/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/splice-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 19:46:00,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:46:00,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:46:00,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:46:00,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:46:00,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:46:00,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:46:00,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:46:00,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:46:00,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:46:00,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:46:00,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:46:00,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:46:00,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:46:00,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:46:00,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:46:00,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:46:00,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:46:00,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:46:00,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:46:00,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:46:00,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:46:00,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:46:00,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:46:00,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 19:46:00,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 19:46:00,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 19:46:00,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 19:46:00,766 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 19:46:00,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 19:46:00,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 19:46:00,768 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 19:46:00,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 19:46:00,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 19:46:00,770 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 19:46:00,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 19:46:00,771 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 19:46:00,771 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 19:46:00,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:46:00,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:46:00,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:46:00,778 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 [2020-08-21 19:46:00,798 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:46:00,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:46:00,800 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:46:00,800 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:46:00,800 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:46:00,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:46:00,801 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:46:00,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:46:00,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:46:00,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:46:00,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:46:00,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:46:00,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:46:00,802 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:46:00,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:46:00,803 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:46:00,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:46:00,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:46:00,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:46:00,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:46:00,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:46:00,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:46:00,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:46:00,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:46:00,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:46:00,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:46:00,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:46:00,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:46:00,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:46:00,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-08-21 19:46:01,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:46:01,105 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:46:01,108 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:46:01,110 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:46:01,110 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:46:01,111 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/splice-1.i [2020-08-21 19:46:01,174 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c1f1662f/551c0f4662ff41bb8d236f2a4b820b70/FLAG4edd6b6a8 [2020-08-21 19:46:01,720 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:46:01,720 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/splice-1.i [2020-08-21 19:46:01,733 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c1f1662f/551c0f4662ff41bb8d236f2a4b820b70/FLAG4edd6b6a8 [2020-08-21 19:46:02,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c1f1662f/551c0f4662ff41bb8d236f2a4b820b70 [2020-08-21 19:46:02,011 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:46:02,013 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:46:02,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:46:02,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:46:02,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:46:02,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:46:02" (1/1) ... [2020-08-21 19:46:02,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e065585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:46:02, skipping insertion in model container [2020-08-21 19:46:02,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:46:02" (1/1) ... [2020-08-21 19:46:02,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:46:02,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:46:02,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:46:02,523 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:46:02,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:46:02,628 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:46:02,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:46:02 WrapperNode [2020-08-21 19:46:02,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:46:02,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:46:02,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:46:02,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:46:02,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:46:02" (1/1) ... [2020-08-21 19:46:02,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:46:02" (1/1) ... [2020-08-21 19:46:02,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:46:02" (1/1) ... [2020-08-21 19:46:02,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:46:02" (1/1) ... [2020-08-21 19:46:02,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:46:02" (1/1) ... [2020-08-21 19:46:02,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:46:02" (1/1) ... [2020-08-21 19:46:02,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:46:02" (1/1) ... [2020-08-21 19:46:02,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:46:02,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:46:02,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:46:02,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:46:02,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:46:02" (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 [2020-08-21 19:46:02,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:46:02,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:46:02,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-21 19:46:02,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-21 19:46:02,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-08-21 19:46:02,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-08-21 19:46:02,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-08-21 19:46:02,764 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-21 19:46:02,764 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:46:02,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:46:02,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 19:46:02,766 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-21 19:46:02,766 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-21 19:46:02,766 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-21 19:46:02,766 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-21 19:46:02,767 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-21 19:46:02,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-21 19:46:02,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-21 19:46:02,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-21 19:46:02,767 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-21 19:46:02,768 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-21 19:46:02,768 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-21 19:46:02,768 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-21 19:46:02,769 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-21 19:46:02,770 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-21 19:46:02,770 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-21 19:46:02,770 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-21 19:46:02,771 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-21 19:46:02,771 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-21 19:46:02,771 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-08-21 19:46:02,771 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-08-21 19:46:02,771 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-08-21 19:46:02,771 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-21 19:46:02,771 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-21 19:46:02,772 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-21 19:46:02,772 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-21 19:46:02,772 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-21 19:46:02,772 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-21 19:46:02,772 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-21 19:46:02,772 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-21 19:46:02,772 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-21 19:46:02,773 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-21 19:46:02,774 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-21 19:46:02,775 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-21 19:46:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-21 19:46:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-21 19:46:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-21 19:46:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-21 19:46:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-21 19:46:02,777 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-21 19:46:02,777 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-21 19:46:02,777 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-21 19:46:02,777 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-21 19:46:02,777 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-21 19:46:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-21 19:46:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-21 19:46:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-21 19:46:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-21 19:46:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-21 19:46:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-21 19:46:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-21 19:46:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-21 19:46:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-21 19:46:02,780 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-21 19:46:02,780 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-21 19:46:02,780 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-21 19:46:02,780 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 19:46:02,781 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 19:46:02,781 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 19:46:02,782 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 19:46:02,782 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-21 19:46:02,782 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 19:46:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-21 19:46:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-21 19:46:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 19:46:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-21 19:46:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-21 19:46:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-21 19:46:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 19:46:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-21 19:46:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-21 19:46:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-21 19:46:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-21 19:46:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-21 19:46:02,786 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-21 19:46:02,786 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-21 19:46:02,786 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-21 19:46:02,786 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-21 19:46:02,786 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-21 19:46:02,786 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-21 19:46:02,786 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-21 19:46:02,786 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-21 19:46:02,787 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-21 19:46:02,787 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-21 19:46:02,787 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-21 19:46:02,787 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-21 19:46:02,787 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-21 19:46:02,787 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-21 19:46:02,787 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-21 19:46:02,787 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-21 19:46:02,787 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-21 19:46:02,787 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-21 19:46:02,788 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-21 19:46:02,788 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-21 19:46:02,788 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-21 19:46:02,788 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-21 19:46:02,788 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-21 19:46:02,788 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-21 19:46:02,788 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-21 19:46:02,788 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-21 19:46:02,788 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-21 19:46:02,788 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-21 19:46:02,789 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-21 19:46:02,789 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-21 19:46:02,789 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-21 19:46:02,789 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-21 19:46:02,789 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-21 19:46:02,789 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-21 19:46:02,789 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-21 19:46:02,789 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:46:02,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 19:46:02,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 19:46:02,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 19:46:02,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 19:46:02,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 19:46:02,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:46:02,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:46:02,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 19:46:03,119 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-21 19:46:03,311 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:46:03,312 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-21 19:46:03,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:46:03 BoogieIcfgContainer [2020-08-21 19:46:03,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:46:03,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:46:03,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:46:03,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:46:03,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:46:02" (1/3) ... [2020-08-21 19:46:03,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12277014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:46:03, skipping insertion in model container [2020-08-21 19:46:03,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:46:02" (2/3) ... [2020-08-21 19:46:03,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12277014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:46:03, skipping insertion in model container [2020-08-21 19:46:03,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:46:03" (3/3) ... [2020-08-21 19:46:03,324 INFO L109 eAbstractionObserver]: Analyzing ICFG splice-1.i [2020-08-21 19:46:03,337 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:46:03,344 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:46:03,357 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:46:03,377 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:46:03,377 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:46:03,377 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:46:03,378 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:46:03,378 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:46:03,378 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:46:03,378 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:46:03,378 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:46:03,394 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-08-21 19:46:03,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 19:46:03,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:46:03,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:46:03,402 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:46:03,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:46:03,407 INFO L82 PathProgramCache]: Analyzing trace with hash 661731879, now seen corresponding path program 1 times [2020-08-21 19:46:03,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:46:03,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763723524] [2020-08-21 19:46:03,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:46:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:46:03,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:46:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:46:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:46:03,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763723524] [2020-08-21 19:46:03,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:46:03,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:46:03,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392231444] [2020-08-21 19:46:03,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:46:03,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:46:03,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:46:03,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:46:03,630 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-08-21 19:46:03,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:46:03,754 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2020-08-21 19:46:03,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:46:03,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 19:46:03,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:46:03,781 INFO L225 Difference]: With dead ends: 54 [2020-08-21 19:46:03,781 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 19:46:03,785 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 [2020-08-21 19:46:03,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 19:46:03,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 19:46:03,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 19:46:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-08-21 19:46:03,825 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 16 [2020-08-21 19:46:03,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:46:03,826 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-08-21 19:46:03,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:46:03,826 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-08-21 19:46:03,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 19:46:03,827 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:46:03,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:46:03,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:46:03,828 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:46:03,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:46:03,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1973627133, now seen corresponding path program 1 times [2020-08-21 19:46:03,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:46:03,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969720399] [2020-08-21 19:46:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:46:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:46:03,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:46:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:46:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:46:03,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969720399] [2020-08-21 19:46:03,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:46:03,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:46:03,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207625277] [2020-08-21 19:46:03,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:46:03,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:46:03,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:46:03,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:46:03,937 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 5 states. [2020-08-21 19:46:04,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:46:04,039 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-08-21 19:46:04,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 19:46:04,039 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-21 19:46:04,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:46:04,041 INFO L225 Difference]: With dead ends: 44 [2020-08-21 19:46:04,041 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 19:46:04,042 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 [2020-08-21 19:46:04,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 19:46:04,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-08-21 19:46:04,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 19:46:04,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-08-21 19:46:04,050 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 18 [2020-08-21 19:46:04,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:46:04,051 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-08-21 19:46:04,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:46:04,051 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-08-21 19:46:04,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 19:46:04,052 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:46:04,052 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] [2020-08-21 19:46:04,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:46:04,053 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:46:04,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:46:04,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1721544590, now seen corresponding path program 1 times [2020-08-21 19:46:04,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:46:04,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231534376] [2020-08-21 19:46:04,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:46:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:46:04,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:46:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:46:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:46:04,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231534376] [2020-08-21 19:46:04,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:46:04,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:46:04,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25253100] [2020-08-21 19:46:04,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:46:04,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:46:04,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:46:04,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:46:04,140 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 5 states. [2020-08-21 19:46:04,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:46:04,236 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-08-21 19:46:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 19:46:04,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-21 19:46:04,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:46:04,242 INFO L225 Difference]: With dead ends: 51 [2020-08-21 19:46:04,242 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 19:46:04,243 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 [2020-08-21 19:46:04,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 19:46:04,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-08-21 19:46:04,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-21 19:46:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-08-21 19:46:04,256 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 20 [2020-08-21 19:46:04,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:46:04,256 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-08-21 19:46:04,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:46:04,257 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-08-21 19:46:04,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 19:46:04,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:46:04,263 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] [2020-08-21 19:46:04,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:46:04,263 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:46:04,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:46:04,266 INFO L82 PathProgramCache]: Analyzing trace with hash -918584693, now seen corresponding path program 1 times [2020-08-21 19:46:04,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:46:04,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361053919] [2020-08-21 19:46:04,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:46:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:46:04,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:46:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:46:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:46:04,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361053919] [2020-08-21 19:46:04,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:46:04,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 19:46:04,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106394333] [2020-08-21 19:46:04,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 19:46:04,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:46:04,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 19:46:04,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 19:46:04,372 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 7 states. [2020-08-21 19:46:04,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:46:04,534 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2020-08-21 19:46:04,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 19:46:04,535 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-08-21 19:46:04,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:46:04,536 INFO L225 Difference]: With dead ends: 74 [2020-08-21 19:46:04,536 INFO L226 Difference]: Without dead ends: 47 [2020-08-21 19:46:04,537 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 [2020-08-21 19:46:04,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-21 19:46:04,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-08-21 19:46:04,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-21 19:46:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-08-21 19:46:04,545 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 21 [2020-08-21 19:46:04,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:46:04,545 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-08-21 19:46:04,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 19:46:04,545 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-08-21 19:46:04,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 19:46:04,546 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:46:04,547 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] [2020-08-21 19:46:04,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 19:46:04,547 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:46:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:46:04,548 INFO L82 PathProgramCache]: Analyzing trace with hash -743556192, now seen corresponding path program 1 times [2020-08-21 19:46:04,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:46:04,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281677037] [2020-08-21 19:46:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:46:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 19:46:04,587 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 19:46:04,587 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 19:46:04,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 19:46:04,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:46:04 BoogieIcfgContainer [2020-08-21 19:46:04,611 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 19:46:04,614 INFO L168 Benchmark]: Toolchain (without parser) took 2600.08 ms. Allocated memory was 147.8 MB in the beginning and 235.9 MB in the end (delta: 88.1 MB). Free memory was 102.5 MB in the beginning and 120.9 MB in the end (delta: -18.5 MB). Peak memory consumption was 69.6 MB. Max. memory is 7.1 GB. [2020-08-21 19:46:04,615 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 19:46:04,616 INFO L168 Benchmark]: CACSL2BoogieTranslator took 615.67 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 102.3 MB in the beginning and 170.2 MB in the end (delta: -68.0 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. [2020-08-21 19:46:04,616 INFO L168 Benchmark]: Boogie Preprocessor took 64.93 ms. Allocated memory is still 204.5 MB. Free memory was 170.2 MB in the beginning and 167.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2020-08-21 19:46:04,617 INFO L168 Benchmark]: RCFGBuilder took 620.76 ms. Allocated memory is still 204.5 MB. Free memory was 167.0 MB in the beginning and 120.5 MB in the end (delta: 46.5 MB). Peak memory consumption was 46.5 MB. Max. memory is 7.1 GB. [2020-08-21 19:46:04,618 INFO L168 Benchmark]: TraceAbstraction took 1293.80 ms. Allocated memory was 204.5 MB in the beginning and 235.9 MB in the end (delta: 31.5 MB). Free memory was 120.5 MB in the beginning and 120.9 MB in the end (delta: -389.6 kB). Peak memory consumption was 31.1 MB. Max. memory is 7.1 GB. [2020-08-21 19:46:04,622 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 615.67 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 102.3 MB in the beginning and 170.2 MB in the end (delta: -68.0 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 64.93 ms. Allocated memory is still 204.5 MB. Free memory was 170.2 MB in the beginning and 167.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 620.76 ms. Allocated memory is still 204.5 MB. Free memory was 167.0 MB in the beginning and 120.5 MB in the end (delta: 46.5 MB). Peak memory consumption was 46.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1293.80 ms. Allocated memory was 204.5 MB in the beginning and 235.9 MB in the end (delta: 31.5 MB). Free memory was 120.5 MB in the beginning and 120.9 MB in the end (delta: -389.6 kB). Peak memory consumption was 31.1 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: 1.2s, 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, 0.2s 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...