/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:59:34,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:59:34,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:59:34,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:59:34,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:59:34,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:59:34,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:59:34,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:59:34,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:59:34,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:59:34,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:59:34,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:59:34,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:59:34,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:59:34,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:59:34,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:59:34,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:59:34,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:59:34,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:59:34,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:59:34,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:59:34,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:59:34,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:59:34,494 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:59:34,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 14:59:34,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 14:59:34,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 14:59:34,513 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 14:59:34,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 14:59:34,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 14:59:34,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 14:59:34,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 14:59:34,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 14:59:34,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 14:59:34,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 14:59:34,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 14:59:34,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 14:59:34,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 14:59:34,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:59:34,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:59:34,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:59:34,527 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 [2020-09-24 14:59:34,571 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:59:34,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:59:34,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:59:34,574 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:59:34,574 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:59:34,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:59:34,575 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:59:34,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:59:34,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:59:34,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:59:34,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:59:34,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:59:34,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:59:34,577 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:59:34,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:59:34,577 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:59:34,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:59:34,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:59:34,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:59:34,578 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:59:34,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:59:34,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:59:34,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:59:34,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:59:34,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:59:34,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:59:34,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:59:34,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:59:34,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:59:34,580 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 14:59:35,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:59:35,044 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:59:35,050 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:59:35,052 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:59:35,052 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:59:35,053 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-09-24 14:59:35,127 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/602d05f3b/3debc6a91da041048697a074913b9f4d/FLAGaeb565168 [2020-09-24 14:59:35,671 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:59:35,672 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-09-24 14:59:35,695 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/602d05f3b/3debc6a91da041048697a074913b9f4d/FLAGaeb565168 [2020-09-24 14:59:35,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/602d05f3b/3debc6a91da041048697a074913b9f4d [2020-09-24 14:59:35,973 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:59:35,980 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:59:35,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:59:35,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:59:35,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:59:35,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:59:35" (1/1) ... [2020-09-24 14:59:35,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@667ad0fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:35, skipping insertion in model container [2020-09-24 14:59:35,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:59:35" (1/1) ... [2020-09-24 14:59:36,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:59:36,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:59:36,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:59:36,620 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:59:36,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:59:36,723 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:59:36,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:36 WrapperNode [2020-09-24 14:59:36,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:59:36,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:59:36,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:59:36,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:59:36,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:36" (1/1) ... [2020-09-24 14:59:36,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:36" (1/1) ... [2020-09-24 14:59:36,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:36" (1/1) ... [2020-09-24 14:59:36,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:36" (1/1) ... [2020-09-24 14:59:36,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:36" (1/1) ... [2020-09-24 14:59:36,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:36" (1/1) ... [2020-09-24 14:59:36,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:36" (1/1) ... [2020-09-24 14:59:36,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:59:36,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:59:36,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:59:36,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:59:36,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:36" (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 [2020-09-24 14:59:36,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:59:36,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:59:36,870 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-24 14:59:36,870 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-24 14:59:36,871 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-24 14:59:36,871 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-09-24 14:59:36,871 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:59:36,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:59:36,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 14:59:36,872 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-24 14:59:36,872 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-24 14:59:36,872 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 14:59:36,872 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 14:59:36,873 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 14:59:36,873 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 14:59:36,873 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 14:59:36,873 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 14:59:36,873 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 14:59:36,874 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 14:59:36,875 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 14:59:36,876 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 14:59:36,876 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 14:59:36,876 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 14:59:36,876 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 14:59:36,878 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 14:59:36,879 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 14:59:36,879 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 14:59:36,879 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 14:59:36,879 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 14:59:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 14:59:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 14:59:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 14:59:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 14:59:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 14:59:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 14:59:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 14:59:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 14:59:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 14:59:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 14:59:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 14:59:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 14:59:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 14:59:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 14:59:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 14:59:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 14:59:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 14:59:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 14:59:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 14:59:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 14:59:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 14:59:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 14:59:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 14:59:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 14:59:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 14:59:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 14:59:36,884 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 14:59:36,884 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 14:59:36,884 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 14:59:36,884 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 14:59:36,884 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 14:59:36,884 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 14:59:36,885 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 14:59:36,885 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 14:59:36,885 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 14:59:36,885 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 14:59:36,885 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-24 14:59:36,885 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 14:59:36,886 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 14:59:36,886 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 14:59:36,886 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-24 14:59:36,886 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 14:59:36,886 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 14:59:36,886 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-24 14:59:36,887 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 14:59:36,887 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 14:59:36,887 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-24 14:59:36,887 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 14:59:36,887 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 14:59:36,887 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 14:59:36,888 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 14:59:36,888 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 14:59:36,888 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 14:59:36,888 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 14:59:36,888 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 14:59:36,888 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 14:59:36,888 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 14:59:36,889 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 14:59:36,889 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 14:59:36,889 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 14:59:36,889 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 14:59:36,889 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 14:59:36,889 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 14:59:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 14:59:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 14:59:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 14:59:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 14:59:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 14:59:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 14:59:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 14:59:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 14:59:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 14:59:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 14:59:36,891 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 14:59:36,891 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 14:59:36,891 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 14:59:36,891 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 14:59:36,891 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 14:59:36,891 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 14:59:36,891 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 14:59:36,891 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 14:59:36,891 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 14:59:36,891 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 14:59:36,892 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 14:59:36,892 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 14:59:36,892 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-24 14:59:36,892 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-09-24 14:59:36,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 14:59:36,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 14:59:36,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 14:59:36,892 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:59:36,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 14:59:36,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 14:59:36,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 14:59:36,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:59:36,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:59:37,238 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-24 14:59:37,507 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:59:37,507 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 14:59:37,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:59:37 BoogieIcfgContainer [2020-09-24 14:59:37,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:59:37,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:59:37,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:59:37,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:59:37,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:59:35" (1/3) ... [2020-09-24 14:59:37,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3691a4b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:59:37, skipping insertion in model container [2020-09-24 14:59:37,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:36" (2/3) ... [2020-09-24 14:59:37,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3691a4b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:59:37, skipping insertion in model container [2020-09-24 14:59:37,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:59:37" (3/3) ... [2020-09-24 14:59:37,524 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-09-24 14:59:37,536 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:59:37,546 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 14:59:37,566 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 14:59:37,594 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:59:37,594 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:59:37,594 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:59:37,594 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:59:37,595 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:59:37,595 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:59:37,595 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:59:37,595 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:59:37,617 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states. [2020-09-24 14:59:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-24 14:59:37,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:37,628 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-09-24 14:59:37,629 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:37,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:37,635 INFO L82 PathProgramCache]: Analyzing trace with hash 136898680, now seen corresponding path program 1 times [2020-09-24 14:59:37,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:37,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840125189] [2020-09-24 14:59:37,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:37,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:37,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:59:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:37,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840125189] [2020-09-24 14:59:37,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:37,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:59:37,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415750839] [2020-09-24 14:59:37,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:59:37,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:37,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:59:37,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:59:37,974 INFO L87 Difference]: Start difference. First operand 101 states. Second operand 4 states. [2020-09-24 14:59:38,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:38,280 INFO L93 Difference]: Finished difference Result 230 states and 265 transitions. [2020-09-24 14:59:38,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 14:59:38,283 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-09-24 14:59:38,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:38,299 INFO L225 Difference]: With dead ends: 230 [2020-09-24 14:59:38,299 INFO L226 Difference]: Without dead ends: 153 [2020-09-24 14:59:38,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:59:38,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-24 14:59:38,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2020-09-24 14:59:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-24 14:59:38,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2020-09-24 14:59:38,365 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 32 [2020-09-24 14:59:38,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:38,365 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2020-09-24 14:59:38,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:59:38,366 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2020-09-24 14:59:38,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-24 14:59:38,368 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:38,368 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-09-24 14:59:38,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:59:38,369 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:38,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:38,369 INFO L82 PathProgramCache]: Analyzing trace with hash 272796752, now seen corresponding path program 1 times [2020-09-24 14:59:38,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:38,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423587793] [2020-09-24 14:59:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:38,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:38,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:38,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:59:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:38,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423587793] [2020-09-24 14:59:38,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:38,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 14:59:38,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902778946] [2020-09-24 14:59:38,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:59:38,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:38,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:59:38,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:59:38,527 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand 7 states. [2020-09-24 14:59:38,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:38,827 INFO L93 Difference]: Finished difference Result 172 states and 190 transitions. [2020-09-24 14:59:38,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 14:59:38,827 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-09-24 14:59:38,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:38,829 INFO L225 Difference]: With dead ends: 172 [2020-09-24 14:59:38,829 INFO L226 Difference]: Without dead ends: 112 [2020-09-24 14:59:38,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-24 14:59:38,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-24 14:59:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-09-24 14:59:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-24 14:59:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2020-09-24 14:59:38,843 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 32 [2020-09-24 14:59:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:38,844 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2020-09-24 14:59:38,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:59:38,844 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2020-09-24 14:59:38,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 14:59:38,846 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:38,846 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:38,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:59:38,846 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:38,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:38,847 INFO L82 PathProgramCache]: Analyzing trace with hash -54471897, now seen corresponding path program 1 times [2020-09-24 14:59:38,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:38,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802580982] [2020-09-24 14:59:38,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:38,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:39,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:59:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:39,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802580982] [2020-09-24 14:59:39,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:39,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 14:59:39,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344423187] [2020-09-24 14:59:39,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 14:59:39,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:39,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 14:59:39,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:59:39,112 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 9 states. [2020-09-24 14:59:39,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:39,440 INFO L93 Difference]: Finished difference Result 193 states and 213 transitions. [2020-09-24 14:59:39,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 14:59:39,441 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-09-24 14:59:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:39,443 INFO L225 Difference]: With dead ends: 193 [2020-09-24 14:59:39,443 INFO L226 Difference]: Without dead ends: 133 [2020-09-24 14:59:39,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-24 14:59:39,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-24 14:59:39,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 114. [2020-09-24 14:59:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-24 14:59:39,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 125 transitions. [2020-09-24 14:59:39,454 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 125 transitions. Word has length 51 [2020-09-24 14:59:39,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:39,455 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 125 transitions. [2020-09-24 14:59:39,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 14:59:39,455 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 125 transitions. [2020-09-24 14:59:39,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-24 14:59:39,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:39,458 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:39,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:59:39,458 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:39,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:39,459 INFO L82 PathProgramCache]: Analyzing trace with hash -586426640, now seen corresponding path program 2 times [2020-09-24 14:59:39,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:39,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813868624] [2020-09-24 14:59:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:39,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:39,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:59:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:39,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813868624] [2020-09-24 14:59:39,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:39,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 14:59:39,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732470710] [2020-09-24 14:59:39,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:59:39,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:39,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:59:39,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:59:39,700 INFO L87 Difference]: Start difference. First operand 114 states and 125 transitions. Second operand 7 states. [2020-09-24 14:59:39,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:39,978 INFO L93 Difference]: Finished difference Result 195 states and 215 transitions. [2020-09-24 14:59:39,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 14:59:39,978 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-09-24 14:59:39,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:39,980 INFO L225 Difference]: With dead ends: 195 [2020-09-24 14:59:39,980 INFO L226 Difference]: Without dead ends: 114 [2020-09-24 14:59:39,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:59:39,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-24 14:59:39,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-09-24 14:59:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-24 14:59:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2020-09-24 14:59:39,991 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 70 [2020-09-24 14:59:39,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:39,992 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2020-09-24 14:59:39,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:59:39,992 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2020-09-24 14:59:39,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-24 14:59:39,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:39,995 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:39,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 14:59:39,995 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:39,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:39,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1356086606, now seen corresponding path program 1 times [2020-09-24 14:59:39,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:39,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132556498] [2020-09-24 14:59:39,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:40,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:40,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:59:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:40,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132556498] [2020-09-24 14:59:40,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:40,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 14:59:40,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761615503] [2020-09-24 14:59:40,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 14:59:40,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:40,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 14:59:40,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-24 14:59:40,231 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand 11 states. [2020-09-24 14:59:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:40,665 INFO L93 Difference]: Finished difference Result 214 states and 233 transitions. [2020-09-24 14:59:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 14:59:40,665 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-09-24 14:59:40,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:40,668 INFO L225 Difference]: With dead ends: 214 [2020-09-24 14:59:40,668 INFO L226 Difference]: Without dead ends: 154 [2020-09-24 14:59:40,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-09-24 14:59:40,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-24 14:59:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 135. [2020-09-24 14:59:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-24 14:59:40,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 146 transitions. [2020-09-24 14:59:40,687 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 146 transitions. Word has length 71 [2020-09-24 14:59:40,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:40,690 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 146 transitions. [2020-09-24 14:59:40,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 14:59:40,690 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 146 transitions. [2020-09-24 14:59:40,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-24 14:59:40,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:40,699 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2020-09-24 14:59:40,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 14:59:40,700 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:40,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:40,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1395228995, now seen corresponding path program 2 times [2020-09-24 14:59:40,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:40,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770349040] [2020-09-24 14:59:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:40,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:40,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:59:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:41,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770349040] [2020-09-24 14:59:41,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:41,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 14:59:41,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798040135] [2020-09-24 14:59:41,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 14:59:41,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:41,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 14:59:41,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-24 14:59:41,060 INFO L87 Difference]: Start difference. First operand 135 states and 146 transitions. Second operand 13 states. [2020-09-24 14:59:41,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:41,461 INFO L93 Difference]: Finished difference Result 235 states and 255 transitions. [2020-09-24 14:59:41,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 14:59:41,461 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 91 [2020-09-24 14:59:41,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:41,463 INFO L225 Difference]: With dead ends: 235 [2020-09-24 14:59:41,464 INFO L226 Difference]: Without dead ends: 175 [2020-09-24 14:59:41,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-09-24 14:59:41,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-24 14:59:41,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 156. [2020-09-24 14:59:41,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-24 14:59:41,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 168 transitions. [2020-09-24 14:59:41,473 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 168 transitions. Word has length 91 [2020-09-24 14:59:41,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:41,473 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 168 transitions. [2020-09-24 14:59:41,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 14:59:41,474 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 168 transitions. [2020-09-24 14:59:41,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-24 14:59:41,475 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:41,476 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1] [2020-09-24 14:59:41,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 14:59:41,476 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:41,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:41,477 INFO L82 PathProgramCache]: Analyzing trace with hash 274581320, now seen corresponding path program 3 times [2020-09-24 14:59:41,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:41,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102640118] [2020-09-24 14:59:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:41,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:41,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:59:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:41,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102640118] [2020-09-24 14:59:41,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:41,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 14:59:41,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901516705] [2020-09-24 14:59:41,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 14:59:41,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:41,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 14:59:41,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-24 14:59:41,880 INFO L87 Difference]: Start difference. First operand 156 states and 168 transitions. Second operand 15 states. [2020-09-24 14:59:42,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:42,385 INFO L93 Difference]: Finished difference Result 256 states and 277 transitions. [2020-09-24 14:59:42,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 14:59:42,386 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 111 [2020-09-24 14:59:42,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:42,388 INFO L225 Difference]: With dead ends: 256 [2020-09-24 14:59:42,389 INFO L226 Difference]: Without dead ends: 196 [2020-09-24 14:59:42,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-09-24 14:59:42,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-24 14:59:42,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 177. [2020-09-24 14:59:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-24 14:59:42,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 190 transitions. [2020-09-24 14:59:42,399 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 190 transitions. Word has length 111 [2020-09-24 14:59:42,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:42,399 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 190 transitions. [2020-09-24 14:59:42,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 14:59:42,399 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 190 transitions. [2020-09-24 14:59:42,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-24 14:59:42,401 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:42,401 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1] [2020-09-24 14:59:42,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 14:59:42,402 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:42,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:42,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1182686291, now seen corresponding path program 4 times [2020-09-24 14:59:42,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:42,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732762618] [2020-09-24 14:59:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:42,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:42,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:59:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 118 proven. 19 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-09-24 14:59:42,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732762618] [2020-09-24 14:59:42,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:42,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 14:59:42,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481232745] [2020-09-24 14:59:42,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 14:59:42,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:42,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 14:59:42,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:59:42,940 INFO L87 Difference]: Start difference. First operand 177 states and 190 transitions. Second operand 17 states. [2020-09-24 14:59:43,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:43,885 INFO L93 Difference]: Finished difference Result 308 states and 334 transitions. [2020-09-24 14:59:43,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 14:59:43,885 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 131 [2020-09-24 14:59:43,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:43,888 INFO L225 Difference]: With dead ends: 308 [2020-09-24 14:59:43,888 INFO L226 Difference]: Without dead ends: 253 [2020-09-24 14:59:43,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2020-09-24 14:59:43,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-24 14:59:43,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 183. [2020-09-24 14:59:43,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-09-24 14:59:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 197 transitions. [2020-09-24 14:59:43,898 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 197 transitions. Word has length 131 [2020-09-24 14:59:43,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:43,898 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 197 transitions. [2020-09-24 14:59:43,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 14:59:43,898 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 197 transitions. [2020-09-24 14:59:43,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-24 14:59:43,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:43,900 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:43,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 14:59:43,901 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:43,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:43,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1200683152, now seen corresponding path program 1 times [2020-09-24 14:59:43,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:43,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591975517] [2020-09-24 14:59:43,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:44,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:44,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:59:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 118 proven. 19 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-09-24 14:59:44,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591975517] [2020-09-24 14:59:44,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:44,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 14:59:44,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114477790] [2020-09-24 14:59:44,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 14:59:44,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:44,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 14:59:44,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-09-24 14:59:44,653 INFO L87 Difference]: Start difference. First operand 183 states and 197 transitions. Second operand 18 states. [2020-09-24 14:59:45,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:45,878 INFO L93 Difference]: Finished difference Result 286 states and 310 transitions. [2020-09-24 14:59:45,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 14:59:45,879 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 133 [2020-09-24 14:59:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:45,880 INFO L225 Difference]: With dead ends: 286 [2020-09-24 14:59:45,881 INFO L226 Difference]: Without dead ends: 231 [2020-09-24 14:59:45,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 14:59:45,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-24 14:59:45,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 187. [2020-09-24 14:59:45,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-09-24 14:59:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 201 transitions. [2020-09-24 14:59:45,893 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 201 transitions. Word has length 133 [2020-09-24 14:59:45,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:45,895 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 201 transitions. [2020-09-24 14:59:45,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 14:59:45,898 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 201 transitions. [2020-09-24 14:59:45,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-24 14:59:45,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:45,900 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:45,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 14:59:45,900 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:45,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:45,901 INFO L82 PathProgramCache]: Analyzing trace with hash 2062394754, now seen corresponding path program 1 times [2020-09-24 14:59:45,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:45,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286199926] [2020-09-24 14:59:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:46,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:46,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:59:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 118 proven. 19 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-09-24 14:59:46,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286199926] [2020-09-24 14:59:46,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:46,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 14:59:46,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857626374] [2020-09-24 14:59:46,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 14:59:46,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:46,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 14:59:46,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:59:46,495 INFO L87 Difference]: Start difference. First operand 187 states and 201 transitions. Second operand 17 states. [2020-09-24 14:59:47,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:47,433 INFO L93 Difference]: Finished difference Result 281 states and 301 transitions. [2020-09-24 14:59:47,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 14:59:47,434 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 135 [2020-09-24 14:59:47,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:47,436 INFO L225 Difference]: With dead ends: 281 [2020-09-24 14:59:47,436 INFO L226 Difference]: Without dead ends: 253 [2020-09-24 14:59:47,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2020-09-24 14:59:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-24 14:59:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 195. [2020-09-24 14:59:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-09-24 14:59:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2020-09-24 14:59:47,445 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 135 [2020-09-24 14:59:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:47,446 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2020-09-24 14:59:47,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 14:59:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2020-09-24 14:59:47,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-24 14:59:47,447 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:47,448 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:47,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 14:59:47,448 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:47,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:47,449 INFO L82 PathProgramCache]: Analyzing trace with hash -414346707, now seen corresponding path program 1 times [2020-09-24 14:59:47,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:47,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151123744] [2020-09-24 14:59:47,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 14:59:47,536 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 14:59:47,536 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 14:59:47,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 14:59:47,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 02:59:47 BoogieIcfgContainer [2020-09-24 14:59:47,567 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 14:59:47,571 INFO L168 Benchmark]: Toolchain (without parser) took 11593.99 ms. Allocated memory was 138.9 MB in the beginning and 366.0 MB in the end (delta: 227.0 MB). Free memory was 100.5 MB in the beginning and 90.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 237.2 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:47,571 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 14:59:47,572 INFO L168 Benchmark]: CACSL2BoogieTranslator took 743.57 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 99.9 MB in the beginning and 167.5 MB in the end (delta: -67.5 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:47,573 INFO L168 Benchmark]: Boogie Preprocessor took 71.72 ms. Allocated memory is still 201.9 MB. Free memory was 167.5 MB in the beginning and 164.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:47,574 INFO L168 Benchmark]: RCFGBuilder took 719.08 ms. Allocated memory is still 201.9 MB. Free memory was 164.8 MB in the beginning and 113.6 MB in the end (delta: 51.2 MB). Peak memory consumption was 51.2 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:47,575 INFO L168 Benchmark]: TraceAbstraction took 10050.33 ms. Allocated memory was 201.9 MB in the beginning and 366.0 MB in the end (delta: 164.1 MB). Free memory was 113.6 MB in the beginning and 90.4 MB in the end (delta: 23.2 MB). Peak memory consumption was 187.3 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:47,578 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 743.57 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 99.9 MB in the beginning and 167.5 MB in the end (delta: -67.5 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.72 ms. Allocated memory is still 201.9 MB. Free memory was 167.5 MB in the beginning and 164.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 719.08 ms. Allocated memory is still 201.9 MB. Free memory was 164.8 MB in the beginning and 113.6 MB in the end (delta: 51.2 MB). Peak memory consumption was 51.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10050.33 ms. Allocated memory was 201.9 MB in the beginning and 366.0 MB in the end (delta: 164.1 MB). Free memory was 113.6 MB in the beginning and 90.4 MB in the end (delta: 23.2 MB). Peak memory consumption was 187.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 605]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L588] const int len = 5; [L589] CALL, EXPR dll_create(len) [L568] DLL head = ((void *)0); [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND FALSE !(\read(head)) [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND FALSE !(len > 0) [L585] return head; [L589] RET, EXPR dll_create(len) [L589] DLL head = dll_create(len); [L590] head->next [L590] COND TRUE head->next [L591] EXPR head->data_0 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] EXPR head->data_1 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] EXPR head->data_2 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L605] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 112 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.9s, OverallIterations: 11, TraceHistogramMax: 5, AutomataDifference: 5.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 920 SDtfs, 1500 SDslu, 6084 SDs, 0 SdLazy, 3402 SolverSat, 234 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 260 GetRequests, 63 SyntacticMatches, 8 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=195occurred in iteration=10, 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, 328 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 992 NumberOfCodeBlocks, 992 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 847 ConstructedInterpolants, 0 QuantifiedInterpolants, 334431 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 554/828 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...