/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -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-d623d84 [2020-07-20 11:24:47,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:24:47,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:24:47,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:24:47,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:24:47,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:24:47,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:24:47,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:24:47,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:24:47,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:24:47,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:24:47,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:24:47,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:24:47,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:24:47,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:24:47,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:24:47,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:24:47,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:24:47,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:24:47,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:24:47,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:24:47,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:24:47,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:24:47,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:24:47,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:24:47,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:24:47,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:24:47,111 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:24:47,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:24:47,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:24:47,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:24:47,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:24:47,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:24:47,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:24:47,119 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:24:47,119 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:24:47,120 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:24:47,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:24:47,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:24:47,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:24:47,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:24:47,125 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:24:47,145 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:24:47,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:24:47,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:24:47,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:24:47,148 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:24:47,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:24:47,149 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:24:47,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:24:47,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:24:47,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:24:47,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:24:47,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:24:47,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:24:47,150 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:24:47,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:24:47,150 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:24:47,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:24:47,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:24:47,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:24:47,151 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:24:47,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:24:47,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:24:47,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:24:47,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:24:47,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:24:47,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:24:47,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:24:47,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:24:47,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:24:47,153 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:24:47,517 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:24:47,537 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:24:47,542 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:24:47,545 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:24:47,546 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:24:47,547 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-07-20 11:24:47,673 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f660ba349/57f7b47478134c4c9722e89704964d6c/FLAG2adb37a80 [2020-07-20 11:24:48,509 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:24:48,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-07-20 11:24:48,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f660ba349/57f7b47478134c4c9722e89704964d6c/FLAG2adb37a80 [2020-07-20 11:24:48,712 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f660ba349/57f7b47478134c4c9722e89704964d6c [2020-07-20 11:24:48,734 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:24:48,740 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:24:48,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:24:48,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:24:48,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:24:48,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:24:48" (1/1) ... [2020-07-20 11:24:48,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a2c0eef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:24:48, skipping insertion in model container [2020-07-20 11:24:48,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:24:48" (1/1) ... [2020-07-20 11:24:48,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:24:48,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:24:49,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:24:49,545 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:24:49,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:24:49,683 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:24:49,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:24:49 WrapperNode [2020-07-20 11:24:49,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:24:49,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:24:49,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:24:49,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:24:49,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:24:49" (1/1) ... [2020-07-20 11:24:49,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:24:49" (1/1) ... [2020-07-20 11:24:49,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:24:49" (1/1) ... [2020-07-20 11:24:49,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:24:49" (1/1) ... [2020-07-20 11:24:49,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:24:49" (1/1) ... [2020-07-20 11:24:49,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:24:49" (1/1) ... [2020-07-20 11:24:49,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:24:49" (1/1) ... [2020-07-20 11:24:49,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:24:49,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:24:49,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:24:49,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:24:49,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:24:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-20 11:24:49,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:24:49,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:24:49,952 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 11:24:49,952 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 11:24:49,953 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-07-20 11:24:49,953 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-07-20 11:24:49,953 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-07-20 11:24:49,954 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-07-20 11:24:49,955 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-07-20 11:24:49,955 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-07-20 11:24:49,956 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:24:49,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:24:49,958 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 11:24:49,958 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 11:24:49,958 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 11:24:49,959 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 11:24:49,960 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 11:24:49,960 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 11:24:49,960 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 11:24:49,960 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 11:24:49,961 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 11:24:49,961 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 11:24:49,961 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 11:24:49,961 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 11:24:49,961 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 11:24:49,963 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 11:24:49,964 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 11:24:49,964 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 11:24:49,964 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 11:24:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 11:24:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 11:24:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 11:24:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 11:24:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 11:24:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 11:24:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 11:24:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 11:24:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 11:24:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 11:24:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 11:24:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 11:24:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 11:24:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 11:24:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 11:24:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 11:24:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 11:24:49,970 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 11:24:49,971 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 11:24:49,971 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 11:24:49,971 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 11:24:49,971 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 11:24:49,972 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 11:24:49,972 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 11:24:49,972 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 11:24:49,972 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 11:24:49,972 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 11:24:49,973 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 11:24:49,973 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 11:24:49,973 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 11:24:49,973 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 11:24:49,973 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 11:24:49,974 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 11:24:49,974 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 11:24:49,975 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 11:24:49,975 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:24:49,975 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 11:24:49,975 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 11:24:49,977 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 11:24:49,977 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 11:24:49,977 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 11:24:49,977 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 11:24:49,977 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 11:24:49,978 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:24:49,978 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 11:24:49,978 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 11:24:49,979 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 11:24:49,979 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 11:24:49,979 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 11:24:49,980 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 11:24:49,980 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 11:24:49,980 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 11:24:49,980 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 11:24:49,980 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 11:24:49,980 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 11:24:49,981 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 11:24:49,981 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 11:24:49,982 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 11:24:49,982 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 11:24:49,982 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 11:24:49,982 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 11:24:49,982 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 11:24:49,982 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 11:24:49,983 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 11:24:49,983 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 11:24:49,983 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 11:24:49,983 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 11:24:49,983 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 11:24:49,983 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 11:24:49,984 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 11:24:49,984 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 11:24:49,984 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 11:24:49,984 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 11:24:49,984 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 11:24:49,985 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 11:24:49,985 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 11:24:49,985 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 11:24:49,985 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 11:24:49,985 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 11:24:49,985 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 11:24:49,985 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 11:24:49,986 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 11:24:49,986 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 11:24:49,986 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 11:24:49,986 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 11:24:49,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:24:49,986 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-07-20 11:24:49,987 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-07-20 11:24:49,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 11:24:49,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 11:24:49,987 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-07-20 11:24:49,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:24:49,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:24:49,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:24:49,988 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-07-20 11:24:49,988 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-07-20 11:24:49,988 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-07-20 11:24:49,989 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:24:49,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:24:49,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:24:49,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:24:49,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:24:51,225 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:24:51,226 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-07-20 11:24:51,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:24:51 BoogieIcfgContainer [2020-07-20 11:24:51,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:24:51,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:24:51,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:24:51,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:24:51,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:24:48" (1/3) ... [2020-07-20 11:24:51,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1294d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:24:51, skipping insertion in model container [2020-07-20 11:24:51,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:24:49" (2/3) ... [2020-07-20 11:24:51,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1294d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:24:51, skipping insertion in model container [2020-07-20 11:24:51,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:24:51" (3/3) ... [2020-07-20 11:24:51,244 INFO L109 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2020-07-20 11:24:51,260 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:24:51,274 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:24:51,292 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:24:51,332 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:24:51,332 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:24:51,333 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:24:51,333 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:24:51,333 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:24:51,333 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:24:51,333 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:24:51,334 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:24:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-07-20 11:24:51,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:24:51,373 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:24:51,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:24:51,375 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:24:51,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:24:51,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1873878464, now seen corresponding path program 1 times [2020-07-20 11:24:51,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:24:51,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536839403] [2020-07-20 11:24:51,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:24:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:24:51,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:24:51,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:24:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:24:51,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:24:51,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536839403] [2020-07-20 11:24:51,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:24:51,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:24:51,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009690649] [2020-07-20 11:24:51,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:24:51,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:24:51,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:24:51,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:24:51,704 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 2 states. [2020-07-20 11:24:51,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:24:51,842 INFO L93 Difference]: Finished difference Result 222 states and 373 transitions. [2020-07-20 11:24:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:24:51,844 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-07-20 11:24:51,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:24:51,878 INFO L225 Difference]: With dead ends: 222 [2020-07-20 11:24:51,879 INFO L226 Difference]: Without dead ends: 103 [2020-07-20 11:24:51,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:24:51,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-20 11:24:52,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-07-20 11:24:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-20 11:24:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2020-07-20 11:24:52,040 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 13 [2020-07-20 11:24:52,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:24:52,041 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2020-07-20 11:24:52,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:24:52,041 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2020-07-20 11:24:52,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:24:52,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:24:52,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:24:52,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:24:52,262 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:24:52,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:24:52,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1323314826, now seen corresponding path program 1 times [2020-07-20 11:24:52,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:24:52,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897464512] [2020-07-20 11:24:52,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:24:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:24:52,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:24:52,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:24:52,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:24:52,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:24:52,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897464512] [2020-07-20 11:24:52,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:24:52,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:24:52,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464294741] [2020-07-20 11:24:52,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:24:52,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:24:52,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:24:52,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:24:52,455 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand 3 states. [2020-07-20 11:24:52,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:24:52,553 INFO L93 Difference]: Finished difference Result 200 states and 246 transitions. [2020-07-20 11:24:52,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:24:52,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-20 11:24:52,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:24:52,558 INFO L225 Difference]: With dead ends: 200 [2020-07-20 11:24:52,559 INFO L226 Difference]: Without dead ends: 109 [2020-07-20 11:24:52,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:24:52,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-07-20 11:24:52,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2020-07-20 11:24:52,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-20 11:24:52,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-07-20 11:24:52,590 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 14 [2020-07-20 11:24:52,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:24:52,591 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-07-20 11:24:52,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:24:52,591 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-07-20 11:24:52,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:24:52,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:24:52,593 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:24:52,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:24:52,809 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:24:52,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:24:52,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1684995551, now seen corresponding path program 1 times [2020-07-20 11:24:52,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:24:52,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247038526] [2020-07-20 11:24:52,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:24:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:24:52,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 11:24:52,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:24:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:24:53,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:24:53,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247038526] [2020-07-20 11:24:53,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:24:53,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 11:24:53,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902781103] [2020-07-20 11:24:53,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 11:24:53,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:24:53,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 11:24:53,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:24:53,013 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 7 states. [2020-07-20 11:24:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:24:53,306 INFO L93 Difference]: Finished difference Result 149 states and 182 transitions. [2020-07-20 11:24:53,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:24:53,307 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-20 11:24:53,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:24:53,309 INFO L225 Difference]: With dead ends: 149 [2020-07-20 11:24:53,310 INFO L226 Difference]: Without dead ends: 144 [2020-07-20 11:24:53,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:24:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-20 11:24:53,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 108. [2020-07-20 11:24:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-20 11:24:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 131 transitions. [2020-07-20 11:24:53,331 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 131 transitions. Word has length 20 [2020-07-20 11:24:53,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:24:53,331 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 131 transitions. [2020-07-20 11:24:53,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 11:24:53,332 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 131 transitions. [2020-07-20 11:24:53,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:24:53,333 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:24:53,333 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] [2020-07-20 11:24:53,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:24:53,548 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:24:53,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:24:53,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1145945773, now seen corresponding path program 1 times [2020-07-20 11:24:53,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:24:53,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183776020] [2020-07-20 11:24:53,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:24:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:24:53,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 11:24:53,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:24:53,782 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-07-20 11:24:53,783 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:24:53,799 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:24:53,804 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-07-20 11:24:53,806 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:24:53,814 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:24:53,815 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:24:53,815 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-07-20 11:24:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:24:53,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:24:53,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183776020] [2020-07-20 11:24:53,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:24:53,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:24:53,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587956579] [2020-07-20 11:24:53,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:24:53,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:24:53,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:24:53,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:24:53,836 INFO L87 Difference]: Start difference. First operand 108 states and 131 transitions. Second operand 5 states. [2020-07-20 11:24:54,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:24:54,105 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2020-07-20 11:24:54,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:24:54,106 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-20 11:24:54,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:24:54,108 INFO L225 Difference]: With dead ends: 110 [2020-07-20 11:24:54,109 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 11:24:54,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:24:54,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 11:24:54,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-07-20 11:24:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-20 11:24:54,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2020-07-20 11:24:54,125 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 27 [2020-07-20 11:24:54,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:24:54,126 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2020-07-20 11:24:54,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:24:54,126 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2020-07-20 11:24:54,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:24:54,128 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:24:54,128 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] [2020-07-20 11:24:54,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:24:54,344 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:24:54,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:24:54,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1471361763, now seen corresponding path program 1 times [2020-07-20 11:24:54,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:24:54,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963014990] [2020-07-20 11:24:54,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:24:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:24:54,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 11:24:54,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:24:54,530 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:24:54,548 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2020-07-20 11:24:54,549 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:24:54,557 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2020-07-20 11:24:54,558 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:24:54,580 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:24:54,586 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2020-07-20 11:24:54,588 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 11:24:54,594 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2020-07-20 11:24:54,595 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 11:24:54,601 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:24:54,602 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-20 11:24:54,602 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:59, output treesize:9 [2020-07-20 11:24:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:24:54,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:24:54,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963014990] [2020-07-20 11:24:54,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:24:54,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:24:54,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84600511] [2020-07-20 11:24:54,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:24:54,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:24:54,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:24:54,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:24:54,622 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand 5 states. [2020-07-20 11:24:54,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:24:54,892 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2020-07-20 11:24:54,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:24:54,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-20 11:24:54,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:24:54,895 INFO L225 Difference]: With dead ends: 109 [2020-07-20 11:24:54,895 INFO L226 Difference]: Without dead ends: 106 [2020-07-20 11:24:54,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:24:54,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-20 11:24:54,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-07-20 11:24:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 11:24:54,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2020-07-20 11:24:54,909 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 27 [2020-07-20 11:24:54,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:24:54,910 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2020-07-20 11:24:54,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:24:54,910 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2020-07-20 11:24:54,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 11:24:54,911 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:24:54,912 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] [2020-07-20 11:24:55,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:24:55,127 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:24:55,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:24:55,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1648323131, now seen corresponding path program 1 times [2020-07-20 11:24:55,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:24:55,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963754387] [2020-07-20 11:24:55,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:24:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:24:55,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 11:24:55,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:24:55,325 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2020-07-20 11:24:55,326 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:24:55,340 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:24:55,342 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:24:55,342 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:12 [2020-07-20 11:24:55,395 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2020-07-20 11:24:55,396 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:24:55,399 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:24:55,400 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:24:55,401 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2020-07-20 11:24:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:24:55,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:24:55,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963754387] [2020-07-20 11:24:55,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:24:55,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 11:24:55,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335260361] [2020-07-20 11:24:55,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 11:24:55,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:24:55,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 11:24:55,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:24:55,419 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand 9 states. [2020-07-20 11:24:55,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:24:55,879 INFO L93 Difference]: Finished difference Result 143 states and 169 transitions. [2020-07-20 11:24:55,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:24:55,880 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-07-20 11:24:55,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:24:55,882 INFO L225 Difference]: With dead ends: 143 [2020-07-20 11:24:55,882 INFO L226 Difference]: Without dead ends: 140 [2020-07-20 11:24:55,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:24:55,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-20 11:24:55,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 112. [2020-07-20 11:24:55,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 11:24:55,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2020-07-20 11:24:55,897 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 30 [2020-07-20 11:24:55,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:24:55,897 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2020-07-20 11:24:55,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 11:24:55,898 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2020-07-20 11:24:55,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 11:24:55,899 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:24:55,899 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] [2020-07-20 11:24:56,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:24:56,110 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:24:56,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:24:56,110 INFO L82 PathProgramCache]: Analyzing trace with hash 861386650, now seen corresponding path program 1 times [2020-07-20 11:24:56,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:24:56,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488319641] [2020-07-20 11:24:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:24:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:24:56,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 11:24:56,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:24:56,268 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2020-07-20 11:24:56,269 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:24:56,281 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:24:56,288 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2020-07-20 11:24:56,289 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:24:56,301 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:24:56,302 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:24:56,303 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:32, output treesize:18 [2020-07-20 11:24:56,365 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 11:24:56,366 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:24:56,380 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:24:56,384 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 11:24:56,385 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:24:56,392 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:24:56,393 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:24:56,395 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-07-20 11:24:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:24:56,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:24:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:24:56,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488319641] [2020-07-20 11:24:56,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:24:56,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-20 11:24:56,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801584919] [2020-07-20 11:24:56,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:24:56,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:24:56,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:24:56,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:24:56,598 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand 11 states. [2020-07-20 11:24:57,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:24:57,191 INFO L93 Difference]: Finished difference Result 229 states and 274 transitions. [2020-07-20 11:24:57,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:24:57,194 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-07-20 11:24:57,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:24:57,202 INFO L225 Difference]: With dead ends: 229 [2020-07-20 11:24:57,203 INFO L226 Difference]: Without dead ends: 145 [2020-07-20 11:24:57,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:24:57,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-20 11:24:57,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 138. [2020-07-20 11:24:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-20 11:24:57,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2020-07-20 11:24:57,243 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 30 [2020-07-20 11:24:57,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:24:57,244 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2020-07-20 11:24:57,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:24:57,244 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2020-07-20 11:24:57,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 11:24:57,249 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:24:57,249 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] [2020-07-20 11:24:57,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:24:57,466 INFO L427 AbstractCegarLoop]: === Iteration 8 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:24:57,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:24:57,467 INFO L82 PathProgramCache]: Analyzing trace with hash 671486784, now seen corresponding path program 1 times [2020-07-20 11:24:57,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:24:57,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738109871] [2020-07-20 11:24:57,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:24:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:24:57,602 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:24:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:24:57,632 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:24:57,707 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:24:57,707 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:24:57,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:24:57,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:24:57 BoogieIcfgContainer [2020-07-20 11:24:57,986 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:24:57,988 INFO L168 Benchmark]: Toolchain (without parser) took 9252.45 ms. Allocated memory was 137.4 MB in the beginning and 298.3 MB in the end (delta: 161.0 MB). Free memory was 99.3 MB in the beginning and 172.1 MB in the end (delta: -72.8 MB). Peak memory consumption was 88.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:24:57,989 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 11:24:57,990 INFO L168 Benchmark]: CACSL2BoogieTranslator took 943.50 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 99.1 MB in the beginning and 167.5 MB in the end (delta: -68.5 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:24:57,991 INFO L168 Benchmark]: Boogie Preprocessor took 121.33 ms. Allocated memory is still 202.4 MB. Free memory was 167.5 MB in the beginning and 163.5 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:24:57,992 INFO L168 Benchmark]: RCFGBuilder took 1417.49 ms. Allocated memory is still 202.4 MB. Free memory was 163.5 MB in the beginning and 95.0 MB in the end (delta: 68.5 MB). Peak memory consumption was 68.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:24:57,993 INFO L168 Benchmark]: TraceAbstraction took 6751.78 ms. Allocated memory was 202.4 MB in the beginning and 298.3 MB in the end (delta: 95.9 MB). Free memory was 94.3 MB in the beginning and 172.1 MB in the end (delta: -77.8 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:24:57,997 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 943.50 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 99.1 MB in the beginning and 167.5 MB in the end (delta: -68.5 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.33 ms. Allocated memory is still 202.4 MB. Free memory was 167.5 MB in the beginning and 163.5 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1417.49 ms. Allocated memory is still 202.4 MB. Free memory was 163.5 MB in the beginning and 95.0 MB in the end (delta: 68.5 MB). Peak memory consumption was 68.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6751.78 ms. Allocated memory was 202.4 MB in the beginning and 298.3 MB in the end (delta: 95.9 MB). Free memory was 94.3 MB in the beginning and 172.1 MB in the end (delta: -77.8 MB). Peak memory consumption was 18.1 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); VAL [data={0:0}] [L628] COND TRUE __VERIFIER_nondet_int() [L629] struct node *node = malloc(sizeof *node); VAL [data={0:0}, malloc(sizeof *node)={2439:0}, node={2439:0}] [L630] COND FALSE !(!node) VAL [data={0:0}, malloc(sizeof *node)={2439:0}, node={2439:0}] [L632] node->next = node [L633] node->value = __VERIFIER_nondet_int() [L634] struct list *item = malloc(sizeof *item); VAL [data={0:0}, item={2438:0}, malloc(sizeof *item)={2438:0}, malloc(sizeof *node)={2439:0}, node={2439:0}] [L635] COND FALSE !(!item) VAL [data={0:0}, item={2438:0}, malloc(sizeof *item)={2438:0}, malloc(sizeof *node)={2439:0}, node={2439:0}] [L637] item->slist = node [L638] item->next = data [L639] data = item VAL [data={2438:0}, item={2438:0}, malloc(sizeof *item)={2438:0}, malloc(sizeof *node)={2439:0}, node={2439:0}] [L628] COND FALSE !(__VERIFIER_nondet_int()) [L641] COND FALSE !(!data) VAL [data={2438:0}, item={2438:0}, malloc(sizeof *item)={2438:0}, malloc(sizeof *node)={2439:0}, node={2439:0}] [L643] CALL inspect_before(data) VAL [shape={2438:0}] [L604] COND FALSE !(!(shape)) VAL [shape={2438:0}, shape={2438:0}] [L605] shape->next VAL [shape={2438:0}, shape={2438:0}, shape->next={0:0}] [L605] COND FALSE !(shape->next) [L611] COND FALSE !(!(shape)) VAL [shape={2438:0}, shape={2438:0}] [L612] EXPR shape->next VAL [shape={2438:0}, shape={2438:0}, shape->next={0:0}] [L612] COND FALSE !(!(shape->next == ((void *)0))) [L613] EXPR shape->slist VAL [shape={2438:0}, shape={2438:0}, shape->slist={2439:0}] [L613] COND FALSE !(!(shape->slist)) [L614] EXPR shape->slist [L614] EXPR shape->slist->next VAL [shape={2438:0}, shape={2438:0}, shape->slist={2439:0}, shape->slist->next={2439:0}] [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: 6.5s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 815 SDtfs, 335 SDslu, 2392 SDs, 0 SdLazy, 734 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 198 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred 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: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 75 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 194 NumberOfCodeBlocks, 194 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 183 ConstructedInterpolants, 0 QuantifiedInterpolants, 25561 SizeOfPredicates, 41 NumberOfNonLiveVariables, 695 ConjunctsInSsa, 98 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 8/12 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...