/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 enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 05:12:12,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 05:12:12,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 05:12:12,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 05:12:12,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 05:12:12,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 05:12:12,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 05:12:12,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 05:12:12,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 05:12:12,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 05:12:12,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 05:12:12,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 05:12:12,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 05:12:12,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 05:12:12,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 05:12:12,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 05:12:12,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 05:12:12,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 05:12:12,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 05:12:12,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 05:12:12,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 05:12:12,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 05:12:12,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 05:12:12,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 05:12:12,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 05:12:12,398 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 05:12:12,398 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 05:12:12,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 05:12:12,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 05:12:12,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 05:12:12,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 05:12:12,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 05:12:12,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 05:12:12,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 05:12:12,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 05:12:12,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 05:12:12,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 05:12:12,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 05:12:12,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 05:12:12,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 05:12:12,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 05:12:12,407 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 [2020-08-19 05:12:12,434 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 05:12:12,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 05:12:12,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 05:12:12,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 05:12:12,436 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 05:12:12,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 05:12:12,436 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 05:12:12,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 05:12:12,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 05:12:12,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 05:12:12,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 05:12:12,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 05:12:12,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 05:12:12,442 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 05:12:12,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 05:12:12,443 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 05:12:12,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 05:12:12,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 05:12:12,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 05:12:12,444 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 05:12:12,444 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 05:12:12,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:12:12,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 05:12:12,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 05:12:12,445 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 05:12:12,445 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 05:12:12,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 05:12:12,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 05:12:12,445 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 05:12:12,446 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 -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; [2020-08-19 05:12:12,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 05:12:12,792 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 05:12:12,795 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 05:12:12,796 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 05:12:12,797 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 05:12:12,798 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-08-19 05:12:12,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2aae43faa/381b2d42ceef4326b83c2e0d58afba3f/FLAGdd518e483 [2020-08-19 05:12:13,432 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 05:12:13,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-08-19 05:12:13,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2aae43faa/381b2d42ceef4326b83c2e0d58afba3f/FLAGdd518e483 [2020-08-19 05:12:13,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2aae43faa/381b2d42ceef4326b83c2e0d58afba3f [2020-08-19 05:12:13,739 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 05:12:13,742 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 05:12:13,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 05:12:13,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 05:12:13,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 05:12:13,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:12:13" (1/1) ... [2020-08-19 05:12:13,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da780e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:13, skipping insertion in model container [2020-08-19 05:12:13,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:12:13" (1/1) ... [2020-08-19 05:12:13,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 05:12:13,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 05:12:14,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:12:14,286 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 05:12:14,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:12:14,485 INFO L208 MainTranslator]: Completed translation [2020-08-19 05:12:14,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:14 WrapperNode [2020-08-19 05:12:14,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 05:12:14,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 05:12:14,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 05:12:14,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 05:12:14,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:14" (1/1) ... [2020-08-19 05:12:14,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:14" (1/1) ... [2020-08-19 05:12:14,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:14" (1/1) ... [2020-08-19 05:12:14,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:14" (1/1) ... [2020-08-19 05:12:14,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:14" (1/1) ... [2020-08-19 05:12:14,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:14" (1/1) ... [2020-08-19 05:12:14,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:14" (1/1) ... [2020-08-19 05:12:14,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 05:12:14,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 05:12:14,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 05:12:14,589 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 05:12:14,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:14" (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 [2020-08-19 05:12:14,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 05:12:14,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 05:12:14,658 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-19 05:12:14,658 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-19 05:12:14,658 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-08-19 05:12:14,658 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-08-19 05:12:14,658 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-08-19 05:12:14,659 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-08-19 05:12:14,659 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-08-19 05:12:14,659 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-08-19 05:12:14,659 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 05:12:14,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 05:12:14,659 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-19 05:12:14,660 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-19 05:12:14,660 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-19 05:12:14,660 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-19 05:12:14,660 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-19 05:12:14,660 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-19 05:12:14,660 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-19 05:12:14,661 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-19 05:12:14,661 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-19 05:12:14,661 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-19 05:12:14,661 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-19 05:12:14,661 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-19 05:12:14,661 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-19 05:12:14,661 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-19 05:12:14,662 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-19 05:12:14,662 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-19 05:12:14,662 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-19 05:12:14,662 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-19 05:12:14,662 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-19 05:12:14,662 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-19 05:12:14,663 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-19 05:12:14,663 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-19 05:12:14,663 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-19 05:12:14,663 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-19 05:12:14,663 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-19 05:12:14,663 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-19 05:12:14,664 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-19 05:12:14,664 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-19 05:12:14,664 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-19 05:12:14,664 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-19 05:12:14,664 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-19 05:12:14,664 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-19 05:12:14,664 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-19 05:12:14,665 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-19 05:12:14,665 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-19 05:12:14,665 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-19 05:12:14,665 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-19 05:12:14,665 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-19 05:12:14,665 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-19 05:12:14,665 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-19 05:12:14,666 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-19 05:12:14,666 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-19 05:12:14,666 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-19 05:12:14,666 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-19 05:12:14,666 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-19 05:12:14,666 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-19 05:12:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-19 05:12:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-19 05:12:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-19 05:12:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-19 05:12:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-19 05:12:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-19 05:12:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-19 05:12:14,668 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-19 05:12:14,668 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-19 05:12:14,668 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-19 05:12:14,668 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-19 05:12:14,668 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-19 05:12:14,668 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-19 05:12:14,668 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-19 05:12:14,669 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 05:12:14,669 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-19 05:12:14,669 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-19 05:12:14,669 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-19 05:12:14,669 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-19 05:12:14,669 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-19 05:12:14,670 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-19 05:12:14,670 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-19 05:12:14,670 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-19 05:12:14,670 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-19 05:12:14,670 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-19 05:12:14,670 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-19 05:12:14,670 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-19 05:12:14,671 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-19 05:12:14,671 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-19 05:12:14,671 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-19 05:12:14,671 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-19 05:12:14,671 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-19 05:12:14,671 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-19 05:12:14,671 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-19 05:12:14,672 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-19 05:12:14,672 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-19 05:12:14,672 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-19 05:12:14,672 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-19 05:12:14,672 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-19 05:12:14,672 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-19 05:12:14,672 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-19 05:12:14,672 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-19 05:12:14,673 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-19 05:12:14,673 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-19 05:12:14,673 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-19 05:12:14,673 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-19 05:12:14,673 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-19 05:12:14,673 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-19 05:12:14,673 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-19 05:12:14,674 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-19 05:12:14,674 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-19 05:12:14,674 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-19 05:12:14,674 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-19 05:12:14,674 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-19 05:12:14,674 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-19 05:12:14,674 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-19 05:12:14,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 05:12:14,675 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-08-19 05:12:14,675 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-08-19 05:12:14,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-19 05:12:14,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-19 05:12:14,675 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-08-19 05:12:14,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 05:12:14,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 05:12:14,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 05:12:14,676 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-08-19 05:12:14,676 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-08-19 05:12:14,676 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-08-19 05:12:14,676 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 05:12:14,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-19 05:12:14,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 05:12:14,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 05:12:14,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 05:12:15,480 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 05:12:15,480 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-08-19 05:12:15,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:12:15 BoogieIcfgContainer [2020-08-19 05:12:15,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 05:12:15,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 05:12:15,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 05:12:15,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 05:12:15,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 05:12:13" (1/3) ... [2020-08-19 05:12:15,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@536feca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:12:15, skipping insertion in model container [2020-08-19 05:12:15,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:14" (2/3) ... [2020-08-19 05:12:15,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@536feca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:12:15, skipping insertion in model container [2020-08-19 05:12:15,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:12:15" (3/3) ... [2020-08-19 05:12:15,494 INFO L109 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2020-08-19 05:12:15,504 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 05:12:15,513 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 05:12:15,549 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 05:12:15,574 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 05:12:15,574 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 05:12:15,575 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 05:12:15,575 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 05:12:15,575 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 05:12:15,575 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 05:12:15,575 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 05:12:15,576 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 05:12:15,597 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-08-19 05:12:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 05:12:15,604 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:15,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:15,605 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:15,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:15,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1873878464, now seen corresponding path program 1 times [2020-08-19 05:12:15,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:15,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988248046] [2020-08-19 05:12:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:15,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:15,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988248046] [2020-08-19 05:12:15,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:15,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:15,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638204430] [2020-08-19 05:12:15,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:15,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:15,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:15,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:15,818 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 3 states. [2020-08-19 05:12:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:16,060 INFO L93 Difference]: Finished difference Result 240 states and 408 transitions. [2020-08-19 05:12:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:16,062 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-08-19 05:12:16,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:16,079 INFO L225 Difference]: With dead ends: 240 [2020-08-19 05:12:16,079 INFO L226 Difference]: Without dead ends: 118 [2020-08-19 05:12:16,085 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 [2020-08-19 05:12:16,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-08-19 05:12:16,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2020-08-19 05:12:16,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-19 05:12:16,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2020-08-19 05:12:16,154 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 13 [2020-08-19 05:12:16,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:16,154 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2020-08-19 05:12:16,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:16,155 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2020-08-19 05:12:16,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 05:12:16,155 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:16,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:16,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 05:12:16,156 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:16,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:16,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1323314826, now seen corresponding path program 1 times [2020-08-19 05:12:16,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:16,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625996039] [2020-08-19 05:12:16,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:16,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:16,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625996039] [2020-08-19 05:12:16,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:16,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 05:12:16,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563969858] [2020-08-19 05:12:16,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 05:12:16,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:16,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 05:12:16,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 05:12:16,238 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand 4 states. [2020-08-19 05:12:16,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:16,528 INFO L93 Difference]: Finished difference Result 206 states and 255 transitions. [2020-08-19 05:12:16,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 05:12:16,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-19 05:12:16,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:16,531 INFO L225 Difference]: With dead ends: 206 [2020-08-19 05:12:16,531 INFO L226 Difference]: Without dead ends: 115 [2020-08-19 05:12:16,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 05:12:16,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-19 05:12:16,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2020-08-19 05:12:16,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-19 05:12:16,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-08-19 05:12:16,550 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 14 [2020-08-19 05:12:16,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:16,550 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-08-19 05:12:16,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 05:12:16,550 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-08-19 05:12:16,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 05:12:16,551 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:16,551 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:16,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 05:12:16,552 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:16,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:16,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1684995551, now seen corresponding path program 1 times [2020-08-19 05:12:16,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:16,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767161855] [2020-08-19 05:12:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:16,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:16,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767161855] [2020-08-19 05:12:16,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:16,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 05:12:16,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740430011] [2020-08-19 05:12:16,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 05:12:16,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:16,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 05:12:16,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 05:12:16,705 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 7 states. [2020-08-19 05:12:17,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:17,275 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2020-08-19 05:12:17,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 05:12:17,279 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-19 05:12:17,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:17,282 INFO L225 Difference]: With dead ends: 157 [2020-08-19 05:12:17,284 INFO L226 Difference]: Without dead ends: 152 [2020-08-19 05:12:17,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-19 05:12:17,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-19 05:12:17,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 108. [2020-08-19 05:12:17,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-19 05:12:17,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 131 transitions. [2020-08-19 05:12:17,315 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 131 transitions. Word has length 20 [2020-08-19 05:12:17,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:17,316 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 131 transitions. [2020-08-19 05:12:17,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 05:12:17,316 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 131 transitions. [2020-08-19 05:12:17,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 05:12:17,317 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:17,317 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, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:17,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 05:12:17,320 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:17,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:17,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1145945773, now seen corresponding path program 1 times [2020-08-19 05:12:17,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:17,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699116507] [2020-08-19 05:12:17,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:17,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 05:12:17,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699116507] [2020-08-19 05:12:17,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:17,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 05:12:17,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824866451] [2020-08-19 05:12:17,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 05:12:17,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:17,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 05:12:17,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 05:12:17,490 INFO L87 Difference]: Start difference. First operand 108 states and 131 transitions. Second operand 6 states. [2020-08-19 05:12:17,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:17,872 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2020-08-19 05:12:17,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 05:12:17,872 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-19 05:12:17,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:17,874 INFO L225 Difference]: With dead ends: 116 [2020-08-19 05:12:17,875 INFO L226 Difference]: Without dead ends: 113 [2020-08-19 05:12:17,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-19 05:12:17,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-08-19 05:12:17,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2020-08-19 05:12:17,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-19 05:12:17,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2020-08-19 05:12:17,886 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 27 [2020-08-19 05:12:17,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:17,887 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2020-08-19 05:12:17,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 05:12:17,887 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2020-08-19 05:12:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 05:12:17,888 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:17,888 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, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:17,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 05:12:17,889 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:17,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:17,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1471361763, now seen corresponding path program 1 times [2020-08-19 05:12:17,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:17,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632080339] [2020-08-19 05:12:17,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:17,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 05:12:17,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632080339] [2020-08-19 05:12:17,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:17,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 05:12:17,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709903064] [2020-08-19 05:12:17,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 05:12:17,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:17,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 05:12:17,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 05:12:17,980 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand 6 states. [2020-08-19 05:12:18,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:18,432 INFO L93 Difference]: Finished difference Result 115 states and 139 transitions. [2020-08-19 05:12:18,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 05:12:18,433 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-19 05:12:18,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:18,435 INFO L225 Difference]: With dead ends: 115 [2020-08-19 05:12:18,435 INFO L226 Difference]: Without dead ends: 112 [2020-08-19 05:12:18,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-19 05:12:18,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-19 05:12:18,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2020-08-19 05:12:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-08-19 05:12:18,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2020-08-19 05:12:18,456 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 27 [2020-08-19 05:12:18,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:18,457 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2020-08-19 05:12:18,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 05:12:18,457 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2020-08-19 05:12:18,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 05:12:18,458 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:18,458 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:18,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 05:12:18,459 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:18,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:18,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1648323131, now seen corresponding path program 1 times [2020-08-19 05:12:18,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:18,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568410454] [2020-08-19 05:12:18,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:18,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:18,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568410454] [2020-08-19 05:12:18,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:18,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 05:12:18,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456575329] [2020-08-19 05:12:18,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 05:12:18,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:18,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 05:12:18,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 05:12:18,571 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand 9 states. [2020-08-19 05:12:19,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:19,251 INFO L93 Difference]: Finished difference Result 147 states and 177 transitions. [2020-08-19 05:12:19,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 05:12:19,252 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-08-19 05:12:19,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:19,254 INFO L225 Difference]: With dead ends: 147 [2020-08-19 05:12:19,254 INFO L226 Difference]: Without dead ends: 144 [2020-08-19 05:12:19,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-08-19 05:12:19,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-08-19 05:12:19,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2020-08-19 05:12:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-19 05:12:19,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2020-08-19 05:12:19,265 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 30 [2020-08-19 05:12:19,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:19,266 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2020-08-19 05:12:19,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 05:12:19,266 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2020-08-19 05:12:19,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 05:12:19,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:19,267 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:19,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 05:12:19,268 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:19,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:19,268 INFO L82 PathProgramCache]: Analyzing trace with hash 861386650, now seen corresponding path program 1 times [2020-08-19 05:12:19,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:19,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746004791] [2020-08-19 05:12:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:19,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:19,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746004791] [2020-08-19 05:12:19,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:19,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 05:12:19,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660564868] [2020-08-19 05:12:19,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 05:12:19,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:19,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 05:12:19,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 05:12:19,366 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand 9 states. [2020-08-19 05:12:19,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:19,996 INFO L93 Difference]: Finished difference Result 146 states and 175 transitions. [2020-08-19 05:12:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 05:12:19,997 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-08-19 05:12:19,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:20,002 INFO L225 Difference]: With dead ends: 146 [2020-08-19 05:12:20,002 INFO L226 Difference]: Without dead ends: 143 [2020-08-19 05:12:20,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-08-19 05:12:20,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-08-19 05:12:20,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 118. [2020-08-19 05:12:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-08-19 05:12:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2020-08-19 05:12:20,022 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 30 [2020-08-19 05:12:20,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:20,023 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2020-08-19 05:12:20,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 05:12:20,023 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2020-08-19 05:12:20,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-19 05:12:20,026 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:20,027 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:20,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 05:12:20,027 INFO L427 AbstractCegarLoop]: === Iteration 8 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:20,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:20,028 INFO L82 PathProgramCache]: Analyzing trace with hash 671486784, now seen corresponding path program 1 times [2020-08-19 05:12:20,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:20,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067084892] [2020-08-19 05:12:20,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 05:12:20,076 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 05:12:20,077 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 05:12:20,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 05:12:20,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 05:12:20 BoogieIcfgContainer [2020-08-19 05:12:20,110 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 05:12:20,112 INFO L168 Benchmark]: Toolchain (without parser) took 6370.47 ms. Allocated memory was 145.8 MB in the beginning and 290.5 MB in the end (delta: 144.7 MB). Free memory was 99.5 MB in the beginning and 131.2 MB in the end (delta: -31.8 MB). Peak memory consumption was 113.0 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:20,119 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 05:12:20,120 INFO L168 Benchmark]: CACSL2BoogieTranslator took 745.61 ms. Allocated memory was 145.8 MB in the beginning and 201.9 MB in the end (delta: 56.1 MB). Free memory was 99.3 MB in the beginning and 163.3 MB in the end (delta: -64.0 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:20,121 INFO L168 Benchmark]: Boogie Preprocessor took 99.88 ms. Allocated memory is still 201.9 MB. Free memory was 163.3 MB in the beginning and 159.2 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:20,122 INFO L168 Benchmark]: RCFGBuilder took 896.60 ms. Allocated memory is still 201.9 MB. Free memory was 159.2 MB in the beginning and 90.8 MB in the end (delta: 68.4 MB). Peak memory consumption was 68.4 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:20,122 INFO L168 Benchmark]: TraceAbstraction took 4623.34 ms. Allocated memory was 201.9 MB in the beginning and 290.5 MB in the end (delta: 88.6 MB). Free memory was 90.2 MB in the beginning and 131.2 MB in the end (delta: -41.0 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:20,125 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 145.8 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 745.61 ms. Allocated memory was 145.8 MB in the beginning and 201.9 MB in the end (delta: 56.1 MB). Free memory was 99.3 MB in the beginning and 163.3 MB in the end (delta: -64.0 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 99.88 ms. Allocated memory is still 201.9 MB. Free memory was 163.3 MB in the beginning and 159.2 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 896.60 ms. Allocated memory is still 201.9 MB. Free memory was 159.2 MB in the beginning and 90.8 MB in the end (delta: 68.4 MB). Peak memory consumption was 68.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4623.34 ms. Allocated memory was 201.9 MB in the beginning and 290.5 MB in the end (delta: 88.6 MB). Free memory was 90.2 MB in the beginning and 131.2 MB in the end (delta: -41.0 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 554]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L627] struct list *data = ((void *)0); [L628] COND TRUE __VERIFIER_nondet_int() [L629] struct node *node = malloc(sizeof *node); [L630] COND FALSE !(!node) [L632] node->next = node [L633] node->value = __VERIFIER_nondet_int() [L634] struct list *item = malloc(sizeof *item); [L635] COND FALSE !(!item) [L637] item->slist = node [L638] item->next = data [L639] data = item [L628] COND FALSE !(__VERIFIER_nondet_int()) [L641] COND FALSE !(!data) [L643] CALL inspect_before(data) [L604] COND FALSE !(!(shape)) [L605] shape->next [L605] COND FALSE !(shape->next) [L611] COND FALSE !(!(shape)) [L612] EXPR shape->next [L612] COND FALSE !(!(shape->next == ((void *)0))) [L613] EXPR shape->slist [L613] COND FALSE !(!(shape->slist)) [L614] EXPR shape->slist [L614] EXPR shape->slist->next [L614] COND TRUE !(shape->slist->next == ((void *)0)) [L614] CALL fail() [L554] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 121 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.5s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 793 SDtfs, 949 SDslu, 966 SDs, 0 SdLazy, 2089 SolverSat, 220 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=7, 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, 7 MinimizatonAttempts, 138 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 194 NumberOfCodeBlocks, 194 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 16950 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 10/10 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...