/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/sll_nondet_insert-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:59:38,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:59:38,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:59:38,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:59:38,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:59:38,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:59:38,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:59:38,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:59:38,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:59:38,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:59:38,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:59:38,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:59:38,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:59:38,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:59:38,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:59:38,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:59:38,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:59:38,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:59:38,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:59:38,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:59:38,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:59:38,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:59:38,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:59:38,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:59:38,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 14:59:38,730 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 14:59:38,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 14:59:38,733 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 14:59:38,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 14:59:38,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 14:59:38,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 14:59:38,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 14:59:38,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 14:59:38,737 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 14:59:38,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 14:59:38,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 14:59:38,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 14:59:38,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 14:59:38,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:59:38,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:59:38,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:59:38,744 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 14:59:38,795 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:59:38,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:59:38,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:59:38,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:59:38,798 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:59:38,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:59:38,799 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:59:38,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:59:38,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:59:38,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:59:38,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:59:38,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:59:38,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:59:38,802 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:59:38,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:59:38,802 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:59:38,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:59:38,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:59:38,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:59:38,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:59:38,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:59:38,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:59:38,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:59:38,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:59:38,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:59:38,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:59:38,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:59:38,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:59:38,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:59:38,805 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 14:59:39,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:59:39,328 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:59:39,333 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:59:39,335 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:59:39,336 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:59:39,339 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-1.i [2020-09-24 14:59:39,416 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1727e5e18/b44659a864614d2f869aeccd1ea37bcf/FLAG8131c35ce [2020-09-24 14:59:40,090 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:59:40,091 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-1.i [2020-09-24 14:59:40,112 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1727e5e18/b44659a864614d2f869aeccd1ea37bcf/FLAG8131c35ce [2020-09-24 14:59:40,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1727e5e18/b44659a864614d2f869aeccd1ea37bcf [2020-09-24 14:59:40,321 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:59:40,326 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:59:40,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:59:40,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:59:40,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:59:40,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:59:40" (1/1) ... [2020-09-24 14:59:40,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63983835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:40, skipping insertion in model container [2020-09-24 14:59:40,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:59:40" (1/1) ... [2020-09-24 14:59:40,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:59:40,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:59:40,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:59:40,966 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:59:41,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:59:41,096 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:59:41,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:41 WrapperNode [2020-09-24 14:59:41,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:59:41,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:59:41,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:59:41,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:59:41,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:41" (1/1) ... [2020-09-24 14:59:41,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:41" (1/1) ... [2020-09-24 14:59:41,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:41" (1/1) ... [2020-09-24 14:59:41,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:41" (1/1) ... [2020-09-24 14:59:41,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:41" (1/1) ... [2020-09-24 14:59:41,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:41" (1/1) ... [2020-09-24 14:59:41,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:41" (1/1) ... [2020-09-24 14:59:41,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:59:41,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:59:41,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:59:41,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:59:41,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:41" (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 14:59:41,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:59:41,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:59:41,251 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-24 14:59:41,251 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-24 14:59:41,251 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-24 14:59:41,252 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-09-24 14:59:41,252 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-09-24 14:59:41,252 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-09-24 14:59:41,252 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_insert [2020-09-24 14:59:41,252 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2020-09-24 14:59:41,253 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:59:41,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:59:41,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 14:59:41,253 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-24 14:59:41,254 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-24 14:59:41,254 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 14:59:41,254 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 14:59:41,254 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 14:59:41,254 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 14:59:41,255 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 14:59:41,255 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 14:59:41,255 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 14:59:41,255 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 14:59:41,256 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 14:59:41,256 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 14:59:41,256 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 14:59:41,256 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 14:59:41,256 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 14:59:41,256 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 14:59:41,257 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 14:59:41,257 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 14:59:41,257 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 14:59:41,257 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 14:59:41,257 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 14:59:41,257 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 14:59:41,258 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 14:59:41,258 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 14:59:41,258 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 14:59:41,258 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 14:59:41,258 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 14:59:41,258 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 14:59:41,259 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 14:59:41,259 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 14:59:41,259 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 14:59:41,259 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 14:59:41,259 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 14:59:41,259 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 14:59:41,260 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 14:59:41,260 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 14:59:41,260 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 14:59:41,260 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 14:59:41,260 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 14:59:41,260 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 14:59:41,260 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 14:59:41,261 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 14:59:41,261 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 14:59:41,261 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 14:59:41,261 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 14:59:41,261 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 14:59:41,262 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 14:59:41,262 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 14:59:41,262 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 14:59:41,262 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 14:59:41,262 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 14:59:41,262 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 14:59:41,263 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 14:59:41,263 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 14:59:41,263 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 14:59:41,263 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 14:59:41,263 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-24 14:59:41,263 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 14:59:41,264 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 14:59:41,264 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 14:59:41,264 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-24 14:59:41,264 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 14:59:41,264 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 14:59:41,264 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-24 14:59:41,265 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 14:59:41,265 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 14:59:41,265 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-24 14:59:41,265 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 14:59:41,265 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 14:59:41,266 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 14:59:41,266 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 14:59:41,266 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 14:59:41,266 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 14:59:41,266 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 14:59:41,266 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 14:59:41,267 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 14:59:41,267 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 14:59:41,267 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 14:59:41,267 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 14:59:41,267 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 14:59:41,267 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 14:59:41,268 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 14:59:41,268 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 14:59:41,268 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 14:59:41,268 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 14:59:41,268 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 14:59:41,268 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 14:59:41,268 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 14:59:41,269 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 14:59:41,269 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 14:59:41,269 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 14:59:41,269 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 14:59:41,269 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 14:59:41,269 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 14:59:41,270 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 14:59:41,270 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 14:59:41,270 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 14:59:41,270 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 14:59:41,270 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 14:59:41,270 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 14:59:41,270 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 14:59:41,271 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 14:59:41,271 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 14:59:41,271 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 14:59:41,271 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 14:59:41,271 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-24 14:59:41,271 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-09-24 14:59:41,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 14:59:41,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 14:59:41,272 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-09-24 14:59:41,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 14:59:41,272 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-09-24 14:59:41,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 14:59:41,273 INFO L130 BoogieDeclarations]: Found specification of procedure sll_insert [2020-09-24 14:59:41,273 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2020-09-24 14:59:41,273 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:59:41,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 14:59:41,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-09-24 14:59:41,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:59:41,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:59:41,675 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-24 14:59:41,992 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:59:41,993 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-24 14:59:41,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:59:41 BoogieIcfgContainer [2020-09-24 14:59:41,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:59:42,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:59:42,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:59:42,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:59:42,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:59:40" (1/3) ... [2020-09-24 14:59:42,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33aeea24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:59:42, skipping insertion in model container [2020-09-24 14:59:42,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:41" (2/3) ... [2020-09-24 14:59:42,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33aeea24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:59:42, skipping insertion in model container [2020-09-24 14:59:42,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:59:41" (3/3) ... [2020-09-24 14:59:42,010 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-1.i [2020-09-24 14:59:42,023 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:59:42,034 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 14:59:42,056 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 14:59:42,088 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:59:42,088 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:59:42,088 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:59:42,089 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:59:42,089 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:59:42,089 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:59:42,089 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:59:42,089 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:59:42,116 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states. [2020-09-24 14:59:42,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-24 14:59:42,128 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:42,129 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:42,130 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:42,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:42,138 INFO L82 PathProgramCache]: Analyzing trace with hash 422432984, now seen corresponding path program 1 times [2020-09-24 14:59:42,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:42,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55971850] [2020-09-24 14:59:42,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:42,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:42,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 14:59:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:42,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 14:59:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:42,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:59:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:42,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-24 14:59:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-24 14:59:42,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55971850] [2020-09-24 14:59:42,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:42,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:59:42,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804952111] [2020-09-24 14:59:42,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:59:42,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:42,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:59:42,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:59:42,509 INFO L87 Difference]: Start difference. First operand 142 states. Second operand 4 states. [2020-09-24 14:59:42,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:42,871 INFO L93 Difference]: Finished difference Result 289 states and 337 transitions. [2020-09-24 14:59:42,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 14:59:42,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-09-24 14:59:42,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:42,890 INFO L225 Difference]: With dead ends: 289 [2020-09-24 14:59:42,890 INFO L226 Difference]: Without dead ends: 123 [2020-09-24 14:59:42,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 14:59:42,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-24 14:59:42,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2020-09-24 14:59:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-24 14:59:42,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 123 transitions. [2020-09-24 14:59:42,965 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 123 transitions. Word has length 54 [2020-09-24 14:59:42,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:42,966 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 123 transitions. [2020-09-24 14:59:42,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:59:42,966 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 123 transitions. [2020-09-24 14:59:42,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 14:59:42,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:42,971 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, 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 14:59:42,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:59:42,971 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:42,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:42,972 INFO L82 PathProgramCache]: Analyzing trace with hash 333013349, now seen corresponding path program 1 times [2020-09-24 14:59:42,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:42,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595543692] [2020-09-24 14:59:42,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:43,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:43,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 14:59:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:43,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 14:59:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:43,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-24 14:59:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:43,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-24 14:59:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:43,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595543692] [2020-09-24 14:59:43,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:43,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 14:59:43,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046529002] [2020-09-24 14:59:43,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 14:59:43,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:43,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 14:59:43,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:59:43,349 INFO L87 Difference]: Start difference. First operand 114 states and 123 transitions. Second operand 9 states. [2020-09-24 14:59:44,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:44,263 INFO L93 Difference]: Finished difference Result 275 states and 301 transitions. [2020-09-24 14:59:44,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 14:59:44,264 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-09-24 14:59:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:44,267 INFO L225 Difference]: With dead ends: 275 [2020-09-24 14:59:44,267 INFO L226 Difference]: Without dead ends: 169 [2020-09-24 14:59:44,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2020-09-24 14:59:44,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-24 14:59:44,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2020-09-24 14:59:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-24 14:59:44,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2020-09-24 14:59:44,289 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 69 [2020-09-24 14:59:44,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:44,289 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2020-09-24 14:59:44,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 14:59:44,289 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2020-09-24 14:59:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-24 14:59:44,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:44,292 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, 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 14:59:44,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:59:44,292 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:44,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:44,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1735568478, now seen corresponding path program 1 times [2020-09-24 14:59:44,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:44,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327344445] [2020-09-24 14:59:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:44,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:44,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 14:59:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:44,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 14:59:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:44,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 14:59:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:44,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-24 14:59:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:44,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327344445] [2020-09-24 14:59:44,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:44,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 14:59:44,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523148956] [2020-09-24 14:59:44,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 14:59:44,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:44,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 14:59:44,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-24 14:59:44,540 INFO L87 Difference]: Start difference. First operand 134 states and 145 transitions. Second operand 12 states. [2020-09-24 14:59:45,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:45,780 INFO L93 Difference]: Finished difference Result 313 states and 348 transitions. [2020-09-24 14:59:45,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 14:59:45,781 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-09-24 14:59:45,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:45,789 INFO L225 Difference]: With dead ends: 313 [2020-09-24 14:59:45,789 INFO L226 Difference]: Without dead ends: 206 [2020-09-24 14:59:45,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2020-09-24 14:59:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-24 14:59:45,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 154. [2020-09-24 14:59:45,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-24 14:59:45,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 167 transitions. [2020-09-24 14:59:45,846 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 167 transitions. Word has length 71 [2020-09-24 14:59:45,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:45,847 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 167 transitions. [2020-09-24 14:59:45,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 14:59:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 167 transitions. [2020-09-24 14:59:45,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 14:59:45,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:45,849 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 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 14:59:45,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:59:45,850 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:45,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:45,850 INFO L82 PathProgramCache]: Analyzing trace with hash -472966004, now seen corresponding path program 1 times [2020-09-24 14:59:45,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:45,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826890136] [2020-09-24 14:59:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:45,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:45,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 14:59:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:46,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-24 14:59:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:46,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 14:59:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:46,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 14:59:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:46,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826890136] [2020-09-24 14:59:46,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:46,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 14:59:46,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956286311] [2020-09-24 14:59:46,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 14:59:46,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:46,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 14:59:46,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-24 14:59:46,237 INFO L87 Difference]: Start difference. First operand 154 states and 167 transitions. Second operand 11 states. [2020-09-24 14:59:47,428 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-09-24 14:59:47,564 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-09-24 14:59:47,707 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-09-24 14:59:47,833 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-09-24 14:59:48,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:48,068 INFO L93 Difference]: Finished difference Result 342 states and 375 transitions. [2020-09-24 14:59:48,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 14:59:48,069 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-09-24 14:59:48,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:48,074 INFO L225 Difference]: With dead ends: 342 [2020-09-24 14:59:48,074 INFO L226 Difference]: Without dead ends: 204 [2020-09-24 14:59:48,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2020-09-24 14:59:48,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-24 14:59:48,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 161. [2020-09-24 14:59:48,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-24 14:59:48,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 174 transitions. [2020-09-24 14:59:48,110 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 174 transitions. Word has length 79 [2020-09-24 14:59:48,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:48,110 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 174 transitions. [2020-09-24 14:59:48,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 14:59:48,111 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 174 transitions. [2020-09-24 14:59:48,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-24 14:59:48,113 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:48,113 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, 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 14:59:48,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 14:59:48,113 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:48,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:48,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1820928426, now seen corresponding path program 1 times [2020-09-24 14:59:48,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:48,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446640066] [2020-09-24 14:59:48,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:48,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:48,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 14:59:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:48,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 14:59:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:48,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:59:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:48,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-24 14:59:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:48,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446640066] [2020-09-24 14:59:48,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:48,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 14:59:48,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243736950] [2020-09-24 14:59:48,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 14:59:48,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:48,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 14:59:48,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-09-24 14:59:48,399 INFO L87 Difference]: Start difference. First operand 161 states and 174 transitions. Second operand 14 states. [2020-09-24 14:59:49,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:49,721 INFO L93 Difference]: Finished difference Result 307 states and 339 transitions. [2020-09-24 14:59:49,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 14:59:49,721 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-09-24 14:59:49,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:49,723 INFO L225 Difference]: With dead ends: 307 [2020-09-24 14:59:49,723 INFO L226 Difference]: Without dead ends: 221 [2020-09-24 14:59:49,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2020-09-24 14:59:49,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-24 14:59:49,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 170. [2020-09-24 14:59:49,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-24 14:59:49,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 184 transitions. [2020-09-24 14:59:49,745 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 184 transitions. Word has length 80 [2020-09-24 14:59:49,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:49,747 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 184 transitions. [2020-09-24 14:59:49,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 14:59:49,747 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 184 transitions. [2020-09-24 14:59:49,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-24 14:59:49,754 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:49,755 INFO L422 BasicCegarLoop]: trace histogram [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, 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 14:59:49,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 14:59:49,755 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:49,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:49,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1107353865, now seen corresponding path program 2 times [2020-09-24 14:59:49,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:49,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595189955] [2020-09-24 14:59:49,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:49,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:49,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:49,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 14:59:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:49,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-24 14:59:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:50,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 14:59:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:50,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-24 14:59:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 14:59:50,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595189955] [2020-09-24 14:59:50,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:50,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 14:59:50,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033475576] [2020-09-24 14:59:50,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 14:59:50,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:50,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 14:59:50,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-24 14:59:50,078 INFO L87 Difference]: Start difference. First operand 170 states and 184 transitions. Second operand 14 states. [2020-09-24 14:59:51,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:51,764 INFO L93 Difference]: Finished difference Result 306 states and 337 transitions. [2020-09-24 14:59:51,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 14:59:51,765 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-09-24 14:59:51,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:51,768 INFO L225 Difference]: With dead ends: 306 [2020-09-24 14:59:51,768 INFO L226 Difference]: Without dead ends: 216 [2020-09-24 14:59:51,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2020-09-24 14:59:51,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-24 14:59:51,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 170. [2020-09-24 14:59:51,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-24 14:59:51,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 183 transitions. [2020-09-24 14:59:51,783 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 183 transitions. Word has length 81 [2020-09-24 14:59:51,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:51,783 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 183 transitions. [2020-09-24 14:59:51,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 14:59:51,784 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 183 transitions. [2020-09-24 14:59:51,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-24 14:59:51,785 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:51,786 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:51,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 14:59:51,786 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:51,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:51,786 INFO L82 PathProgramCache]: Analyzing trace with hash -574415326, now seen corresponding path program 2 times [2020-09-24 14:59:51,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:51,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514741445] [2020-09-24 14:59:51,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:51,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:51,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 14:59:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:51,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 14:59:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:52,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-24 14:59:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:52,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-24 14:59:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-24 14:59:52,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514741445] [2020-09-24 14:59:52,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:52,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-24 14:59:52,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479362332] [2020-09-24 14:59:52,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 14:59:52,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:52,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 14:59:52,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-09-24 14:59:52,092 INFO L87 Difference]: Start difference. First operand 170 states and 183 transitions. Second operand 13 states. [2020-09-24 14:59:52,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:52,979 INFO L93 Difference]: Finished difference Result 207 states and 225 transitions. [2020-09-24 14:59:52,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 14:59:52,980 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 89 [2020-09-24 14:59:52,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:52,983 INFO L225 Difference]: With dead ends: 207 [2020-09-24 14:59:52,983 INFO L226 Difference]: Without dead ends: 201 [2020-09-24 14:59:52,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-09-24 14:59:52,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-24 14:59:52,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 183. [2020-09-24 14:59:52,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-09-24 14:59:52,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 200 transitions. [2020-09-24 14:59:52,996 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 200 transitions. Word has length 89 [2020-09-24 14:59:52,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:52,996 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 200 transitions. [2020-09-24 14:59:52,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 14:59:52,996 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 200 transitions. [2020-09-24 14:59:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-24 14:59:52,998 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:52,998 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 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 14:59:52,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 14:59:52,998 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:52,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:52,999 INFO L82 PathProgramCache]: Analyzing trace with hash 263120297, now seen corresponding path program 1 times [2020-09-24 14:59:52,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:52,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076025095] [2020-09-24 14:59:52,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:53,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:53,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 14:59:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:53,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 14:59:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:53,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-24 14:59:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:53,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-24 14:59:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 14:59:53,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076025095] [2020-09-24 14:59:53,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:53,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 14:59:53,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334167001] [2020-09-24 14:59:53,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 14:59:53,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:53,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 14:59:53,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-09-24 14:59:53,339 INFO L87 Difference]: Start difference. First operand 183 states and 200 transitions. Second operand 18 states. [2020-09-24 14:59:54,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:54,709 INFO L93 Difference]: Finished difference Result 239 states and 263 transitions. [2020-09-24 14:59:54,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 14:59:54,711 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 96 [2020-09-24 14:59:54,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:54,713 INFO L225 Difference]: With dead ends: 239 [2020-09-24 14:59:54,713 INFO L226 Difference]: Without dead ends: 233 [2020-09-24 14:59:54,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 14:59:54,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-24 14:59:54,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 209. [2020-09-24 14:59:54,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-09-24 14:59:54,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 232 transitions. [2020-09-24 14:59:54,728 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 232 transitions. Word has length 96 [2020-09-24 14:59:54,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:54,728 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 232 transitions. [2020-09-24 14:59:54,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 14:59:54,729 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 232 transitions. [2020-09-24 14:59:54,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-24 14:59:54,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:54,730 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, 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 14:59:54,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 14:59:54,731 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:54,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:54,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1940597340, now seen corresponding path program 1 times [2020-09-24 14:59:54,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:54,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580500546] [2020-09-24 14:59:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:54,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:54,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 14:59:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:54,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-24 14:59:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:54,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 14:59:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:54,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-24 14:59:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 14:59:55,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580500546] [2020-09-24 14:59:55,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:55,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 14:59:55,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539523781] [2020-09-24 14:59:55,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 14:59:55,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:55,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 14:59:55,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-09-24 14:59:55,008 INFO L87 Difference]: Start difference. First operand 209 states and 232 transitions. Second operand 16 states. [2020-09-24 14:59:56,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:56,853 INFO L93 Difference]: Finished difference Result 358 states and 404 transitions. [2020-09-24 14:59:56,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 14:59:56,854 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-09-24 14:59:56,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:56,856 INFO L225 Difference]: With dead ends: 358 [2020-09-24 14:59:56,856 INFO L226 Difference]: Without dead ends: 245 [2020-09-24 14:59:56,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 14:59:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-09-24 14:59:56,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 176. [2020-09-24 14:59:56,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-24 14:59:56,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 192 transitions. [2020-09-24 14:59:56,891 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 192 transitions. Word has length 97 [2020-09-24 14:59:56,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:56,891 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 192 transitions. [2020-09-24 14:59:56,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 14:59:56,891 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 192 transitions. [2020-09-24 14:59:56,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-24 14:59:56,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:56,893 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:56,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 14:59:56,894 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:56,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:56,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1056708542, now seen corresponding path program 2 times [2020-09-24 14:59:56,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:56,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432998917] [2020-09-24 14:59:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:56,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:56,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 14:59:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:57,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 14:59:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:57,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-24 14:59:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:57,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-24 14:59:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-24 14:59:57,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432998917] [2020-09-24 14:59:57,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:57,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 14:59:57,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278936924] [2020-09-24 14:59:57,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 14:59:57,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:57,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 14:59:57,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-09-24 14:59:57,179 INFO L87 Difference]: Start difference. First operand 176 states and 192 transitions. Second operand 13 states. [2020-09-24 14:59:58,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:58,541 INFO L93 Difference]: Finished difference Result 369 states and 420 transitions. [2020-09-24 14:59:58,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 14:59:58,542 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 103 [2020-09-24 14:59:58,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:58,544 INFO L225 Difference]: With dead ends: 369 [2020-09-24 14:59:58,544 INFO L226 Difference]: Without dead ends: 266 [2020-09-24 14:59:58,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2020-09-24 14:59:58,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-24 14:59:58,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 206. [2020-09-24 14:59:58,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-09-24 14:59:58,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 228 transitions. [2020-09-24 14:59:58,561 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 228 transitions. Word has length 103 [2020-09-24 14:59:58,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:58,561 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 228 transitions. [2020-09-24 14:59:58,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 14:59:58,561 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 228 transitions. [2020-09-24 14:59:58,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-09-24 14:59:58,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:58,563 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:58,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 14:59:58,564 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:58,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:58,564 INFO L82 PathProgramCache]: Analyzing trace with hash 2144765375, now seen corresponding path program 1 times [2020-09-24 14:59:58,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:58,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423438575] [2020-09-24 14:59:58,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:58,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:58,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 14:59:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:58,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 14:59:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:58,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-24 14:59:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:58,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 14:59:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-24 14:59:59,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423438575] [2020-09-24 14:59:59,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:59,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 14:59:59,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438603315] [2020-09-24 14:59:59,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 14:59:59,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:59,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 14:59:59,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-09-24 14:59:59,088 INFO L87 Difference]: Start difference. First operand 206 states and 228 transitions. Second operand 20 states. [2020-09-24 15:00:01,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:00:01,355 INFO L93 Difference]: Finished difference Result 325 states and 381 transitions. [2020-09-24 15:00:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 15:00:01,355 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 105 [2020-09-24 15:00:01,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:00:01,358 INFO L225 Difference]: With dead ends: 325 [2020-09-24 15:00:01,358 INFO L226 Difference]: Without dead ends: 319 [2020-09-24 15:00:01,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2020-09-24 15:00:01,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-09-24 15:00:01,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 256. [2020-09-24 15:00:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-09-24 15:00:01,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 294 transitions. [2020-09-24 15:00:01,389 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 294 transitions. Word has length 105 [2020-09-24 15:00:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:00:01,389 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 294 transitions. [2020-09-24 15:00:01,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 15:00:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 294 transitions. [2020-09-24 15:00:01,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-24 15:00:01,391 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:00:01,392 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:00:01,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 15:00:01,392 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:00:01,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:00:01,393 INFO L82 PathProgramCache]: Analyzing trace with hash -798874772, now seen corresponding path program 2 times [2020-09-24 15:00:01,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:00:01,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764705274] [2020-09-24 15:00:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:00:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:01,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:00:01,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:01,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:00:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:01,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:00:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:01,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-24 15:00:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:01,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:00:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-24 15:00:02,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764705274] [2020-09-24 15:00:02,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:00:02,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 15:00:02,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731513004] [2020-09-24 15:00:02,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 15:00:02,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:00:02,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 15:00:02,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-09-24 15:00:02,182 INFO L87 Difference]: Start difference. First operand 256 states and 294 transitions. Second operand 23 states. [2020-09-24 15:00:04,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:00:04,843 INFO L93 Difference]: Finished difference Result 340 states and 399 transitions. [2020-09-24 15:00:04,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 15:00:04,844 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2020-09-24 15:00:04,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:00:04,847 INFO L225 Difference]: With dead ends: 340 [2020-09-24 15:00:04,847 INFO L226 Difference]: Without dead ends: 330 [2020-09-24 15:00:04,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=172, Invalid=1720, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 15:00:04,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-09-24 15:00:04,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 297. [2020-09-24 15:00:04,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-09-24 15:00:04,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 346 transitions. [2020-09-24 15:00:04,867 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 346 transitions. Word has length 112 [2020-09-24 15:00:04,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:00:04,867 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 346 transitions. [2020-09-24 15:00:04,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 15:00:04,867 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 346 transitions. [2020-09-24 15:00:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-09-24 15:00:04,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:00:04,870 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 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 15:00:04,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 15:00:04,870 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:00:04,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:00:04,871 INFO L82 PathProgramCache]: Analyzing trace with hash -861453783, now seen corresponding path program 2 times [2020-09-24 15:00:04,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:00:04,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350202986] [2020-09-24 15:00:04,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:00:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:04,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:00:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:04,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:00:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:04,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 15:00:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:04,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-24 15:00:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:05,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 15:00:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-24 15:00:05,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350202986] [2020-09-24 15:00:05,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:00:05,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 15:00:05,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047360894] [2020-09-24 15:00:05,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 15:00:05,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:00:05,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 15:00:05,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-09-24 15:00:05,156 INFO L87 Difference]: Start difference. First operand 297 states and 346 transitions. Second operand 15 states. [2020-09-24 15:00:06,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:00:06,892 INFO L93 Difference]: Finished difference Result 542 states and 648 transitions. [2020-09-24 15:00:06,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 15:00:06,893 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 113 [2020-09-24 15:00:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:00:06,896 INFO L225 Difference]: With dead ends: 542 [2020-09-24 15:00:06,896 INFO L226 Difference]: Without dead ends: 407 [2020-09-24 15:00:06,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=262, Invalid=998, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 15:00:06,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-09-24 15:00:06,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 321. [2020-09-24 15:00:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-09-24 15:00:06,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 380 transitions. [2020-09-24 15:00:06,922 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 380 transitions. Word has length 113 [2020-09-24 15:00:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:00:06,923 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 380 transitions. [2020-09-24 15:00:06,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 15:00:06,923 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 380 transitions. [2020-09-24 15:00:06,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-09-24 15:00:06,926 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:00:06,926 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 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 15:00:06,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 15:00:06,926 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:00:06,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:00:06,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1389369769, now seen corresponding path program 3 times [2020-09-24 15:00:06,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:00:06,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84709164] [2020-09-24 15:00:06,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:00:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:07,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:00:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:07,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 15:00:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:07,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-24 15:00:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:07,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-24 15:00:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:07,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 15:00:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:00:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-24 15:00:07,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84709164] [2020-09-24 15:00:07,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:00:07,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 15:00:07,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046567303] [2020-09-24 15:00:07,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 15:00:07,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:00:07,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 15:00:07,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:00:07,321 INFO L87 Difference]: Start difference. First operand 321 states and 380 transitions. Second operand 18 states. [2020-09-24 15:00:09,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:00:09,488 INFO L93 Difference]: Finished difference Result 536 states and 631 transitions. [2020-09-24 15:00:09,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-24 15:00:09,489 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 113 [2020-09-24 15:00:09,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:00:09,493 INFO L225 Difference]: With dead ends: 536 [2020-09-24 15:00:09,493 INFO L226 Difference]: Without dead ends: 377 [2020-09-24 15:00:09,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=219, Invalid=1263, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 15:00:09,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-09-24 15:00:09,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 318. [2020-09-24 15:00:09,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-09-24 15:00:09,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 371 transitions. [2020-09-24 15:00:09,515 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 371 transitions. Word has length 113 [2020-09-24 15:00:09,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:00:09,516 INFO L479 AbstractCegarLoop]: Abstraction has 318 states and 371 transitions. [2020-09-24 15:00:09,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 15:00:09,516 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 371 transitions. [2020-09-24 15:00:09,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-24 15:00:09,518 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:00:09,519 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 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 15:00:09,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 15:00:09,519 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:00:09,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:00:09,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2144590086, now seen corresponding path program 1 times [2020-09-24 15:00:09,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:00:09,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674319830] [2020-09-24 15:00:09,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:00:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 15:00:09,546 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 15:00:09,546 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 15:00:09,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 15:00:09,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 03:00:09 BoogieIcfgContainer [2020-09-24 15:00:09,577 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 15:00:09,580 INFO L168 Benchmark]: Toolchain (without parser) took 29256.60 ms. Allocated memory was 140.5 MB in the beginning and 417.9 MB in the end (delta: 277.3 MB). Free memory was 101.1 MB in the beginning and 91.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 286.7 MB. Max. memory is 7.1 GB. [2020-09-24 15:00:09,580 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 15:00:09,581 INFO L168 Benchmark]: CACSL2BoogieTranslator took 770.11 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 100.5 MB in the beginning and 169.3 MB in the end (delta: -68.9 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2020-09-24 15:00:09,582 INFO L168 Benchmark]: Boogie Preprocessor took 74.06 ms. Allocated memory is still 204.5 MB. Free memory was 169.3 MB in the beginning and 166.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-24 15:00:09,583 INFO L168 Benchmark]: RCFGBuilder took 826.91 ms. Allocated memory is still 204.5 MB. Free memory was 166.6 MB in the beginning and 109.5 MB in the end (delta: 57.1 MB). Peak memory consumption was 57.1 MB. Max. memory is 7.1 GB. [2020-09-24 15:00:09,583 INFO L168 Benchmark]: TraceAbstraction took 27576.79 ms. Allocated memory was 204.5 MB in the beginning and 417.9 MB in the end (delta: 213.4 MB). Free memory was 108.9 MB in the beginning and 91.8 MB in the end (delta: 17.1 MB). Peak memory consumption was 230.5 MB. Max. memory is 7.1 GB. [2020-09-24 15:00:09,586 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 770.11 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 100.5 MB in the beginning and 169.3 MB in the end (delta: -68.9 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 74.06 ms. Allocated memory is still 204.5 MB. Free memory was 169.3 MB in the beginning and 166.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 826.91 ms. Allocated memory is still 204.5 MB. Free memory was 166.6 MB in the beginning and 109.5 MB in the end (delta: 57.1 MB). Peak memory consumption was 57.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 27576.79 ms. Allocated memory was 204.5 MB in the beginning and 417.9 MB in the end (delta: 213.4 MB). Free memory was 108.9 MB in the beginning and 91.8 MB in the end (delta: 17.1 MB). Peak memory consumption was 230.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 630]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L616] CALL, EXPR _get_nondet_int(2, 5) [L609] int len = from; [L610] len < until && __VERIFIER_nondet_int() [L610] len < until && __VERIFIER_nondet_int() [L610] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L613] return len; [L616] RET, EXPR _get_nondet_int(2, 5) [L616] const int len = _get_nondet_int(2, 5); [L617] SLL s = sll_create(len); [L617] CALL, EXPR sll_create(len) [L564] SLL head = ((void *)0); [L565] EXPR len-- [L565] COND TRUE len-- > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L565] EXPR len-- [L565] COND TRUE len-- > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L565] EXPR len-- [L565] COND FALSE !(len-- > 0) [L573] return head; [L617] RET, EXPR sll_create(len) [L617] SLL s = sll_create(len); [L618] CALL, EXPR _get_nondet_int(0, len - 1) [L609] int len = from; [L610] len < until && __VERIFIER_nondet_int() [L610] len < until && __VERIFIER_nondet_int() [L610] COND TRUE len < until && __VERIFIER_nondet_int() [L611] len++ [L610] len < until && __VERIFIER_nondet_int() [L610] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L613] return len; [L618] RET, EXPR _get_nondet_int(0, len - 1) [L618] const int k = _get_nondet_int(0, len - 1); [L619] int i = 0; [L620] i < k && __VERIFIER_nondet_int() [L620] i < k && __VERIFIER_nondet_int() [L620] COND FALSE !(i < k && __VERIFIER_nondet_int()) [L625] EXPR \read(s) [L625] CALL, EXPR sll_length(s) [L576] int len = 0; [L577] COND TRUE \read(head) [L578] len++ [L579] EXPR head->next [L579] head = head->next [L577] COND TRUE \read(head) [L578] len++ [L579] EXPR head->next [L579] head = head->next [L577] COND FALSE !(\read(head)) [L581] return len; [L625] RET, EXPR sll_length(s) [L625] COND TRUE k + len != sll_length(s) [L630] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 153 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 27.4s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 21.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1925 SDtfs, 4078 SDslu, 11505 SDs, 0 SdLazy, 12920 SolverSat, 558 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 589 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 394 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 11.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=321occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 648 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 1377 NumberOfCodeBlocks, 1377 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 1248 ConstructedInterpolants, 0 QuantifiedInterpolants, 573141 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 167/365 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...