/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:19:49,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:19:49,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:19:50,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:19:50,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:19:50,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:19:50,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:19:50,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:19:50,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:19:50,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:19:50,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:19:50,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:19:50,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:19:50,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:19:50,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:19:50,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:19:50,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:19:50,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:19:50,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:19:50,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:19:50,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:19:50,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:19:50,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:19:50,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:19:50,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 13:19:50,044 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 13:19:50,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 13:19:50,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 13:19:50,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 13:19:50,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 13:19:50,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 13:19:50,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 13:19:50,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 13:19:50,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 13:19:50,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 13:19:50,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 13:19:50,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 13:19:50,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 13:19:50,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:19:50,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:19:50,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:19:50,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 13:19:50,078 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:19:50,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:19:50,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:19:50,079 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:19:50,080 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:19:50,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:19:50,080 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:19:50,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:19:50,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:19:50,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:19:50,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:19:50,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:19:50,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:19:50,081 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:19:50,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:19:50,082 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:19:50,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:19:50,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:19:50,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:19:50,082 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:19:50,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:19:50,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:19:50,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:19:50,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:19:50,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:19:50,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:19:50,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:19:50,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:19:50,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:19:50,084 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 -> false [2020-08-21 13:19:50,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:19:50,392 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:19:50,395 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:19:50,397 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:19:50,397 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:19:50,398 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-08-21 13:19:50,458 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f3b0111a/5bc471eeb55b44f2845181883e95afcd/FLAGf3baf4282 [2020-08-21 13:19:51,039 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:19:51,040 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-08-21 13:19:51,058 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f3b0111a/5bc471eeb55b44f2845181883e95afcd/FLAGf3baf4282 [2020-08-21 13:19:51,474 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f3b0111a/5bc471eeb55b44f2845181883e95afcd [2020-08-21 13:19:51,482 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:19:51,484 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:19:51,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:19:51,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:19:51,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:19:51,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:19:51" (1/1) ... [2020-08-21 13:19:51,493 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69894223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:51, skipping insertion in model container [2020-08-21 13:19:51,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:19:51" (1/1) ... [2020-08-21 13:19:51,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:19:51,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:19:51,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:19:51,967 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:19:52,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:19:52,086 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:19:52,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:52 WrapperNode [2020-08-21 13:19:52,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:19:52,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:19:52,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:19:52,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:19:52,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:52" (1/1) ... [2020-08-21 13:19:52,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:52" (1/1) ... [2020-08-21 13:19:52,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:52" (1/1) ... [2020-08-21 13:19:52,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:52" (1/1) ... [2020-08-21 13:19:52,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:52" (1/1) ... [2020-08-21 13:19:52,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:52" (1/1) ... [2020-08-21 13:19:52,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:52" (1/1) ... [2020-08-21 13:19:52,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:19:52,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:19:52,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:19:52,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:19:52,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:19:52,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:19:52,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:19:52,242 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-08-21 13:19:52,242 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2020-08-21 13:19:52,242 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2020-08-21 13:19:52,243 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-08-21 13:19:52,243 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-08-21 13:19:52,243 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:19:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:19:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-08-21 13:19:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-08-21 13:19:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-08-21 13:19:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-08-21 13:19:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-08-21 13:19:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-08-21 13:19:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-08-21 13:19:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-08-21 13:19:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-08-21 13:19:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-08-21 13:19:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-08-21 13:19:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-08-21 13:19:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-08-21 13:19:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-08-21 13:19:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-08-21 13:19:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-08-21 13:19:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-08-21 13:19:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-08-21 13:19:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-08-21 13:19:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-08-21 13:19:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-08-21 13:19:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-08-21 13:19:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-08-21 13:19:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-08-21 13:19:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-08-21 13:19:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-08-21 13:19:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-08-21 13:19:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-08-21 13:19:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-08-21 13:19:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-21 13:19:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-08-21 13:19:52,250 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-08-21 13:19:52,250 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-08-21 13:19:52,250 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-08-21 13:19:52,250 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-08-21 13:19:52,250 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-08-21 13:19:52,250 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-08-21 13:19:52,252 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-08-21 13:19:52,253 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-08-21 13:19:52,254 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 13:19:52,254 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-08-21 13:19:52,254 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-08-21 13:19:52,254 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-08-21 13:19:52,254 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-08-21 13:19:52,254 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-08-21 13:19:52,254 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-08-21 13:19:52,255 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-08-21 13:19:52,255 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-08-21 13:19:52,255 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-08-21 13:19:52,255 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-08-21 13:19:52,256 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-08-21 13:19:52,256 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-08-21 13:19:52,256 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-08-21 13:19:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-08-21 13:19:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-08-21 13:19:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-21 13:19:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-08-21 13:19:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-08-21 13:19:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-08-21 13:19:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-08-21 13:19:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-08-21 13:19:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-08-21 13:19:52,259 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-08-21 13:19:52,260 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-08-21 13:19:52,260 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-08-21 13:19:52,260 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-08-21 13:19:52,261 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-08-21 13:19:52,262 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-08-21 13:19:52,262 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-08-21 13:19:52,262 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-08-21 13:19:52,264 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-08-21 13:19:52,264 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-08-21 13:19:52,264 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-08-21 13:19:52,264 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-08-21 13:19:52,264 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-08-21 13:19:52,264 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-08-21 13:19:52,265 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-08-21 13:19:52,265 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-08-21 13:19:52,265 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-08-21 13:19:52,265 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-08-21 13:19:52,265 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-08-21 13:19:52,265 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-08-21 13:19:52,265 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-08-21 13:19:52,266 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-08-21 13:19:52,266 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-08-21 13:19:52,266 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-08-21 13:19:52,266 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-08-21 13:19:52,266 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-08-21 13:19:52,266 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-08-21 13:19:52,266 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-08-21 13:19:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-08-21 13:19:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-08-21 13:19:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-08-21 13:19:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-08-21 13:19:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-08-21 13:19:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-08-21 13:19:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-08-21 13:19:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-08-21 13:19:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-08-21 13:19:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-08-21 13:19:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-08-21 13:19:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-08-21 13:19:52,268 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 13:19:52,269 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 13:19:52,269 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 13:19:52,270 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 13:19:52,270 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 13:19:52,270 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-08-21 13:19:52,270 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 13:19:52,271 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-08-21 13:19:52,272 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-08-21 13:19:52,272 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-08-21 13:19:52,273 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-08-21 13:19:52,273 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-08-21 13:19:52,274 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-08-21 13:19:52,274 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-08-21 13:19:52,274 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-08-21 13:19:52,274 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-08-21 13:19:52,275 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-08-21 13:19:52,275 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-08-21 13:19:52,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 13:19:52,276 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2020-08-21 13:19:52,276 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2020-08-21 13:19:52,277 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-08-21 13:19:52,277 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-08-21 13:19:52,280 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:19:52,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:19:52,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 13:19:52,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-21 13:19:52,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:19:52,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 13:19:52,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 13:19:52,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 13:19:52,953 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:19:52,953 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 13:19:52,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:19:52 BoogieIcfgContainer [2020-08-21 13:19:52,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:19:52,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:19:52,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:19:52,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:19:52,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:19:51" (1/3) ... [2020-08-21 13:19:52,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@725deba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:19:52, skipping insertion in model container [2020-08-21 13:19:52,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:52" (2/3) ... [2020-08-21 13:19:52,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@725deba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:19:52, skipping insertion in model container [2020-08-21 13:19:52,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:19:52" (3/3) ... [2020-08-21 13:19:52,975 INFO L109 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-08-21 13:19:52,985 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:19:52,993 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:19:53,007 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:19:53,033 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:19:53,033 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:19:53,033 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:19:53,033 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:19:53,034 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:19:53,034 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:19:53,034 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:19:53,034 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:19:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-08-21 13:19:53,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 13:19:53,061 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:53,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:53,062 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:53,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:53,068 INFO L82 PathProgramCache]: Analyzing trace with hash -573637036, now seen corresponding path program 1 times [2020-08-21 13:19:53,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:53,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937477233] [2020-08-21 13:19:53,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:53,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:53,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937477233] [2020-08-21 13:19:53,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:53,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 13:19:53,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963303648] [2020-08-21 13:19:53,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 13:19:53,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:53,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 13:19:53,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:19:53,412 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 7 states. [2020-08-21 13:19:53,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:53,817 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2020-08-21 13:19:53,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 13:19:53,819 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-08-21 13:19:53,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:53,830 INFO L225 Difference]: With dead ends: 90 [2020-08-21 13:19:53,831 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 13:19:53,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:19:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 13:19:53,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-08-21 13:19:53,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 13:19:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-08-21 13:19:53,891 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 13 [2020-08-21 13:19:53,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:53,891 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-08-21 13:19:53,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 13:19:53,892 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-08-21 13:19:53,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 13:19:53,894 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:53,894 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:53,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:19:53,895 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:53,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:53,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1917870949, now seen corresponding path program 1 times [2020-08-21 13:19:53,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:53,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559716289] [2020-08-21 13:19:53,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:54,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:54,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:19:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:54,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:19:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:54,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 13:19:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:54,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:19:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 13:19:54,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559716289] [2020-08-21 13:19:54,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:54,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 13:19:54,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538522278] [2020-08-21 13:19:54,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 13:19:54,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:54,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 13:19:54,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:19:54,233 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 9 states. [2020-08-21 13:19:54,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:54,431 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-08-21 13:19:54,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 13:19:54,432 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-21 13:19:54,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:54,434 INFO L225 Difference]: With dead ends: 69 [2020-08-21 13:19:54,434 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 13:19:54,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:19:54,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 13:19:54,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-21 13:19:54,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 13:19:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-08-21 13:19:54,448 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 38 [2020-08-21 13:19:54,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:54,449 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-08-21 13:19:54,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 13:19:54,449 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-08-21 13:19:54,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 13:19:54,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:54,451 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:54,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:19:54,451 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:54,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:54,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1624467942, now seen corresponding path program 1 times [2020-08-21 13:19:54,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:54,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214120961] [2020-08-21 13:19:54,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:54,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:54,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:19:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:54,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:19:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:54,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 13:19:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:54,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:19:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 13:19:54,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214120961] [2020-08-21 13:19:54,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:54,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 13:19:54,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608242142] [2020-08-21 13:19:54,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 13:19:54,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:54,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 13:19:54,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:19:54,748 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 9 states. [2020-08-21 13:19:54,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:54,937 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-08-21 13:19:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 13:19:54,937 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-21 13:19:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:54,939 INFO L225 Difference]: With dead ends: 71 [2020-08-21 13:19:54,939 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 13:19:54,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:19:54,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 13:19:54,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-08-21 13:19:54,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 13:19:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-08-21 13:19:54,949 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 38 [2020-08-21 13:19:54,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:54,949 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-08-21 13:19:54,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 13:19:54,950 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-08-21 13:19:54,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 13:19:54,951 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:54,951 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:54,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:19:54,951 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:54,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:54,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1655487749, now seen corresponding path program 1 times [2020-08-21 13:19:54,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:54,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570146166] [2020-08-21 13:19:54,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:55,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:55,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:19:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:55,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:19:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:55,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 13:19:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:55,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:19:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 13:19:55,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570146166] [2020-08-21 13:19:55,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:55,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 13:19:55,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556734634] [2020-08-21 13:19:55,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 13:19:55,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:55,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 13:19:55,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-08-21 13:19:55,256 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 15 states. [2020-08-21 13:19:56,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:56,123 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-08-21 13:19:56,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 13:19:56,124 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-08-21 13:19:56,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:56,126 INFO L225 Difference]: With dead ends: 77 [2020-08-21 13:19:56,126 INFO L226 Difference]: Without dead ends: 74 [2020-08-21 13:19:56,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2020-08-21 13:19:56,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-21 13:19:56,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2020-08-21 13:19:56,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-21 13:19:56,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-08-21 13:19:56,141 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 38 [2020-08-21 13:19:56,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:56,142 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-08-21 13:19:56,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 13:19:56,142 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-08-21 13:19:56,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 13:19:56,143 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:56,144 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:56,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:19:56,144 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:56,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:56,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1321471087, now seen corresponding path program 1 times [2020-08-21 13:19:56,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:56,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25508177] [2020-08-21 13:19:56,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:56,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:56,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:19:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:56,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:19:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:56,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 13:19:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:56,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:19:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:56,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 13:19:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 13:19:56,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25508177] [2020-08-21 13:19:56,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:56,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 13:19:56,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115536288] [2020-08-21 13:19:56,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 13:19:56,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:56,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 13:19:56,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-08-21 13:19:56,568 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 22 states. [2020-08-21 13:19:57,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:57,869 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-08-21 13:19:57,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 13:19:57,869 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-08-21 13:19:57,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:57,872 INFO L225 Difference]: With dead ends: 80 [2020-08-21 13:19:57,873 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 13:19:57,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 13:19:57,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 13:19:57,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-08-21 13:19:57,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 13:19:57,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-08-21 13:19:57,889 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 45 [2020-08-21 13:19:57,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:57,890 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-08-21 13:19:57,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 13:19:57,890 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-08-21 13:19:57,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 13:19:57,891 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:57,891 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:57,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:19:57,892 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:57,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:57,892 INFO L82 PathProgramCache]: Analyzing trace with hash 512124461, now seen corresponding path program 1 times [2020-08-21 13:19:57,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:57,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179851080] [2020-08-21 13:19:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:58,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:58,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:19:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:58,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:19:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:58,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 13:19:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:58,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:19:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:58,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 13:19:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 13:19:58,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179851080] [2020-08-21 13:19:58,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:58,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 13:19:58,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198371543] [2020-08-21 13:19:58,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 13:19:58,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:58,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 13:19:58,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-08-21 13:19:58,172 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 16 states. [2020-08-21 13:19:58,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:58,971 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-08-21 13:19:58,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 13:19:58,972 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-08-21 13:19:58,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:58,974 INFO L225 Difference]: With dead ends: 79 [2020-08-21 13:19:58,974 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 13:19:58,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2020-08-21 13:19:58,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 13:19:58,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 13:19:58,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 13:19:58,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-08-21 13:19:58,987 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 45 [2020-08-21 13:19:58,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:58,988 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-08-21 13:19:58,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 13:19:58,988 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-08-21 13:19:58,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 13:19:58,989 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:58,989 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:58,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 13:19:58,990 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:58,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:58,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1069126843, now seen corresponding path program 1 times [2020-08-21 13:19:58,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:58,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606471209] [2020-08-21 13:19:58,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:59,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:59,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:19:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:59,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:19:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:59,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 13:19:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:59,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:19:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:59,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 13:19:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:59,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 13:19:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:59,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 13:19:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 13:19:59,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606471209] [2020-08-21 13:19:59,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:59,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 13:19:59,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779696978] [2020-08-21 13:19:59,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 13:19:59,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:59,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 13:19:59,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-08-21 13:19:59,454 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 23 states. [2020-08-21 13:20:00,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:00,512 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-08-21 13:20:00,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 13:20:00,514 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-08-21 13:20:00,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:00,516 INFO L225 Difference]: With dead ends: 74 [2020-08-21 13:20:00,516 INFO L226 Difference]: Without dead ends: 71 [2020-08-21 13:20:00,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=1238, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 13:20:00,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-21 13:20:00,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-08-21 13:20:00,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 13:20:00,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-08-21 13:20:00,529 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 57 [2020-08-21 13:20:00,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:00,529 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-08-21 13:20:00,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 13:20:00,530 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-08-21 13:20:00,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 13:20:00,531 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:00,531 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:00,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 13:20:00,532 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:00,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:00,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1878473469, now seen corresponding path program 1 times [2020-08-21 13:20:00,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:00,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033475576] [2020-08-21 13:20:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:00,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:00,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:20:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:00,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:20:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:00,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 13:20:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:00,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:20:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:00,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 13:20:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:00,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 13:20:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:00,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 13:20:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 13:20:00,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033475576] [2020-08-21 13:20:00,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:00,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 13:20:00,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917137425] [2020-08-21 13:20:00,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 13:20:00,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:00,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 13:20:00,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-08-21 13:20:00,996 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 22 states. [2020-08-21 13:20:02,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:02,004 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-21 13:20:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 13:20:02,005 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2020-08-21 13:20:02,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:02,006 INFO L225 Difference]: With dead ends: 84 [2020-08-21 13:20:02,006 INFO L226 Difference]: Without dead ends: 71 [2020-08-21 13:20:02,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 13:20:02,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-21 13:20:02,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-08-21 13:20:02,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 13:20:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-08-21 13:20:02,018 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 57 [2020-08-21 13:20:02,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:02,018 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-08-21 13:20:02,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 13:20:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-08-21 13:20:02,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 13:20:02,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:02,020 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:02,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 13:20:02,021 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:02,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:02,021 INFO L82 PathProgramCache]: Analyzing trace with hash 482320829, now seen corresponding path program 1 times [2020-08-21 13:20:02,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:02,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007663870] [2020-08-21 13:20:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:02,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:02,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:20:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:02,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:20:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:02,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 13:20:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:02,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:20:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:02,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 13:20:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:02,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 13:20:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:02,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 13:20:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-21 13:20:02,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007663870] [2020-08-21 13:20:02,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:02,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 13:20:02,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507661437] [2020-08-21 13:20:02,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:20:02,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:02,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:20:02,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:20:02,217 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 10 states. [2020-08-21 13:20:02,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:02,696 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-08-21 13:20:02,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 13:20:02,696 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-08-21 13:20:02,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:02,698 INFO L225 Difference]: With dead ends: 81 [2020-08-21 13:20:02,698 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 13:20:02,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-08-21 13:20:02,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 13:20:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-21 13:20:02,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 13:20:02,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-08-21 13:20:02,720 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 57 [2020-08-21 13:20:02,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:02,725 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-08-21 13:20:02,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:20:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-08-21 13:20:02,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 13:20:02,727 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:02,728 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:02,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 13:20:02,731 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:02,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:02,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1291667455, now seen corresponding path program 1 times [2020-08-21 13:20:02,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:02,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407221030] [2020-08-21 13:20:02,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:02,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:02,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:20:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:02,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:20:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:02,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 13:20:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:03,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:20:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:03,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 13:20:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:03,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 13:20:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:03,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 13:20:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-21 13:20:03,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407221030] [2020-08-21 13:20:03,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:20:03,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 13:20:03,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938898382] [2020-08-21 13:20:03,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 13:20:03,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:03,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 13:20:03,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-08-21 13:20:03,083 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 18 states. [2020-08-21 13:20:04,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:04,016 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2020-08-21 13:20:04,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 13:20:04,016 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-08-21 13:20:04,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:04,018 INFO L225 Difference]: With dead ends: 93 [2020-08-21 13:20:04,018 INFO L226 Difference]: Without dead ends: 82 [2020-08-21 13:20:04,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 13:20:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-21 13:20:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2020-08-21 13:20:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 13:20:04,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-08-21 13:20:04,044 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 57 [2020-08-21 13:20:04,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:04,044 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-08-21 13:20:04,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 13:20:04,044 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-08-21 13:20:04,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-21 13:20:04,046 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:04,046 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:04,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 13:20:04,046 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:04,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:04,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1118751113, now seen corresponding path program 1 times [2020-08-21 13:20:04,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:04,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643144449] [2020-08-21 13:20:04,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 13:20:04,081 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 13:20:04,081 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 13:20:04,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 13:20:04,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:20:04 BoogieIcfgContainer [2020-08-21 13:20:04,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:20:04,115 INFO L168 Benchmark]: Toolchain (without parser) took 12629.62 ms. Allocated memory was 140.5 MB in the beginning and 348.7 MB in the end (delta: 208.1 MB). Free memory was 102.6 MB in the beginning and 104.5 MB in the end (delta: -1.9 MB). Peak memory consumption was 206.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:20:04,116 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 13:20:04,119 INFO L168 Benchmark]: CACSL2BoogieTranslator took 602.81 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 102.4 MB in the beginning and 167.6 MB in the end (delta: -65.2 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. [2020-08-21 13:20:04,120 INFO L168 Benchmark]: Boogie Preprocessor took 61.69 ms. Allocated memory is still 202.9 MB. Free memory was 167.6 MB in the beginning and 164.3 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2020-08-21 13:20:04,120 INFO L168 Benchmark]: RCFGBuilder took 812.77 ms. Allocated memory is still 202.9 MB. Free memory was 164.3 MB in the beginning and 118.9 MB in the end (delta: 45.4 MB). Peak memory consumption was 45.4 MB. Max. memory is 7.1 GB. [2020-08-21 13:20:04,124 INFO L168 Benchmark]: TraceAbstraction took 11146.11 ms. Allocated memory was 202.9 MB in the beginning and 348.7 MB in the end (delta: 145.8 MB). Free memory was 118.3 MB in the beginning and 104.5 MB in the end (delta: 13.8 MB). Peak memory consumption was 159.6 MB. Max. memory is 7.1 GB. [2020-08-21 13:20:04,129 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 602.81 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 102.4 MB in the beginning and 167.6 MB in the end (delta: -65.2 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.69 ms. Allocated memory is still 202.9 MB. Free memory was 167.6 MB in the beginning and 164.3 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 812.77 ms. Allocated memory is still 202.9 MB. Free memory was 164.3 MB in the beginning and 118.9 MB in the end (delta: 45.4 MB). Peak memory consumption was 45.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11146.11 ms. Allocated memory was 202.9 MB in the beginning and 348.7 MB in the end (delta: 145.8 MB). Free memory was 118.3 MB in the beginning and 104.5 MB in the end (delta: 13.8 MB). Peak memory consumption was 159.6 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: 11.0s, OverallIterations: 11, TraceHistogramMax: 4, AutomataDifference: 7.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 375 SDtfs, 460 SDslu, 963 SDs, 0 SdLazy, 5200 SolverSat, 537 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 339 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 48 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.0s 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...