/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/splice-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:17:20,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:17:20,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:17:20,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:17:20,485 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:17:20,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:17:20,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:17:20,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:17:20,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:17:20,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:17:20,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:17:20,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:17:20,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:17:20,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:17:20,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:17:20,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:17:20,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:17:20,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:17:20,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:17:20,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:17:20,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:17:20,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:17:20,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:17:20,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:17:20,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 16:17:20,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 16:17:20,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 16:17:20,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 16:17:20,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 16:17:20,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 16:17:20,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 16:17:20,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 16:17:20,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 16:17:20,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 16:17:20,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 16:17:20,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 16:17:20,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 16:17:20,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 16:17:20,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:17:20,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:17:20,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:17:20,533 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 16:17:20,556 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:17:20,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:17:20,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:17:20,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:17:20,558 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:17:20,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:17:20,558 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:17:20,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:17:20,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:17:20,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:17:20,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:17:20,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:17:20,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:17:20,560 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:17:20,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:17:20,560 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:17:20,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:17:20,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:17:20,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:17:20,561 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:17:20,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:17:20,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:17:20,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:17:20,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:17:20,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:17:20,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:17:20,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:17:20,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:17:20,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:17:20,563 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 [2020-08-18 16:17:20,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:17:20,910 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:17:20,913 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:17:20,914 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:17:20,914 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:17:20,915 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/splice-1.i [2020-08-18 16:17:20,989 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f1ac7c1d/6a4c514e3d0e47e4aeda82b23d2bc4d4/FLAG1436ceaf0 [2020-08-18 16:17:21,512 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:17:21,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/splice-1.i [2020-08-18 16:17:21,526 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f1ac7c1d/6a4c514e3d0e47e4aeda82b23d2bc4d4/FLAG1436ceaf0 [2020-08-18 16:17:21,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f1ac7c1d/6a4c514e3d0e47e4aeda82b23d2bc4d4 [2020-08-18 16:17:21,839 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:17:21,841 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:17:21,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:21,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:17:21,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:17:21,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:21" (1/1) ... [2020-08-18 16:17:21,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dd693c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:21, skipping insertion in model container [2020-08-18 16:17:21,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:21" (1/1) ... [2020-08-18 16:17:21,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:17:21,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:17:22,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:22,368 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:17:22,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:22,525 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:17:22,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:22 WrapperNode [2020-08-18 16:17:22,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:22,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:17:22,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:17:22,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:17:22,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:22" (1/1) ... [2020-08-18 16:17:22,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:22" (1/1) ... [2020-08-18 16:17:22,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:22" (1/1) ... [2020-08-18 16:17:22,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:22" (1/1) ... [2020-08-18 16:17:22,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:22" (1/1) ... [2020-08-18 16:17:22,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:22" (1/1) ... [2020-08-18 16:17:22,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:22" (1/1) ... [2020-08-18 16:17:22,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:17:22,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:17:22,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:17:22,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:17:22,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:17:22,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:17:22,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:17:22,672 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-18 16:17:22,672 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-18 16:17:22,673 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-08-18 16:17:22,673 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-08-18 16:17:22,673 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-08-18 16:17:22,673 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-18 16:17:22,673 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:17:22,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:17:22,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:17:22,674 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 16:17:22,674 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 16:17:22,674 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 16:17:22,674 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 16:17:22,674 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 16:17:22,681 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 16:17:22,681 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 16:17:22,681 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 16:17:22,681 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 16:17:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 16:17:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 16:17:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 16:17:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 16:17:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 16:17:22,683 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 16:17:22,683 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 16:17:22,683 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-18 16:17:22,683 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-18 16:17:22,683 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-08-18 16:17:22,683 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-08-18 16:17:22,683 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-08-18 16:17:22,684 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 16:17:22,684 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 16:17:22,684 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 16:17:22,684 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 16:17:22,684 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 16:17:22,685 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 16:17:22,685 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 16:17:22,685 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 16:17:22,685 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 16:17:22,685 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 16:17:22,685 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 16:17:22,685 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 16:17:22,686 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 16:17:22,686 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 16:17:22,686 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 16:17:22,686 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 16:17:22,686 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 16:17:22,686 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 16:17:22,686 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 16:17:22,687 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 16:17:22,687 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 16:17:22,687 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 16:17:22,687 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 16:17:22,687 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 16:17:22,687 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 16:17:22,687 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 16:17:22,688 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 16:17:22,688 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 16:17:22,688 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 16:17:22,688 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 16:17:22,688 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 16:17:22,688 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 16:17:22,689 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 16:17:22,689 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 16:17:22,689 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 16:17:22,690 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 16:17:22,690 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 16:17:22,690 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 16:17:22,690 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 16:17:22,690 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 16:17:22,692 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 16:17:22,692 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 16:17:22,692 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 16:17:22,692 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 16:17:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 16:17:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 16:17:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 16:17:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 16:17:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 16:17:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 16:17:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 16:17:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 16:17:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 16:17:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 16:17:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 16:17:22,696 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 16:17:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 16:17:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 16:17:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 16:17:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 16:17:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 16:17:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 16:17:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 16:17:22,698 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 16:17:22,698 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 16:17:22,698 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 16:17:22,698 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 16:17:22,698 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 16:17:22,698 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 16:17:22,698 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 16:17:22,699 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 16:17:22,699 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 16:17:22,699 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 16:17:22,699 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 16:17:22,699 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 16:17:22,699 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 16:17:22,699 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 16:17:22,700 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 16:17:22,700 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 16:17:22,700 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 16:17:22,700 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 16:17:22,700 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 16:17:22,700 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 16:17:22,701 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 16:17:22,701 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 16:17:22,702 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 16:17:22,703 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-18 16:17:22,703 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:17:22,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 16:17:22,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:17:22,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 16:17:22,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 16:17:22,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:17:22,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:17:22,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:17:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:17:23,031 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-18 16:17:23,237 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:17:23,237 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 16:17:23,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:23 BoogieIcfgContainer [2020-08-18 16:17:23,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:17:23,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:17:23,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:17:23,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:17:23,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:17:21" (1/3) ... [2020-08-18 16:17:23,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36375b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:23, skipping insertion in model container [2020-08-18 16:17:23,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:22" (2/3) ... [2020-08-18 16:17:23,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36375b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:23, skipping insertion in model container [2020-08-18 16:17:23,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:23" (3/3) ... [2020-08-18 16:17:23,249 INFO L109 eAbstractionObserver]: Analyzing ICFG splice-1.i [2020-08-18 16:17:23,260 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:17:23,267 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:17:23,278 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:17:23,303 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:17:23,303 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:17:23,303 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:17:23,304 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:17:23,304 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:17:23,304 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:17:23,304 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:17:23,304 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:17:23,322 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-08-18 16:17:23,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 16:17:23,328 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:23,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:23,329 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:23,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:23,334 INFO L82 PathProgramCache]: Analyzing trace with hash 661731879, now seen corresponding path program 1 times [2020-08-18 16:17:23,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:23,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413090945] [2020-08-18 16:17:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:23,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:23,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413090945] [2020-08-18 16:17:23,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:23,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:23,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134210330] [2020-08-18 16:17:23,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:23,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:23,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:23,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:23,563 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-08-18 16:17:23,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:23,695 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2020-08-18 16:17:23,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:23,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 16:17:23,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:23,706 INFO L225 Difference]: With dead ends: 54 [2020-08-18 16:17:23,707 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 16:17:23,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:23,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 16:17:23,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-18 16:17:23,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 16:17:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-08-18 16:17:23,756 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 16 [2020-08-18 16:17:23,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:23,756 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-08-18 16:17:23,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:23,757 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-08-18 16:17:23,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 16:17:23,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:23,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:23,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:17:23,759 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:23,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:23,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1973627133, now seen corresponding path program 1 times [2020-08-18 16:17:23,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:23,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378449960] [2020-08-18 16:17:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:23,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:23,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378449960] [2020-08-18 16:17:23,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:23,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:17:23,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201517386] [2020-08-18 16:17:23,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:17:23,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:23,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:17:23,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:17:23,913 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 5 states. [2020-08-18 16:17:24,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:24,007 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-08-18 16:17:24,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 16:17:24,008 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-18 16:17:24,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:24,009 INFO L225 Difference]: With dead ends: 44 [2020-08-18 16:17:24,009 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 16:17:24,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:17:24,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 16:17:24,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-08-18 16:17:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 16:17:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-08-18 16:17:24,018 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 18 [2020-08-18 16:17:24,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:24,019 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-08-18 16:17:24,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:17:24,019 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-08-18 16:17:24,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 16:17:24,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:24,020 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] [2020-08-18 16:17:24,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:17:24,020 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:24,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:24,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1721544590, now seen corresponding path program 1 times [2020-08-18 16:17:24,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:24,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467448939] [2020-08-18 16:17:24,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:24,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:24,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467448939] [2020-08-18 16:17:24,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:24,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:17:24,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154503109] [2020-08-18 16:17:24,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:17:24,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:24,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:17:24,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:17:24,163 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 5 states. [2020-08-18 16:17:24,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:24,287 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-08-18 16:17:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 16:17:24,288 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 16:17:24,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:24,291 INFO L225 Difference]: With dead ends: 51 [2020-08-18 16:17:24,292 INFO L226 Difference]: Without dead ends: 43 [2020-08-18 16:17:24,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:17:24,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-18 16:17:24,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-08-18 16:17:24,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-18 16:17:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-08-18 16:17:24,308 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 20 [2020-08-18 16:17:24,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:24,308 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-08-18 16:17:24,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:17:24,309 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-08-18 16:17:24,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 16:17:24,310 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:24,310 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:24,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:17:24,310 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:24,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:24,311 INFO L82 PathProgramCache]: Analyzing trace with hash -918584693, now seen corresponding path program 1 times [2020-08-18 16:17:24,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:24,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580207285] [2020-08-18 16:17:24,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:24,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:24,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:24,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580207285] [2020-08-18 16:17:24,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:24,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 16:17:24,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800846614] [2020-08-18 16:17:24,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 16:17:24,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:24,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 16:17:24,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 16:17:24,402 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 7 states. [2020-08-18 16:17:24,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:24,557 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2020-08-18 16:17:24,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 16:17:24,558 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-08-18 16:17:24,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:24,559 INFO L225 Difference]: With dead ends: 74 [2020-08-18 16:17:24,559 INFO L226 Difference]: Without dead ends: 47 [2020-08-18 16:17:24,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-18 16:17:24,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-18 16:17:24,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-08-18 16:17:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 16:17:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-08-18 16:17:24,569 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 21 [2020-08-18 16:17:24,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:24,569 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-08-18 16:17:24,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 16:17:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-08-18 16:17:24,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 16:17:24,570 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:24,571 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:24,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:17:24,571 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:24,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:24,572 INFO L82 PathProgramCache]: Analyzing trace with hash -743556192, now seen corresponding path program 1 times [2020-08-18 16:17:24,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:24,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390370527] [2020-08-18 16:17:24,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:17:24,607 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:17:24,608 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:17:24,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 16:17:24,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:17:24 BoogieIcfgContainer [2020-08-18 16:17:24,636 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:17:24,639 INFO L168 Benchmark]: Toolchain (without parser) took 2797.44 ms. Allocated memory was 135.8 MB in the beginning and 224.9 MB in the end (delta: 89.1 MB). Free memory was 97.7 MB in the beginning and 116.3 MB in the end (delta: -18.5 MB). Peak memory consumption was 70.6 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:24,641 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 135.8 MB. Free memory was 117.3 MB in the beginning and 116.9 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-18 16:17:24,642 INFO L168 Benchmark]: CACSL2BoogieTranslator took 684.16 ms. Allocated memory was 135.8 MB in the beginning and 198.2 MB in the end (delta: 62.4 MB). Free memory was 97.3 MB in the beginning and 163.4 MB in the end (delta: -66.1 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:24,644 INFO L168 Benchmark]: Boogie Preprocessor took 77.54 ms. Allocated memory is still 198.2 MB. Free memory was 163.4 MB in the beginning and 160.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:24,649 INFO L168 Benchmark]: RCFGBuilder took 637.07 ms. Allocated memory is still 198.2 MB. Free memory was 160.2 MB in the beginning and 114.0 MB in the end (delta: 46.3 MB). Peak memory consumption was 46.3 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:24,650 INFO L168 Benchmark]: TraceAbstraction took 1394.02 ms. Allocated memory was 198.2 MB in the beginning and 224.9 MB in the end (delta: 26.7 MB). Free memory was 112.9 MB in the beginning and 116.3 MB in the end (delta: -3.4 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:24,662 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 135.8 MB. Free memory was 117.3 MB in the beginning and 116.9 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 684.16 ms. Allocated memory was 135.8 MB in the beginning and 198.2 MB in the end (delta: 62.4 MB). Free memory was 97.3 MB in the beginning and 163.4 MB in the end (delta: -66.1 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 77.54 ms. Allocated memory is still 198.2 MB. Free memory was 163.4 MB in the beginning and 160.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 637.07 ms. Allocated memory is still 198.2 MB. Free memory was 160.2 MB in the beginning and 114.0 MB in the end (delta: 46.3 MB). Peak memory consumption was 46.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1394.02 ms. Allocated memory was 198.2 MB in the beginning and 224.9 MB in the end (delta: 26.7 MB). Free memory was 112.9 MB in the beginning and 116.3 MB in the end (delta: -3.4 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 573]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = 1; [L522] List a = (List) malloc(sizeof(struct node)); [L523] COND FALSE !(a == 0) [L524] List t; [L525] List l1; [L526] List l2; [L527] List b; [L528] List u; [L529] List p = a; [L530] COND TRUE __VERIFIER_nondet_int() [L531] COND TRUE \read(flag) [L532] p->h = 1 [L533] flag = 0 [L538] t = (List) malloc(sizeof(struct node)) [L539] COND FALSE !(t == 0) [L540] p->n = t [L541] EXPR p->n [L541] p = p->n [L530] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 3 [L544] EXPR a->h [L544] COND FALSE !(a->h == 3) [L545] flag = 1 [L546] l1 = 0 [L547] l2 = 0 [L548] p = a [L549] EXPR p->h [L549] COND TRUE p->h != 3 [L550] t = p [L551] EXPR p->n [L551] p = p->n [L552] COND TRUE \read(flag) [L553] t->n = l1 [L554] l1 = t [L555] flag = 0 [L549] EXPR p->h [L549] COND FALSE !(p->h != 3) [L562] p = l1 [L563] COND TRUE p != 0 [L564] EXPR p->h [L564] COND TRUE p->h != 2 [L573] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 52 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 124 SDtfs, 28 SDslu, 164 SDs, 0 SdLazy, 245 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 71 ConstructedInterpolants, 0 QuantifiedInterpolants, 3646 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 2/2 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...