/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:27:26,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:27:26,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:27:26,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:27:26,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:27:26,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:27:26,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:27:26,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:27:26,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:27:26,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:27:26,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:27:26,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:27:26,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:27:26,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:27:26,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:27:26,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:27:26,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:27:26,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:27:26,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:27:26,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:27:26,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:27:26,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:27:26,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:27:26,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:27:26,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:27:26,079 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:27:26,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:27:26,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:27:26,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:27:26,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:27:26,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:27:26,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:27:26,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:27:26,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:27:26,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:27:26,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:27:26,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:27:26,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:27:26,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:27:26,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:27:26,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:27:26,099 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 [2020-09-21 12:27:26,164 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:27:26,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:27:26,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:27:26,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:27:26,169 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:27:26,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:27:26,171 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:27:26,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:27:26,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:27:26,171 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:27:26,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:27:26,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:27:26,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:27:26,173 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:27:26,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:27:26,173 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:27:26,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:27:26,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:27:26,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:27:26,174 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:27:26,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:27:26,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:27:26,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:27:26,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:27:26,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:27:26,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:27:26,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:27:26,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:27:26,176 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:27:26,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:27:26,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:27:26,689 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:27:26,693 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:27:26,695 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:27:26,696 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:27:26,697 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-09-21 12:27:26,783 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e225d40e5/6498deb5c44645b6aeb3a8d44dd80f80/FLAGd4377fb8c [2020-09-21 12:27:27,400 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:27:27,401 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-09-21 12:27:27,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e225d40e5/6498deb5c44645b6aeb3a8d44dd80f80/FLAGd4377fb8c [2020-09-21 12:27:27,667 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e225d40e5/6498deb5c44645b6aeb3a8d44dd80f80 [2020-09-21 12:27:27,683 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:27:27,688 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:27:27,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:27:27,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:27:27,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:27:27,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:27:27" (1/1) ... [2020-09-21 12:27:27,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@603d5fa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:27, skipping insertion in model container [2020-09-21 12:27:27,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:27:27" (1/1) ... [2020-09-21 12:27:27,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:27:27,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:27:28,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:27:28,282 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:27:28,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:27:28,445 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:27:28,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:28 WrapperNode [2020-09-21 12:27:28,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:27:28,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:27:28,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:27:28,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:27:28,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:28" (1/1) ... [2020-09-21 12:27:28,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:28" (1/1) ... [2020-09-21 12:27:28,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:28" (1/1) ... [2020-09-21 12:27:28,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:28" (1/1) ... [2020-09-21 12:27:28,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:28" (1/1) ... [2020-09-21 12:27:28,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:28" (1/1) ... [2020-09-21 12:27:28,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:28" (1/1) ... [2020-09-21 12:27:28,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:27:28,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:27:28,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:27:28,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:27:28,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:28" (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 [2020-09-21 12:27:28,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:27:28,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:27:28,608 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-21 12:27:28,608 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-21 12:27:28,609 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-21 12:27:28,609 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-09-21 12:27:28,609 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:27:28,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:27:28,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:27:28,610 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-21 12:27:28,610 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-21 12:27:28,610 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-21 12:27:28,610 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-21 12:27:28,611 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-21 12:27:28,611 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-21 12:27:28,611 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-21 12:27:28,611 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-21 12:27:28,611 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-21 12:27:28,612 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-21 12:27:28,612 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-21 12:27:28,612 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-21 12:27:28,612 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-21 12:27:28,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-21 12:27:28,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-21 12:27:28,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-21 12:27:28,613 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-21 12:27:28,613 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-21 12:27:28,614 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-21 12:27:28,614 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-21 12:27:28,614 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-21 12:27:28,614 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-21 12:27:28,614 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-21 12:27:28,614 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-21 12:27:28,615 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-21 12:27:28,615 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-21 12:27:28,615 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-21 12:27:28,615 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-21 12:27:28,615 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-21 12:27:28,615 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-21 12:27:28,616 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-21 12:27:28,616 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-21 12:27:28,616 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-21 12:27:28,616 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-21 12:27:28,616 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-21 12:27:28,616 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-21 12:27:28,617 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-21 12:27:28,617 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-21 12:27:28,617 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-21 12:27:28,617 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-21 12:27:28,617 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-21 12:27:28,618 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-21 12:27:28,618 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-21 12:27:28,618 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-21 12:27:28,618 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-21 12:27:28,618 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-21 12:27:28,619 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-21 12:27:28,619 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-21 12:27:28,619 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-21 12:27:28,619 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-21 12:27:28,619 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-21 12:27:28,619 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-21 12:27:28,620 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 12:27:28,620 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 12:27:28,620 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 12:27:28,620 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 12:27:28,620 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-21 12:27:28,620 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-21 12:27:28,621 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 12:27:28,621 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-21 12:27:28,621 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-21 12:27:28,621 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:27:28,621 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-21 12:27:28,622 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-21 12:27:28,622 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-21 12:27:28,622 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 12:27:28,622 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-21 12:27:28,622 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-21 12:27:28,622 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-21 12:27:28,623 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-21 12:27:28,623 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-21 12:27:28,623 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-21 12:27:28,623 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-21 12:27:28,623 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-21 12:27:28,623 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-21 12:27:28,623 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-21 12:27:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-21 12:27:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-21 12:27:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-21 12:27:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-21 12:27:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-21 12:27:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-21 12:27:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-21 12:27:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-21 12:27:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-21 12:27:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-21 12:27:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-21 12:27:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-21 12:27:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-21 12:27:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-21 12:27:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-21 12:27:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-21 12:27:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-21 12:27:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-21 12:27:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-21 12:27:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-21 12:27:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-21 12:27:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-21 12:27:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-21 12:27:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-21 12:27:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-21 12:27:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-21 12:27:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-21 12:27:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-21 12:27:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-21 12:27:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-21 12:27:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-09-21 12:27:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 12:27:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 12:27:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 12:27:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:27:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 12:27:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 12:27:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:27:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:27:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:27:28,981 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-21 12:27:29,244 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:27:29,244 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-21 12:27:29,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:27:29 BoogieIcfgContainer [2020-09-21 12:27:29,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:27:29,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:27:29,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:27:29,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:27:29,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:27:27" (1/3) ... [2020-09-21 12:27:29,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21dd0b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:27:29, skipping insertion in model container [2020-09-21 12:27:29,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:28" (2/3) ... [2020-09-21 12:27:29,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21dd0b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:27:29, skipping insertion in model container [2020-09-21 12:27:29,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:27:29" (3/3) ... [2020-09-21 12:27:29,260 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-09-21 12:27:29,272 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:27:29,283 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:27:29,306 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:27:29,334 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:27:29,334 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:27:29,334 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:27:29,334 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:27:29,334 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:27:29,335 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:27:29,335 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:27:29,335 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:27:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-09-21 12:27:29,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 12:27:29,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:29,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:29,383 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:29,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:29,393 INFO L82 PathProgramCache]: Analyzing trace with hash 248267832, now seen corresponding path program 1 times [2020-09-21 12:27:29,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:29,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315917166] [2020-09-21 12:27:29,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:29,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:29,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:30,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:30,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:27:30,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:27:30,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-09-21 12:27:30,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:30,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:27:30,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-21 12:27:30,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 12:27:30,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:27:30,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:30,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:30,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:30,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:30,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:30,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 12:27:30,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:30,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:30,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:30,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:30,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:30,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:27:30,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:30,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:30,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:30,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:27:30,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:30,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 12:27:30,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:30,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:30,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:30,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:30,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:27:30,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315917166] [2020-09-21 12:27:30,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:27:30,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:27:30,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551096294] [2020-09-21 12:27:30,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:27:30,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:30,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:27:30,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:27:30,414 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 6 states. [2020-09-21 12:27:30,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:30,885 INFO L93 Difference]: Finished difference Result 91 states and 132 transitions. [2020-09-21 12:27:30,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:27:30,887 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-09-21 12:27:30,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:30,903 INFO L225 Difference]: With dead ends: 91 [2020-09-21 12:27:30,903 INFO L226 Difference]: Without dead ends: 58 [2020-09-21 12:27:30,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:27:30,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-21 12:27:30,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 35. [2020-09-21 12:27:30,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-21 12:27:30,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-09-21 12:27:30,964 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 20 [2020-09-21 12:27:30,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:30,965 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-09-21 12:27:30,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:27:30,965 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-09-21 12:27:30,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 12:27:30,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:30,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:30,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:27:30,973 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:30,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:30,974 INFO L82 PathProgramCache]: Analyzing trace with hash 248265910, now seen corresponding path program 1 times [2020-09-21 12:27:30,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:30,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815125910] [2020-09-21 12:27:30,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:31,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:31,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:31,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:27:31,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:31,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-09-21 12:27:31,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:31,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:27:31,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:27:31,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:27:31,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:31,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:31,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:31,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:31,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:31,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:31,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:27:31,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:31,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:31,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:31,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:31,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:31,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:27:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:31,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:31,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:31,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:27:31,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:31,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-21 12:27:31,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:31,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:27:31,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:27:31,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:27:31,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:27:31,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815125910] [2020-09-21 12:27:31,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:27:31,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 12:27:31,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206822237] [2020-09-21 12:27:31,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:27:31,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:31,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:27:31,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:27:31,296 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 7 states. [2020-09-21 12:27:31,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:31,650 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2020-09-21 12:27:31,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:27:31,651 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-09-21 12:27:31,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:31,653 INFO L225 Difference]: With dead ends: 62 [2020-09-21 12:27:31,653 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 12:27:31,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:27:31,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 12:27:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-09-21 12:27:31,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 12:27:31,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-09-21 12:27:31,663 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 20 [2020-09-21 12:27:31,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:31,663 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-09-21 12:27:31,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:27:31,664 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-09-21 12:27:31,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 12:27:31,666 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:31,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:31,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:27:31,667 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:31,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:31,667 INFO L82 PathProgramCache]: Analyzing trace with hash 215855051, now seen corresponding path program 1 times [2020-09-21 12:27:31,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:31,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410576264] [2020-09-21 12:27:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:31,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:31,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:32,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:32,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 12:27:32,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:27:32,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 464 [2020-09-21 12:27:32,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:32,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:27:32,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 12:27:32,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:27:32,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:32,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:32,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:32,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:32,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:32,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:32,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:27:32,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:32,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:32,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:32,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:32,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:32,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:27:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:32,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:32,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:32,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 12:27:32,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:32,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-09-21 12:27:32,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:32,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:27:32,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:27:32,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:27:32,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:27:32,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410576264] [2020-09-21 12:27:32,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:27:32,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:27:32,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765793181] [2020-09-21 12:27:32,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:27:32,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:32,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:27:32,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:27:32,435 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 5 states. [2020-09-21 12:27:32,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:32,693 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2020-09-21 12:27:32,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:27:32,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-21 12:27:32,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:32,695 INFO L225 Difference]: With dead ends: 69 [2020-09-21 12:27:32,695 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 12:27:32,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:27:32,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 12:27:32,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-09-21 12:27:32,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 12:27:32,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-09-21 12:27:32,718 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 27 [2020-09-21 12:27:32,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:32,719 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-09-21 12:27:32,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:27:32,719 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-09-21 12:27:32,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 12:27:32,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:32,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:32,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:27:32,725 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:32,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:32,725 INFO L82 PathProgramCache]: Analyzing trace with hash -795262199, now seen corresponding path program 1 times [2020-09-21 12:27:32,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:32,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639519208] [2020-09-21 12:27:32,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:32,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:32,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:33,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:33,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:33,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:33,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 12:27:33,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:27:33,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-09-21 12:27:33,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:33,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:27:33,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:27:33,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:27:33,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:33,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:33,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:33,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:33,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:33,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:33,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 12:27:33,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:33,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:33,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:33,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:33,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:33,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:27:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:33,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:34,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:34,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 12:27:34,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:34,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-09-21 12:27:34,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:34,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:27:34,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:27:34,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 12:27:34,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:27:34,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639519208] [2020-09-21 12:27:34,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:34,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:27:34,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447048464] [2020-09-21 12:27:34,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:27:34,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:34,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:27:34,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:27:34,098 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 8 states. [2020-09-21 12:27:34,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:34,361 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2020-09-21 12:27:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:27:34,362 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-09-21 12:27:34,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:34,363 INFO L225 Difference]: With dead ends: 69 [2020-09-21 12:27:34,364 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 12:27:34,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:27:34,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 12:27:34,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-09-21 12:27:34,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-21 12:27:34,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-09-21 12:27:34,379 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 27 [2020-09-21 12:27:34,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:34,381 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-09-21 12:27:34,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:27:34,381 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-09-21 12:27:34,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 12:27:34,382 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:34,383 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] [2020-09-21 12:27:34,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:27:34,383 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:34,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:34,384 INFO L82 PathProgramCache]: Analyzing trace with hash 260011544, now seen corresponding path program 1 times [2020-09-21 12:27:34,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:34,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184250120] [2020-09-21 12:27:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:34,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:34,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:35,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:35,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-21 12:27:35,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:27:35,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-21 12:27:35,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:35,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:27:35,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:27:35,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 12:27:35,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:35,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:35,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:35,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:35,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:35,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:35,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:27:35,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:35,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:35,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:35,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:35,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:35,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:27:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:35,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:35,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:35,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 12:27:35,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:35,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-09-21 12:27:35,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:35,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:27:35,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:27:35,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 12:27:35,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:27:35,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184250120] [2020-09-21 12:27:35,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:35,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:27:35,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627025132] [2020-09-21 12:27:35,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:27:35,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:35,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:27:35,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:27:35,939 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 9 states. [2020-09-21 12:27:36,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:36,260 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2020-09-21 12:27:36,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:27:36,261 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-09-21 12:27:36,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:36,263 INFO L225 Difference]: With dead ends: 76 [2020-09-21 12:27:36,264 INFO L226 Difference]: Without dead ends: 56 [2020-09-21 12:27:36,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:27:36,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-21 12:27:36,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-09-21 12:27:36,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-21 12:27:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-09-21 12:27:36,286 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 34 [2020-09-21 12:27:36,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:36,287 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-09-21 12:27:36,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:27:36,288 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-09-21 12:27:36,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 12:27:36,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:36,292 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:36,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:27:36,293 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:36,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:36,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1408992297, now seen corresponding path program 2 times [2020-09-21 12:27:36,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:36,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799309456] [2020-09-21 12:27:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:36,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:36,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:37,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:37,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-21 12:27:37,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:27:37,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1049 [2020-09-21 12:27:37,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:37,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:27:37,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:27:37,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-21 12:27:37,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:37,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:37,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:37,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:37,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:37,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:37,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:27:37,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:37,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:37,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:37,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:37,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:37,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:27:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:37,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:38,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:38,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 12:27:38,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:38,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-09-21 12:27:38,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:38,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:27:38,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:27:38,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-21 12:27:38,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:27:38,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799309456] [2020-09-21 12:27:38,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:38,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:27:38,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314375746] [2020-09-21 12:27:38,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:27:38,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:38,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:27:38,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:27:38,243 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 10 states. [2020-09-21 12:27:38,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:38,498 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-09-21 12:27:38,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:27:38,498 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-09-21 12:27:38,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:38,500 INFO L225 Difference]: With dead ends: 83 [2020-09-21 12:27:38,500 INFO L226 Difference]: Without dead ends: 63 [2020-09-21 12:27:38,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:27:38,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-21 12:27:38,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-09-21 12:27:38,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-21 12:27:38,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-09-21 12:27:38,516 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 41 [2020-09-21 12:27:38,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:38,516 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-09-21 12:27:38,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:27:38,517 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-09-21 12:27:38,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-21 12:27:38,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:38,520 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:38,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:27:38,520 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:38,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:38,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2107133704, now seen corresponding path program 3 times [2020-09-21 12:27:38,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:38,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882526877] [2020-09-21 12:27:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:38,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:39,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:39,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:39,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-21 12:27:39,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:27:39,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-09-21 12:27:39,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:39,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:27:39,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:27:39,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-21 12:27:39,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 34 [2020-09-21 12:27:39,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:39,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:39,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:39,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:39,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:39,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:39,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:27:39,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:39,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:39,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:39,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:39,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:39,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:27:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:39,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:40,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:40,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 12:27:40,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:40,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-09-21 12:27:40,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:40,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:27:40,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:27:40,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-21 12:27:40,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:27:40,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882526877] [2020-09-21 12:27:40,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:40,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 12:27:40,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973172428] [2020-09-21 12:27:40,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:27:40,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:40,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:27:40,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:27:40,932 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 11 states. [2020-09-21 12:27:41,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:41,235 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2020-09-21 12:27:41,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 12:27:41,236 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-09-21 12:27:41,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:41,238 INFO L225 Difference]: With dead ends: 90 [2020-09-21 12:27:41,238 INFO L226 Difference]: Without dead ends: 70 [2020-09-21 12:27:41,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:27:41,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-21 12:27:41,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-21 12:27:41,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-21 12:27:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-09-21 12:27:41,253 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 48 [2020-09-21 12:27:41,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:41,254 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-09-21 12:27:41,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:27:41,256 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-09-21 12:27:41,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 12:27:41,257 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:41,257 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:41,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:27:41,258 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:41,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:41,259 INFO L82 PathProgramCache]: Analyzing trace with hash 893734217, now seen corresponding path program 4 times [2020-09-21 12:27:41,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:41,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264859013] [2020-09-21 12:27:41,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:41,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:42,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:42,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-21 12:27:42,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:42,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1056 [2020-09-21 12:27:42,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:42,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 12:27:42,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-09-21 12:27:42,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 12:27:42,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:42,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:42,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:42,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:42,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:42,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:42,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:27:42,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:42,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:42,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:42,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:42,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:42,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:27:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:42,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:43,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:43,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 12:27:43,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:43,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1047 [2020-09-21 12:27:43,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:43,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 12:27:43,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:43,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-21 12:27:43,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-21 12:27:43,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264859013] [2020-09-21 12:27:43,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:43,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 12:27:43,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931442508] [2020-09-21 12:27:43,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 12:27:43,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:43,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 12:27:43,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:27:43,777 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 14 states. [2020-09-21 12:27:44,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:44,254 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2020-09-21 12:27:44,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 12:27:44,255 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-09-21 12:27:44,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:44,256 INFO L225 Difference]: With dead ends: 83 [2020-09-21 12:27:44,256 INFO L226 Difference]: Without dead ends: 78 [2020-09-21 12:27:44,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-09-21 12:27:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-21 12:27:44,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2020-09-21 12:27:44,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-21 12:27:44,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2020-09-21 12:27:44,272 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 55 [2020-09-21 12:27:44,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:44,272 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2020-09-21 12:27:44,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 12:27:44,275 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2020-09-21 12:27:44,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 12:27:44,276 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:44,276 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:44,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:27:44,278 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:44,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:44,279 INFO L82 PathProgramCache]: Analyzing trace with hash 895583181, now seen corresponding path program 1 times [2020-09-21 12:27:44,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:44,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382482549] [2020-09-21 12:27:44,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:27:44,358 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:27:44,359 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:27:44,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:27:44,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:27:44 BoogieIcfgContainer [2020-09-21 12:27:44,415 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:27:44,425 INFO L168 Benchmark]: Toolchain (without parser) took 16732.69 ms. Allocated memory was 146.8 MB in the beginning and 352.8 MB in the end (delta: 206.0 MB). Free memory was 100.5 MB in the beginning and 174.4 MB in the end (delta: -73.9 MB). Peak memory consumption was 132.1 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:44,426 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 12:27:44,427 INFO L168 Benchmark]: CACSL2BoogieTranslator took 759.29 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 99.9 MB in the beginning and 169.7 MB in the end (delta: -69.8 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:44,428 INFO L168 Benchmark]: Boogie Preprocessor took 74.43 ms. Allocated memory is still 204.5 MB. Free memory was 169.7 MB in the beginning and 166.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:44,430 INFO L168 Benchmark]: RCFGBuilder took 726.06 ms. Allocated memory is still 204.5 MB. Free memory was 166.4 MB in the beginning and 120.7 MB in the end (delta: 45.6 MB). Peak memory consumption was 45.6 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:44,433 INFO L168 Benchmark]: TraceAbstraction took 15164.54 ms. Allocated memory was 204.5 MB in the beginning and 352.8 MB in the end (delta: 148.4 MB). Free memory was 120.1 MB in the beginning and 174.4 MB in the end (delta: -54.4 MB). Peak memory consumption was 94.0 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:44,444 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 759.29 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 99.9 MB in the beginning and 169.7 MB in the end (delta: -69.8 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 74.43 ms. Allocated memory is still 204.5 MB. Free memory was 169.7 MB in the beginning and 166.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 726.06 ms. Allocated memory is still 204.5 MB. Free memory was 166.4 MB in the beginning and 120.7 MB in the end (delta: 45.6 MB). Peak memory consumption was 45.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15164.54 ms. Allocated memory was 204.5 MB in the beginning and 352.8 MB in the end (delta: 148.4 MB). Free memory was 120.1 MB in the beginning and 174.4 MB in the end (delta: -54.4 MB). Peak memory consumption was 94.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 605]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L588] const int len = 5; [L589] CALL, EXPR dll_create(len) [L568] DLL head = ((void *)0); [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND FALSE !(\read(head)) [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND FALSE !(len > 0) [L585] return head; [L589] RET, EXPR dll_create(len) [L589] DLL head = dll_create(len); [L590] head->next [L590] COND TRUE head->next [L591] EXPR head->data_0 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] EXPR head->data_1 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] EXPR head->data_2 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L605] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 15.0s, OverallIterations: 9, TraceHistogramMax: 5, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 276 SDtfs, 375 SDslu, 1099 SDs, 0 SdLazy, 1020 SolverSat, 75 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 127 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 65 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 11.2s InterpolantComputationTime, 327 NumberOfCodeBlocks, 327 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 264 ConstructedInterpolants, 0 QuantifiedInterpolants, 34522 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 69/156 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...