/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:27:59,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:27:59,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:27:59,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:27:59,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:27:59,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:27:59,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:27:59,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:27:59,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:27:59,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:27:59,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:27:59,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:27:59,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:27:59,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:27:59,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:27:59,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:27:59,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:27:59,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:27:59,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:27:59,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:27:59,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:27:59,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:27:59,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:27:59,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:27:59,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 16:27:59,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 16:27:59,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 16:27:59,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 16:27:59,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 16:27:59,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 16:27:59,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 16:27:59,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 16:27:59,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 16:27:59,809 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 16:27:59,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 16:27:59,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 16:27:59,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 16:27:59,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 16:27:59,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:27:59,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:27:59,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:27:59,814 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 [2020-07-21 16:27:59,829 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:27:59,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:27:59,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:27:59,831 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:27:59,831 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:27:59,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:27:59,832 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:27:59,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:27:59,832 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:27:59,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:27:59,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:27:59,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:27:59,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:27:59,833 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:27:59,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:27:59,833 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:27:59,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:27:59,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:27:59,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:27:59,834 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:27:59,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:27:59,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:27:59,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:27:59,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:27:59,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:27:59,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:27:59,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:27:59,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:27:59,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:27:59,837 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:28:00,127 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:28:00,141 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:28:00,144 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:28:00,146 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:28:00,146 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:28:00,147 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-21 16:28:00,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb4e33dac/7afdeecafcda4321a49b907797a54b5e/FLAG22bd4b71c [2020-07-21 16:28:00,817 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:28:00,818 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-21 16:28:00,835 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb4e33dac/7afdeecafcda4321a49b907797a54b5e/FLAG22bd4b71c [2020-07-21 16:28:01,044 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb4e33dac/7afdeecafcda4321a49b907797a54b5e [2020-07-21 16:28:01,054 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:28:01,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:28:01,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:28:01,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:28:01,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:28:01,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:28:01" (1/1) ... [2020-07-21 16:28:01,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3d649a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:28:01, skipping insertion in model container [2020-07-21 16:28:01,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:28:01" (1/1) ... [2020-07-21 16:28:01,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:28:01,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:28:01,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:28:01,596 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:28:01,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:28:01,706 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:28:01,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:28:01 WrapperNode [2020-07-21 16:28:01,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:28:01,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:28:01,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:28:01,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:28:01,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:28:01" (1/1) ... [2020-07-21 16:28:01,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:28:01" (1/1) ... [2020-07-21 16:28:01,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:28:01" (1/1) ... [2020-07-21 16:28:01,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:28:01" (1/1) ... [2020-07-21 16:28:01,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:28:01" (1/1) ... [2020-07-21 16:28:01,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:28:01" (1/1) ... [2020-07-21 16:28:01,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:28:01" (1/1) ... [2020-07-21 16:28:01,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:28:01,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:28:01,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:28:01,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:28:01,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:28:01" (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 [2020-07-21 16:28:01,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:28:01,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:28:01,851 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 16:28:01,851 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 16:28:01,852 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-21 16:28:01,852 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-07-21 16:28:01,852 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:28:01,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:28:01,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:28:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 16:28:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 16:28:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 16:28:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 16:28:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 16:28:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 16:28:01,854 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 16:28:01,854 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 16:28:01,854 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 16:28:01,854 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 16:28:01,854 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 16:28:01,854 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 16:28:01,855 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 16:28:01,855 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 16:28:01,855 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 16:28:01,855 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 16:28:01,855 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 16:28:01,855 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 16:28:01,856 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 16:28:01,856 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 16:28:01,856 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 16:28:01,856 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 16:28:01,856 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 16:28:01,856 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 16:28:01,857 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 16:28:01,857 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 16:28:01,857 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 16:28:01,857 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 16:28:01,857 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 16:28:01,857 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 16:28:01,857 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 16:28:01,857 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 16:28:01,858 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 16:28:01,858 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 16:28:01,858 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 16:28:01,858 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 16:28:01,858 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 16:28:01,858 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 16:28:01,858 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 16:28:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 16:28:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 16:28:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 16:28:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 16:28:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 16:28:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 16:28:01,860 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 16:28:01,860 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 16:28:01,860 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 16:28:01,860 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 16:28:01,860 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 16:28:01,860 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 16:28:01,860 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 16:28:01,861 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 16:28:01,861 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 16:28:01,861 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 16:28:01,861 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 16:28:01,861 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 16:28:01,861 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 16:28:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 16:28:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 16:28:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 16:28:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:28:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 16:28:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 16:28:01,863 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 16:28:01,863 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 16:28:01,863 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 16:28:01,863 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 16:28:01,863 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 16:28:01,863 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 16:28:01,863 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 16:28:01,864 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 16:28:01,864 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 16:28:01,864 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 16:28:01,864 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 16:28:01,864 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 16:28:01,864 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 16:28:01,865 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 16:28:01,865 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 16:28:01,865 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 16:28:01,865 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 16:28:01,865 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 16:28:01,865 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 16:28:01,865 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 16:28:01,866 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 16:28:01,866 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 16:28:01,866 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 16:28:01,866 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 16:28:01,866 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 16:28:01,866 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 16:28:01,866 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 16:28:01,867 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 16:28:01,867 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 16:28:01,867 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 16:28:01,867 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 16:28:01,867 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 16:28:01,867 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 16:28:01,867 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 16:28:01,868 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 16:28:01,868 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 16:28:01,868 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 16:28:01,868 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 16:28:01,868 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 16:28:01,868 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 16:28:01,868 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 16:28:01,869 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-21 16:28:01,869 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-07-21 16:28:01,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 16:28:01,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:28:01,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 16:28:01,869 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:28:01,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 16:28:01,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:28:01,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:28:01,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:28:01,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:28:02,167 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-21 16:28:02,407 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:28:02,408 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 16:28:02,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:28:02 BoogieIcfgContainer [2020-07-21 16:28:02,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:28:02,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:28:02,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:28:02,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:28:02,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:28:01" (1/3) ... [2020-07-21 16:28:02,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@425f1df6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:28:02, skipping insertion in model container [2020-07-21 16:28:02,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:28:01" (2/3) ... [2020-07-21 16:28:02,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@425f1df6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:28:02, skipping insertion in model container [2020-07-21 16:28:02,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:28:02" (3/3) ... [2020-07-21 16:28:02,422 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-07-21 16:28:02,433 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:28:02,441 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:28:02,456 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:28:02,481 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:28:02,481 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:28:02,481 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:28:02,482 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:28:02,482 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:28:02,483 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:28:02,483 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:28:02,483 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:28:02,502 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-21 16:28:02,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 16:28:02,509 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:28:02,511 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] [2020-07-21 16:28:02,511 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:28:02,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:28:02,517 INFO L82 PathProgramCache]: Analyzing trace with hash 248267832, now seen corresponding path program 1 times [2020-07-21 16:28:02,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:28:02,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793699226] [2020-07-21 16:28:02,526 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 16:28:02,732 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:28:02,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:28:02,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:28:02,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:28:02,812 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:28:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:28:02,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:28:02,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793699226] [2020-07-21 16:28:02,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:28:02,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:28:02,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029428664] [2020-07-21 16:28:02,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:28:02,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:28:02,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:28:02,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:28:02,859 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-07-21 16:28:02,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:28:02,943 INFO L93 Difference]: Finished difference Result 66 states and 92 transitions. [2020-07-21 16:28:02,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:28:02,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-21 16:28:02,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:28:02,961 INFO L225 Difference]: With dead ends: 66 [2020-07-21 16:28:02,962 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 16:28:02,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:28:02,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 16:28:03,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-21 16:28:03,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 16:28:03,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-07-21 16:28:03,037 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 20 [2020-07-21 16:28:03,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:28:03,038 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-07-21 16:28:03,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:28:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-07-21 16:28:03,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 16:28:03,040 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:28:03,041 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] [2020-07-21 16:28:03,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:28:03,255 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:28:03,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:28:03,256 INFO L82 PathProgramCache]: Analyzing trace with hash 248265910, now seen corresponding path program 1 times [2020-07-21 16:28:03,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:28:03,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420664560] [2020-07-21 16:28:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 16:28:03,360 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:28:03,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:28:03,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:28:03,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:28:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:28:03,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:28:03,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420664560] [2020-07-21 16:28:03,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:28:03,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:28:03,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837862975] [2020-07-21 16:28:03,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:28:03,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:28:03,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:28:03,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:28:03,418 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 5 states. [2020-07-21 16:28:03,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:28:03,471 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2020-07-21 16:28:03,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:28:03,472 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-21 16:28:03,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:28:03,473 INFO L225 Difference]: With dead ends: 62 [2020-07-21 16:28:03,473 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 16:28:03,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:28:03,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 16:28:03,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-07-21 16:28:03,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 16:28:03,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-07-21 16:28:03,489 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 20 [2020-07-21 16:28:03,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:28:03,490 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-07-21 16:28:03,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:28:03,490 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-07-21 16:28:03,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 16:28:03,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:28:03,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:28:03,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:28:03,694 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:28:03,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:28:03,695 INFO L82 PathProgramCache]: Analyzing trace with hash 215855051, now seen corresponding path program 1 times [2020-07-21 16:28:03,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:28:03,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851635737] [2020-07-21 16:28:03,696 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 16:28:03,810 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:28:03,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:28:03,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 16:28:03,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:28:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:28:03,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:28:03,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851635737] [2020-07-21 16:28:03,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:28:03,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:28:03,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217841448] [2020-07-21 16:28:03,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:28:03,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:28:03,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:28:03,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:28:03,834 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 3 states. [2020-07-21 16:28:03,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:28:03,867 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2020-07-21 16:28:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:28:03,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 16:28:03,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:28:03,871 INFO L225 Difference]: With dead ends: 69 [2020-07-21 16:28:03,871 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 16:28:03,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:28:03,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 16:28:03,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-21 16:28:03,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 16:28:03,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-07-21 16:28:03,879 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 27 [2020-07-21 16:28:03,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:28:03,880 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-07-21 16:28:03,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:28:03,880 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-07-21 16:28:03,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 16:28:03,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:28:03,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:28:04,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:28:04,095 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:28:04,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:28:04,096 INFO L82 PathProgramCache]: Analyzing trace with hash -795262199, now seen corresponding path program 1 times [2020-07-21 16:28:04,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:28:04,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968526489] [2020-07-21 16:28:04,097 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 16:28:04,248 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:28:04,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:28:04,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 16:28:04,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:28:04,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:28:04,344 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 18 treesize of output 19 [2020-07-21 16:28:04,345 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:28:04,358 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:28:04,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:28:04,369 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 18 treesize of output 19 [2020-07-21 16:28:04,370 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:28:04,381 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:28:04,382 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:28:04,382 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:37 [2020-07-21 16:28:04,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:28:04,525 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2020-07-21 16:28:04,526 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:28:04,534 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:28:04,540 INFO L350 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2020-07-21 16:28:04,540 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2020-07-21 16:28:04,541 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:28:04,545 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:28:04,546 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:28:04,546 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:55, output treesize:7 [2020-07-21 16:28:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:28:04,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:28:04,803 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 17 [2020-07-21 16:28:04,809 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:28:04,817 INFO L624 ElimStorePlain]: treesize reduction 17, result has 15.0 percent of original size [2020-07-21 16:28:04,818 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:28:04,822 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:28:04,826 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 17 [2020-07-21 16:28:04,832 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 16:28:04,840 INFO L624 ElimStorePlain]: treesize reduction 17, result has 15.0 percent of original size [2020-07-21 16:28:04,840 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:28:04,844 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:28:04,845 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-21 16:28:04,845 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:39, output treesize:7 [2020-07-21 16:28:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:28:04,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968526489] [2020-07-21 16:28:04,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:28:04,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 16:28:04,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001568907] [2020-07-21 16:28:04,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 16:28:04,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:28:04,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 16:28:04,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-07-21 16:28:04,860 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 14 states. [2020-07-21 16:28:05,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:28:05,215 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2020-07-21 16:28:05,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:28:05,220 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-07-21 16:28:05,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:28:05,221 INFO L225 Difference]: With dead ends: 75 [2020-07-21 16:28:05,222 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 16:28:05,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:28:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 16:28:05,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-07-21 16:28:05,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-21 16:28:05,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2020-07-21 16:28:05,234 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 27 [2020-07-21 16:28:05,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:28:05,235 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2020-07-21 16:28:05,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 16:28:05,235 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2020-07-21 16:28:05,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 16:28:05,238 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:28:05,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:28:05,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:28:05,454 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:28:05,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:28:05,455 INFO L82 PathProgramCache]: Analyzing trace with hash 109910721, now seen corresponding path program 1 times [2020-07-21 16:28:05,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:28:05,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220296720] [2020-07-21 16:28:05,456 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 16:28:05,562 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:28:05,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:28:05,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:28:05,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:28:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:28:05,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:28:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:28:05,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220296720] [2020-07-21 16:28:05,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:28:05,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-21 16:28:05,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325788763] [2020-07-21 16:28:05,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 16:28:05,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:28:05,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 16:28:05,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 16:28:05,715 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 9 states. [2020-07-21 16:28:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:28:05,771 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2020-07-21 16:28:05,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:28:05,772 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-21 16:28:05,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:28:05,773 INFO L225 Difference]: With dead ends: 62 [2020-07-21 16:28:05,773 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 16:28:05,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-07-21 16:28:05,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 16:28:05,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-07-21 16:28:05,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 16:28:05,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-07-21 16:28:05,780 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 28 [2020-07-21 16:28:05,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:28:05,780 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-07-21 16:28:05,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 16:28:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-07-21 16:28:05,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 16:28:05,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:28:05,782 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:28:05,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:28:05,983 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:28:05,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:28:05,984 INFO L82 PathProgramCache]: Analyzing trace with hash 260011544, now seen corresponding path program 1 times [2020-07-21 16:28:05,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:28:05,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024266026] [2020-07-21 16:28:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 16:28:06,352 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:28:06,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:28:06,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 16:28:06,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:28:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:28:06,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:28:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:28:06,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024266026] [2020-07-21 16:28:06,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:28:06,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-21 16:28:06,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998178302] [2020-07-21 16:28:06,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 16:28:06,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:28:06,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 16:28:06,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-21 16:28:06,521 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 11 states. [2020-07-21 16:28:06,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:28:06,609 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2020-07-21 16:28:06,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 16:28:06,610 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-07-21 16:28:06,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:28:06,611 INFO L225 Difference]: With dead ends: 76 [2020-07-21 16:28:06,612 INFO L226 Difference]: Without dead ends: 56 [2020-07-21 16:28:06,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:28:06,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-21 16:28:06,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-07-21 16:28:06,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 16:28:06,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-07-21 16:28:06,624 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 34 [2020-07-21 16:28:06,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:28:06,624 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-07-21 16:28:06,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 16:28:06,625 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-07-21 16:28:06,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 16:28:06,626 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:28:06,626 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:28:06,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:28:06,842 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:28:06,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:28:06,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1408992297, now seen corresponding path program 2 times [2020-07-21 16:28:06,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:28:06,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646413682] [2020-07-21 16:28:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 16:28:08,250 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:28:08,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:28:08,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 16:28:08,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:28:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:28:08,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:28:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:28:08,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646413682] [2020-07-21 16:28:08,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:28:08,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-21 16:28:08,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551412847] [2020-07-21 16:28:08,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 16:28:08,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:28:08,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 16:28:08,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-07-21 16:28:08,473 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 13 states. [2020-07-21 16:28:08,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:28:08,544 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-07-21 16:28:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 16:28:08,546 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-07-21 16:28:08,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:28:08,547 INFO L225 Difference]: With dead ends: 83 [2020-07-21 16:28:08,547 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 16:28:08,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-07-21 16:28:08,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 16:28:08,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-21 16:28:08,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 16:28:08,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-07-21 16:28:08,554 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 41 [2020-07-21 16:28:08,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:28:08,554 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-07-21 16:28:08,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 16:28:08,555 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-07-21 16:28:08,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 16:28:08,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:28:08,556 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:28:08,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:28:08,764 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:28:08,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:28:08,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2107133704, now seen corresponding path program 3 times [2020-07-21 16:28:08,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:28:08,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895380549] [2020-07-21 16:28:08,767 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 16:28:30,014 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:28:30,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:28:30,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 16:28:30,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:28:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:28:30,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:28:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:28:30,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895380549] [2020-07-21 16:28:30,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:28:30,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 16:28:30,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594045221] [2020-07-21 16:28:30,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 16:28:30,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:28:30,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 16:28:30,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-07-21 16:28:30,275 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 14 states. [2020-07-21 16:28:30,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:28:30,361 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2020-07-21 16:28:30,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:28:30,361 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-07-21 16:28:30,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:28:30,363 INFO L225 Difference]: With dead ends: 90 [2020-07-21 16:28:30,363 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 16:28:30,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-07-21 16:28:30,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 16:28:30,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-07-21 16:28:30,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 16:28:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-07-21 16:28:30,370 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 48 [2020-07-21 16:28:30,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:28:30,370 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-07-21 16:28:30,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 16:28:30,370 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-07-21 16:28:30,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 16:28:30,373 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:28:30,373 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:28:30,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:28:30,578 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:28:30,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:28:30,579 INFO L82 PathProgramCache]: Analyzing trace with hash 893734217, now seen corresponding path program 4 times [2020-07-21 16:28:30,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:28:30,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066905621] [2020-07-21 16:28:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:29:22,557 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:29:22,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:29:22,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-21 16:29:22,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:29:22,635 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 16:29:22,636 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:29:22,640 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:29:22,640 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:29:22,640 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-21 16:29:22,673 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:29:22,673 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-21 16:29:22,674 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:29:22,685 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:29:22,686 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:29:22,686 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:11 [2020-07-21 16:29:22,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:29:22,709 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 16 treesize of output 17 [2020-07-21 16:29:22,709 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:29:22,720 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:29:22,720 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:29:22,721 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:27 [2020-07-21 16:29:22,744 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_92|], 10=[|v_#memory_int_94|]} [2020-07-21 16:29:22,750 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:29:22,770 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:29:22,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:29:22,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:29:22,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:29:22,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:29:22,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:29:22,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:29:22,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:29:22,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:29:22,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:29:22,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:29:22,786 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2020-07-21 16:29:22,787 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:29:22,820 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:29:22,821 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:29:22,822 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:27 [2020-07-21 16:29:22,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:29:22,834 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2020-07-21 16:29:22,835 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:29:22,841 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:29:22,842 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:29:22,842 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:20 [2020-07-21 16:29:22,931 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:29:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 16:29:22,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:29:22,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:29:23,157 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 16:29:23,475 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:29:23,478 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:29:23,479 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:29:23,479 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:17 [2020-07-21 16:29:23,532 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_92|], 3=[|v_#memory_int_121|]} [2020-07-21 16:29:23,536 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:29:23,547 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:29:23,549 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:29:23,553 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:29:23,554 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-21 16:29:23,554 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:57 [2020-07-21 16:29:23,630 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:29:23,647 INFO L624 ElimStorePlain]: treesize reduction 9, result has 60.9 percent of original size [2020-07-21 16:29:23,648 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:29:23,648 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:11 [2020-07-21 16:29:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-21 16:29:23,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066905621] [2020-07-21 16:29:23,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:29:23,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2020-07-21 16:29:23,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837161176] [2020-07-21 16:29:23,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 16:29:23,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:29:23,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 16:29:23,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-07-21 16:29:23,736 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 22 states. [2020-07-21 16:29:24,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:29:24,542 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2020-07-21 16:29:24,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 16:29:24,543 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2020-07-21 16:29:24,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:29:24,545 INFO L225 Difference]: With dead ends: 83 [2020-07-21 16:29:24,545 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 16:29:24,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2020-07-21 16:29:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 16:29:24,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2020-07-21 16:29:24,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 16:29:24,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2020-07-21 16:29:24,554 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 55 [2020-07-21 16:29:24,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:29:24,555 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2020-07-21 16:29:24,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 16:29:24,555 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2020-07-21 16:29:24,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 16:29:24,557 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:29:24,557 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:29:24,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:29:24,758 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:29:24,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:29:24,759 INFO L82 PathProgramCache]: Analyzing trace with hash 895583181, now seen corresponding path program 1 times [2020-07-21 16:29:24,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:29:24,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110532300] [2020-07-21 16:29:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:30:29,501 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:30:29,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:30:29,502 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:31:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:31:12,335 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:31:12,509 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:31:12,509 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:31:12,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:31:12,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:31:12 BoogieIcfgContainer [2020-07-21 16:31:12,761 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:31:12,762 INFO L168 Benchmark]: Toolchain (without parser) took 191706.90 ms. Allocated memory was 136.3 MB in the beginning and 315.1 MB in the end (delta: 178.8 MB). Free memory was 99.9 MB in the beginning and 231.9 MB in the end (delta: -132.0 MB). Peak memory consumption was 46.8 MB. Max. memory is 7.1 GB. [2020-07-21 16:31:12,763 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 16:31:12,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 649.84 ms. Allocated memory was 136.3 MB in the beginning and 201.3 MB in the end (delta: 65.0 MB). Free memory was 99.7 MB in the beginning and 168.2 MB in the end (delta: -68.5 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:31:12,764 INFO L168 Benchmark]: Boogie Preprocessor took 67.70 ms. Allocated memory is still 201.3 MB. Free memory was 168.2 MB in the beginning and 165.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-07-21 16:31:12,765 INFO L168 Benchmark]: RCFGBuilder took 630.27 ms. Allocated memory is still 201.3 MB. Free memory was 165.4 MB in the beginning and 119.1 MB in the end (delta: 46.3 MB). Peak memory consumption was 46.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:31:12,765 INFO L168 Benchmark]: TraceAbstraction took 190346.88 ms. Allocated memory was 201.3 MB in the beginning and 315.1 MB in the end (delta: 113.8 MB). Free memory was 118.4 MB in the beginning and 231.9 MB in the end (delta: -113.5 MB). Peak memory consumption was 270.4 kB. Max. memory is 7.1 GB. [2020-07-21 16:31:12,768 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 649.84 ms. Allocated memory was 136.3 MB in the beginning and 201.3 MB in the end (delta: 65.0 MB). Free memory was 99.7 MB in the beginning and 168.2 MB in the end (delta: -68.5 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 67.70 ms. Allocated memory is still 201.3 MB. Free memory was 168.2 MB in the beginning and 165.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 630.27 ms. Allocated memory is still 201.3 MB. Free memory was 165.4 MB in the beginning and 119.1 MB in the end (delta: 46.3 MB). Peak memory consumption was 46.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 190346.88 ms. Allocated memory was 201.3 MB in the beginning and 315.1 MB in the end (delta: 113.8 MB). Free memory was 118.4 MB in the beginning and 231.9 MB in the end (delta: -113.5 MB). Peak memory consumption was 270.4 kB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 605]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L588] const int len = 5; VAL [len=5] [L589] CALL, EXPR dll_create(len) VAL [\old(len)=5] [L568] DLL head = ((void *)0); VAL [\old(len)=5, head={0:0}, len=5] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=5, __VERIFIER_nondet_int() == len? 1 : 0=1, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L579] COND FALSE !(\read(head)) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=4, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=3, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-2:0}, len=3, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-4:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-4:0}, len=2, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-4:0}, len=2, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=2, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-4:0}, len=2, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-4:0}, len=2, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-4:0}, len=2, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-3:0}, len=1, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-3:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-3:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=1, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-3:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-3:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-3:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-5:0}, len=0, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L569] COND FALSE !(len > 0) VAL [\old(len)=5, head={-5:0}, len=0, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L585] return head; VAL [\old(len)=5, \result={-5:0}, head={-5:0}, len=0, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L589] RET, EXPR dll_create(len) VAL [dll_create(len)={-5:0}, len=5] [L589] DLL head = dll_create(len); [L590] head->next VAL [head={-5:0}, head->next={-3:0}, len=5] [L590] COND TRUE head->next [L591] EXPR head->data_0 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] EXPR head->data_1 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 VAL [0 != head->data_0 || 0 != head->data_1=0, head={-5:0}, head->data_0=0, head->data_1=0, len=5] [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] EXPR head->data_2 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 VAL [0 != head->data_0 || 0 != head->data_1=0, 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2=1, head={-5:0}, head->data_0=0, head->data_1=0, head->data_2=1, len=5] [L591] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L605] __VERIFIER_error() VAL [head={-5:0}, len=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 190.2s, OverallIterations: 10, TraceHistogramMax: 5, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 322 SDtfs, 493 SDslu, 1257 SDs, 0 SdLazy, 623 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 544 GetRequests, 440 SyntacticMatches, 10 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 53 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 139.5s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 355 NumberOfCodeBlocks, 329 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 518 ConstructedInterpolants, 3 QuantifiedInterpolants, 92034 SizeOfPredicates, 52 NumberOfNonLiveVariables, 1348 ConjunctsInSsa, 124 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 131/313 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...