47,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:14:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:47,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:14:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:47,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 02:14:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:47,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:14:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 02:14:47,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972642452] [2020-08-22 02:14:47,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:14:47,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 02:14:47,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197989401] [2020-08-22 02:14:47,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 02:14:47,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:47,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 02:14:47,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-08-22 02:14:47,566 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 15 states. [2020-08-22 02:14:48,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:48,460 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-08-22 02:14:48,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 02:14:48,462 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-08-22 02:14:48,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:48,464 INFO L225 Difference]: With dead ends: 77 [2020-08-22 02:14:48,464 INFO L226 Difference]: Without dead ends: 74 [2020-08-22 02:14:48,465 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 [2020-08-22 02:14:48,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-22 02:14:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2020-08-22 02:14:48,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-22 02:14:48,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-08-22 02:14:48,479 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 38 [2020-08-22 02:14:48,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:48,480 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-08-22 02:14:48,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 02:14:48,480 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-08-22 02:14:48,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-22 02:14:48,481 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:48,481 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] [2020-08-22 02:14:48,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 02:14:48,481 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:48,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:48,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1321471087, now seen corresponding path program 1 times [2020-08-22 02:14:48,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:48,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241542407] [2020-08-22 02:14:48,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:48,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:48,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:14:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:48,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:14:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:48,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 02:14:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:48,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:14:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:48,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 02:14:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 02:14:48,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241542407] [2020-08-22 02:14:48,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:14:48,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 02:14:48,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919489298] [2020-08-22 02:14:48,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 02:14:48,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:48,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 02:14:48,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-08-22 02:14:48,871 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 22 states. [2020-08-22 02:14:50,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:50,116 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-08-22 02:14:50,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 02:14:50,116 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-08-22 02:14:50,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:50,119 INFO L225 Difference]: With dead ends: 80 [2020-08-22 02:14:50,119 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 02:14:50,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 02:14:50,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 02:14:50,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-08-22 02:14:50,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 02:14:50,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-08-22 02:14:50,135 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 45 [2020-08-22 02:14:50,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:50,135 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-08-22 02:14:50,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 02:14:50,136 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-08-22 02:14:50,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-22 02:14:50,137 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:50,137 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] [2020-08-22 02:14:50,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 02:14:50,137 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:50,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:50,138 INFO L82 PathProgramCache]: Analyzing trace with hash 512124461, now seen corresponding path program 1 times [2020-08-22 02:14:50,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:50,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808766788] [2020-08-22 02:14:50,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:50,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:50,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:14:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:50,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:14:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:50,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 02:14:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:50,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:14:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:50,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 02:14:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:50,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 02:14:50,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808766788] [2020-08-22 02:14:50,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:14:50,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 02:14:50,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467878949] [2020-08-22 02:14:50,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 02:14:50,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:50,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 02:14:50,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-08-22 02:14:50,421 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 16 states. [2020-08-22 02:14:51,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:51,140 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-08-22 02:14:51,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 02:14:51,141 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-08-22 02:14:51,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:51,142 INFO L225 Difference]: With dead ends: 79 [2020-08-22 02:14:51,142 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 02:14:51,143 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 [2020-08-22 02:14:51,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 02:14:51,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-22 02:14:51,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 02:14:51,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-08-22 02:14:51,164 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 45 [2020-08-22 02:14:51,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:51,164 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-08-22 02:14:51,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 02:14:51,165 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-08-22 02:14:51,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 02:14:51,168 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:51,168 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] [2020-08-22 02:14:51,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 02:14:51,169 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:51,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:51,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1069126843, now seen corresponding path program 1 times [2020-08-22 02:14:51,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:51,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103711980] [2020-08-22 02:14:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:51,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:51,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:14:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:51,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:14:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:51,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 02:14:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:51,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:14:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:51,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 02:14:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:51,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 02:14:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:51,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 02:14:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 02:14:51,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103711980] [2020-08-22 02:14:51,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:14:51,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 02:14:51,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670900477] [2020-08-22 02:14:51,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 02:14:51,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:51,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 02:14:51,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-08-22 02:14:51,588 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 23 states. [2020-08-22 02:14:52,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:52,650 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-08-22 02:14:52,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 02:14:52,651 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-08-22 02:14:52,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:52,652 INFO L225 Difference]: With dead ends: 74 [2020-08-22 02:14:52,652 INFO L226 Difference]: Without dead ends: 71 [2020-08-22 02:14:52,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=1238, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 02:14:52,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-22 02:14:52,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-08-22 02:14:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 02:14:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-08-22 02:14:52,679 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 57 [2020-08-22 02:14:52,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:52,679 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-08-22 02:14:52,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 02:14:52,680 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-08-22 02:14:52,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 02:14:52,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:52,684 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] [2020-08-22 02:14:52,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 02:14:52,684 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:52,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:52,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1878473469, now seen corresponding path program 1 times [2020-08-22 02:14:52,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:52,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749177878] [2020-08-22 02:14:52,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:52,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:52,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:14:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:52,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:14:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:52,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 02:14:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:52,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:14:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:52,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 02:14:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:52,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 02:14:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:53,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 02:14:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:53,084 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 02:14:53,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749177878] [2020-08-22 02:14:53,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:14:53,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 02:14:53,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007834347] [2020-08-22 02:14:53,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 02:14:53,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:53,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 02:14:53,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-08-22 02:14:53,087 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 22 states. [2020-08-22 02:14:54,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:54,087 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-22 02:14:54,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 02:14:54,087 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2020-08-22 02:14:54,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:54,089 INFO L225 Difference]: With dead ends: 84 [2020-08-22 02:14:54,089 INFO L226 Difference]: Without dead ends: 71 [2020-08-22 02:14:54,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 02:14:54,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-22 02:14:54,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-08-22 02:14:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 02:14:54,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-08-22 02:14:54,100 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 57 [2020-08-22 02:14:54,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:54,101 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-08-22 02:14:54,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 02:14:54,101 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-08-22 02:14:54,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 02:14:54,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:54,102 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] [2020-08-22 02:14:54,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 02:14:54,103 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:54,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:54,103 INFO L82 PathProgramCache]: Analyzing trace with hash 482320829, now seen corresponding path program 1 times [2020-08-22 02:14:54,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:54,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81753609] [2020-08-22 02:14:54,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:54,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:54,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:14:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:54,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:14:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:54,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 02:14:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:54,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:14:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:54,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 02:14:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:54,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 02:14:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:54,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 02:14:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-22 02:14:54,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81753609] [2020-08-22 02:14:54,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:14:54,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 02:14:54,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875930248] [2020-08-22 02:14:54,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 02:14:54,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:54,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 02:14:54,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-22 02:14:54,259 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 10 states. [2020-08-22 02:14:54,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:54,687 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-08-22 02:14:54,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 02:14:54,688 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-08-22 02:14:54,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:54,689 INFO L225 Difference]: With dead ends: 81 [2020-08-22 02:14:54,689 INFO L226 Difference]: Without dead ends: 69 [2020-08-22 02:14:54,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-08-22 02:14:54,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-22 02:14:54,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-22 02:14:54,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 02:14:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-08-22 02:14:54,700 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 57 [2020-08-22 02:14:54,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:54,701 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-08-22 02:14:54,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 02:14:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-08-22 02:14:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 02:14:54,702 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:54,703 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] [2020-08-22 02:14:54,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 02:14:54,703 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:54,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:54,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1291667455, now seen corresponding path program 1 times [2020-08-22 02:14:54,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:54,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39331783] [2020-08-22 02:14:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:54,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:54,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:14:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:54,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:14:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:54,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 02:14:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:54,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 02:14:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:54,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 02:14:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:54,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 02:14:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:54,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 02:14:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-22 02:14:55,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39331783] [2020-08-22 02:14:55,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:14:55,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 02:14:55,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122887768] [2020-08-22 02:14:55,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 02:14:55,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:55,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 02:14:55,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-08-22 02:14:55,028 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 18 states. [2020-08-22 02:14:55,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:55,848 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2020-08-22 02:14:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 02:14:55,849 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-08-22 02:14:55,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:55,851 INFO L225 Difference]: With dead ends: 93 [2020-08-22 02:14:55,851 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 02:14:55,852 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 [2020-08-22 02:14:55,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 02:14:55,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2020-08-22 02:14:55,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 02:14:55,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-08-22 02:14:55,861 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 57 [2020-08-22 02:14:55,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:55,861 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-08-22 02:14:55,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 02:14:55,862 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-08-22 02:14:55,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-22 02:14:55,863 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:55,863 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] [2020-08-22 02:14:55,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 02:14:55,863 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:55,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:55,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1118751113, now seen corresponding path program 1 times [2020-08-22 02:14:55,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:55,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430914112] [2020-08-22 02:14:55,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 02:14:55,884 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 02:14:55,884 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 02:14:55,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 02:14:55,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 02:14:55 BoogieIcfgContainer [2020-08-22 02:14:55,907 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 02:14:55,910 INFO L168 Benchmark]: Toolchain (without parser) took 11916.36 ms. Allocated memory was 140.0 MB in the beginning and 345.0 MB in the end (delta: 205.0 MB). Free memory was 102.4 MB in the beginning and 112.0 MB in the end (delta: -9.6 MB). Peak memory consumption was 195.4 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:55,910 INFO L168 Benchmark]: CDTParser took 0.68 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 02:14:55,911 INFO L168 Benchmark]: CACSL2BoogieTranslator took 665.68 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 102.0 MB in the beginning and 169.2 MB in the end (delta: -67.2 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:55,912 INFO L168 Benchmark]: Boogie Preprocessor took 68.99 ms. Allocated memory is still 203.4 MB. Free memory was 169.2 MB in the beginning and 166.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:55,913 INFO L168 Benchmark]: RCFGBuilder took 646.36 ms. Allocated memory is still 203.4 MB. Free memory was 166.5 MB in the beginning and 120.0 MB in the end (delta: 46.4 MB). Peak memory consumption was 46.4 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:55,914 INFO L168 Benchmark]: TraceAbstraction took 10531.05 ms. Allocated memory was 203.4 MB in the beginning and 345.0 MB in the end (delta: 141.6 MB). Free memory was 120.0 MB in the beginning and 112.0 MB in the end (delta: 8.1 MB). Peak memory consumption was 149.6 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:55,917 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 665.68 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 102.0 MB in the beginning and 169.2 MB in the end (delta: -67.2 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 68.99 ms. Allocated memory is still 203.4 MB. Free memory was 169.2 MB in the beginning and 166.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 646.36 ms. Allocated memory is still 203.4 MB. Free memory was 166.5 MB in the beginning and 120.0 MB in the end (delta: 46.4 MB). Peak memory consumption was 46.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10531.05 ms. Allocated memory was 203.4 MB in the beginning and 345.0 MB in the end (delta: 141.6 MB). Free memory was 120.0 MB in the beginning and 112.0 MB in the end (delta: 8.1 MB). Peak memory consumption was 149.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L867] void * guard_malloc_counter = 0; [L887] struct list_head *elem = ((void *)0); [L900] static struct list_head head; [L903] struct list_head *dev1, *dev2; [L904] CALL, EXPR my_malloc(sizeof(*dev1)) [L879] CALL, EXPR __getMemory(size) [L871] (size > 0) ? (0) : __blast_assert () [L872] guard_malloc_counter++ [L873] COND FALSE !(!__VERIFIER_nondet_int()) [L875] return (void *) guard_malloc_counter; [L879] RET, EXPR __getMemory(size) [L879] return __getMemory(size); [L904] RET, EXPR my_malloc(sizeof(*dev1)) [L904] dev1 = my_malloc(sizeof(*dev1)) [L905] CALL, EXPR my_malloc(sizeof(*dev2)) [L879] CALL, EXPR __getMemory(size) [L871] (size > 0) ? (0) : __blast_assert () [L872] guard_malloc_counter++ [L873] COND FALSE !(!__VERIFIER_nondet_int()) [L875] return (void *) guard_malloc_counter; [L879] RET, EXPR __getMemory(size) [L879] return __getMemory(size); [L905] RET, EXPR my_malloc(sizeof(*dev2)) [L905] dev2 = my_malloc(sizeof(*dev2)) [L906] COND TRUE dev1!=((void *)0) && dev2!=((void *)0) [L907] CALL list_add(dev2, &head) [L890] (new!=elem) ? (0) : __blast_assert () [L891] COND TRUE __VERIFIER_nondet_int() [L892] elem = new [L907] RET list_add(dev2, &head) [L908] CALL list_add(dev1, &head) [L890] (new!=elem) ? (0) : __blast_assert () [L891] COND TRUE __VERIFIER_nondet_int() [L892] elem = new [L908] RET list_add(dev1, &head) [L909] CALL list_del(dev2) [L896] COND FALSE !(entry==elem) [L909] RET list_del(dev2) [L910] CALL list_add(dev2, &head) [L890] (new!=elem) ? (0) : __blast_assert () [L891] COND FALSE !(__VERIFIER_nondet_int()) [L910] RET list_add(dev2, &head) [L913] CALL list_add(dev1, &head) [L890] (new!=elem) ? (0) : __blast_assert () [L890] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.4s, OverallIterations: 11, TraceHistogramMax: 4, AutomataDifference: 7.0s, 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, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 339 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 48 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.7s 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...