/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-properties/list_search-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:17:27,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:17:27,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:17:27,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:17:27,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:17:27,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:17:27,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:17:27,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:17:27,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:17:27,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:17:27,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:17:27,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:17:27,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:17:27,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:17:27,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:17:27,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:17:27,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:17:27,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:17:27,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:17:27,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:17:27,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:17:27,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:17:27,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:17:27,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:17:27,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 16:17:27,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 16:17:27,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 16:17:27,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 16:17:27,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 16:17:27,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 16:17:27,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 16:17:27,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 16:17:27,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 16:17:27,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 16:17:27,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 16:17:27,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 16:17:27,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 16:17:27,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 16:17:27,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:17:27,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:17:27,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:17:27,946 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 16:17:27,984 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:17:27,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:17:27,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:17:27,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:17:27,986 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:17:27,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:17:27,986 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:17:27,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:17:27,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:17:27,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:17:27,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:17:27,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:17:27,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:17:27,991 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:17:27,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:17:27,991 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:17:27,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:17:27,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:17:27,992 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:17:27,992 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:17:27,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:17:27,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:17:27,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:17:27,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:17:27,993 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:17:27,993 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:17:27,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:17:27,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:17:27,994 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:17:27,994 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 16:17:28,274 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:17:28,286 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:17:28,290 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:17:28,291 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:17:28,292 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:17:28,293 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-21 16:17:28,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8742d90b8/678bf56e686341f1be4373c09fdb5753/FLAG06757983e [2020-07-21 16:17:28,910 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:17:28,911 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-21 16:17:28,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8742d90b8/678bf56e686341f1be4373c09fdb5753/FLAG06757983e [2020-07-21 16:17:29,149 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8742d90b8/678bf56e686341f1be4373c09fdb5753 [2020-07-21 16:17:29,158 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:17:29,162 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:17:29,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:17:29,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:17:29,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:17:29,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:17:29" (1/1) ... [2020-07-21 16:17:29,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4682a1d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:29, skipping insertion in model container [2020-07-21 16:17:29,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:17:29" (1/1) ... [2020-07-21 16:17:29,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:17:29,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:17:29,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:17:29,605 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:17:29,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:17:29,741 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:17:29,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:29 WrapperNode [2020-07-21 16:17:29,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:17:29,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:17:29,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:17:29,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:17:29,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:29" (1/1) ... [2020-07-21 16:17:29,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:29" (1/1) ... [2020-07-21 16:17:29,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:29" (1/1) ... [2020-07-21 16:17:29,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:29" (1/1) ... [2020-07-21 16:17:29,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:29" (1/1) ... [2020-07-21 16:17:29,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:29" (1/1) ... [2020-07-21 16:17:29,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:29" (1/1) ... [2020-07-21 16:17:29,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:17:29,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:17:29,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:17:29,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:17:29,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:29" (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 16:17:29,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:17:29,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:17:29,883 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:17:29,883 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 16:17:29,883 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 16:17:29,883 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-21 16:17:29,883 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-21 16:17:29,883 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-21 16:17:29,883 INFO L138 BoogieDeclarations]: Found implementation of procedure search_list [2020-07-21 16:17:29,884 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2020-07-21 16:17:29,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:17:29,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:17:29,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:17:29,884 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 16:17:29,884 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 16:17:29,885 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 16:17:29,885 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 16:17:29,885 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 16:17:29,885 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 16:17:29,885 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 16:17:29,885 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 16:17:29,886 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 16:17:29,886 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 16:17:29,886 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 16:17:29,886 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 16:17:29,886 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 16:17:29,887 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 16:17:29,887 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 16:17:29,887 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 16:17:29,887 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 16:17:29,887 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 16:17:29,887 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-21 16:17:29,887 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-21 16:17:29,888 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-21 16:17:29,888 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 16:17:29,888 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 16:17:29,888 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 16:17:29,888 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 16:17:29,888 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 16:17:29,889 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 16:17:29,889 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 16:17:29,889 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 16:17:29,889 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 16:17:29,889 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 16:17:29,889 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 16:17:29,889 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 16:17:29,890 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 16:17:29,890 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 16:17:29,890 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 16:17:29,890 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 16:17:29,890 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 16:17:29,890 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 16:17:29,891 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 16:17:29,891 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 16:17:29,891 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 16:17:29,891 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 16:17:29,891 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 16:17:29,891 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 16:17:29,892 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 16:17:29,892 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 16:17:29,892 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 16:17:29,892 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 16:17:29,892 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 16:17:29,892 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 16:17:29,892 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 16:17:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 16:17:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 16:17:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 16:17:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 16:17:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 16:17:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 16:17:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 16:17:29,894 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 16:17:29,894 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 16:17:29,894 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 16:17:29,894 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 16:17:29,894 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:17:29,894 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 16:17:29,895 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 16:17:29,895 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 16:17:29,895 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 16:17:29,895 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 16:17:29,895 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 16:17:29,895 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 16:17:29,895 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 16:17:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 16:17:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 16:17:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 16:17:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 16:17:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 16:17:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 16:17:29,896 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 16:17:29,897 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 16:17:29,897 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 16:17:29,897 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 16:17:29,897 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 16:17:29,897 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 16:17:29,897 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 16:17:29,897 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 16:17:29,898 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 16:17:29,898 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 16:17:29,898 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 16:17:29,898 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 16:17:29,898 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 16:17:29,898 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 16:17:29,898 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 16:17:29,899 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 16:17:29,899 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 16:17:29,899 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 16:17:29,899 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 16:17:29,899 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 16:17:29,899 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 16:17:29,899 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 16:17:29,900 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 16:17:29,900 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 16:17:29,900 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 16:17:29,900 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 16:17:29,900 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 16:17:29,900 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 16:17:29,900 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 16:17:29,901 INFO L130 BoogieDeclarations]: Found specification of procedure search_list [2020-07-21 16:17:29,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:17:29,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 16:17:29,901 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2020-07-21 16:17:29,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 16:17:29,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:17:29,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 16:17:29,902 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:17:29,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:17:29,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:17:29,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:17:30,481 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:17:30,482 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 16:17:30,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:17:30 BoogieIcfgContainer [2020-07-21 16:17:30,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:17:30,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:17:30,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:17:30,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:17:30,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:17:29" (1/3) ... [2020-07-21 16:17:30,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d0b584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:17:30, skipping insertion in model container [2020-07-21 16:17:30,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:29" (2/3) ... [2020-07-21 16:17:30,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d0b584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:17:30, skipping insertion in model container [2020-07-21 16:17:30,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:17:30" (3/3) ... [2020-07-21 16:17:30,495 INFO L109 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2020-07-21 16:17:30,507 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:17:30,515 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:17:30,531 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:17:30,554 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:17:30,554 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:17:30,554 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:17:30,554 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:17:30,555 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:17:30,555 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:17:30,555 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:17:30,555 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:17:30,572 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-21 16:17:30,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 16:17:30,580 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:17:30,581 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:17:30,582 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:17:30,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:17:30,589 INFO L82 PathProgramCache]: Analyzing trace with hash -125905961, now seen corresponding path program 1 times [2020-07-21 16:17:30,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:17:30,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603522181] [2020-07-21 16:17:30,601 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 16:17:30,960 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:17:30,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:17:30,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 16:17:30,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:17:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 16:17:31,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:17:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 16:17:31,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603522181] [2020-07-21 16:17:31,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:17:31,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-21 16:17:31,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683494369] [2020-07-21 16:17:31,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 16:17:31,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:17:31,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 16:17:31,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:17:31,169 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 7 states. [2020-07-21 16:17:31,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:17:31,443 INFO L93 Difference]: Finished difference Result 95 states and 133 transitions. [2020-07-21 16:17:31,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 16:17:31,445 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-07-21 16:17:31,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:17:31,455 INFO L225 Difference]: With dead ends: 95 [2020-07-21 16:17:31,456 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 16:17:31,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-07-21 16:17:31,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 16:17:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-07-21 16:17:31,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 16:17:31,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-21 16:17:31,511 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 45 [2020-07-21 16:17:31,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:17:31,511 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-21 16:17:31,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 16:17:31,512 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-21 16:17:31,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-21 16:17:31,514 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:17:31,514 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:17:31,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:17:31,728 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:17:31,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:17:31,729 INFO L82 PathProgramCache]: Analyzing trace with hash 874015054, now seen corresponding path program 1 times [2020-07-21 16:17:31,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:17:31,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953058824] [2020-07-21 16:17:31,731 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 16:17:32,231 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:17:32,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:17:32,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:17:32,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:17:32,331 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-21 16:17:32,331 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 16:17:32,332 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:32,339 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:32,340 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 16:17:32,341 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:7 [2020-07-21 16:17:32,386 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:17:32,390 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:17:32,446 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:17:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 16:17:32,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:17:32,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953058824] [2020-07-21 16:17:32,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:17:32,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 16:17:32,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011005099] [2020-07-21 16:17:32,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 16:17:32,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:17:32,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 16:17:32,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 16:17:32,509 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 9 states. [2020-07-21 16:17:32,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:17:32,787 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-07-21 16:17:32,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 16:17:32,788 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-07-21 16:17:32,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:17:32,796 INFO L225 Difference]: With dead ends: 56 [2020-07-21 16:17:32,796 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 16:17:32,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-07-21 16:17:32,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 16:17:32,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-07-21 16:17:32,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 16:17:32,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-07-21 16:17:32,816 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 47 [2020-07-21 16:17:32,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:17:32,817 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-07-21 16:17:32,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 16:17:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-07-21 16:17:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-21 16:17:32,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:17:32,821 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:17:33,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:17:33,028 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:17:33,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:17:33,029 INFO L82 PathProgramCache]: Analyzing trace with hash 480988044, now seen corresponding path program 1 times [2020-07-21 16:17:33,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:17:33,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521476846] [2020-07-21 16:17:33,031 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 16:17:33,334 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:17:33,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:17:33,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 16:17:33,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:17:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 16:17:33,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:17:33,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521476846] [2020-07-21 16:17:33,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:17:33,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 16:17:33,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611598636] [2020-07-21 16:17:33,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 16:17:33,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:17:33,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 16:17:33,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:17:33,397 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 6 states. [2020-07-21 16:17:33,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:17:33,497 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-21 16:17:33,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:17:33,498 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-07-21 16:17:33,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:17:33,500 INFO L225 Difference]: With dead ends: 54 [2020-07-21 16:17:33,500 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 16:17:33,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-21 16:17:33,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 16:17:33,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-21 16:17:33,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 16:17:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-07-21 16:17:33,517 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 47 [2020-07-21 16:17:33,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:17:33,518 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-07-21 16:17:33,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 16:17:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-07-21 16:17:33,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 16:17:33,521 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:17:33,521 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:17:33,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:17:33,737 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:17:33,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:17:33,738 INFO L82 PathProgramCache]: Analyzing trace with hash -2060209205, now seen corresponding path program 1 times [2020-07-21 16:17:33,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:17:33,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40608744] [2020-07-21 16:17:33,739 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 16:17:34,400 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:17:34,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:17:34,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 59 conjunts are in the unsatisfiable core [2020-07-21 16:17:34,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:17:34,443 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 16:17:34,443 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:34,451 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:34,451 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:17:34,452 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-21 16:17:34,492 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-21 16:17:34,492 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 16:17:34,493 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:34,502 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:34,503 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 16:17:34,505 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2020-07-21 16:17:34,622 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2020-07-21 16:17:34,623 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:34,638 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:34,644 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2020-07-21 16:17:34,644 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:34,656 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:34,658 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:17:34,658 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:54, output treesize:46 [2020-07-21 16:17:35,349 WARN L193 SmtUtils]: Spent 645.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 16:17:36,056 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 16:17:36,078 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:36,079 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 17 treesize of output 21 [2020-07-21 16:17:36,080 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:36,089 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:36,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:17:36,096 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2020-07-21 16:17:36,097 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:36,111 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:36,112 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:17:36,112 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:30 [2020-07-21 16:17:36,224 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:17:36,225 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:17:36,276 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:17:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 16:17:36,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:17:36,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:17:36,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:17:36,765 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 16:17:36,772 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:36,774 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-21 16:17:36,775 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:27 [2020-07-21 16:17:36,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40608744] [2020-07-21 16:17:36,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 16:17:36,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-21 16:17:36,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587407911] [2020-07-21 16:17:36,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 16:17:36,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:17:36,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 16:17:36,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2020-07-21 16:17:36,853 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 17 states. [2020-07-21 16:17:38,097 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:17:40,092 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 16:17:40,779 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 16:17:42,842 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 16:17:43,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:17:43,415 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-07-21 16:17:43,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 16:17:43,420 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-07-21 16:17:43,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:17:43,421 INFO L225 Difference]: With dead ends: 60 [2020-07-21 16:17:43,422 INFO L226 Difference]: Without dead ends: 51 [2020-07-21 16:17:43,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 16:17:43,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-21 16:17:43,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-07-21 16:17:43,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 16:17:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-07-21 16:17:43,431 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 50 [2020-07-21 16:17:43,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:17:43,432 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-07-21 16:17:43,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 16:17:43,432 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-07-21 16:17:43,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 16:17:43,434 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:17:43,434 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:17:43,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:17:43,642 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:17:43,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:17:43,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1841731081, now seen corresponding path program 1 times [2020-07-21 16:17:43,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:17:43,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978457254] [2020-07-21 16:17:43,645 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 16:17:44,274 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:17:44,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:17:44,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 16:17:44,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:17:44,303 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2020-07-21 16:17:44,303 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:44,305 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:44,306 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:17:44,306 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-21 16:17:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 16:17:44,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:17:44,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:17:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 16:17:44,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978457254] [2020-07-21 16:17:44,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:17:44,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2020-07-21 16:17:44,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502336488] [2020-07-21 16:17:44,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:17:44,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:17:44,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:17:44,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:17:44,688 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 18 states. [2020-07-21 16:17:45,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:17:45,314 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-07-21 16:17:45,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 16:17:45,315 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-07-21 16:17:45,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:17:45,316 INFO L225 Difference]: With dead ends: 60 [2020-07-21 16:17:45,316 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 16:17:45,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 16:17:45,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 16:17:45,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-07-21 16:17:45,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 16:17:45,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-07-21 16:17:45,331 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 50 [2020-07-21 16:17:45,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:17:45,331 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-07-21 16:17:45,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:17:45,332 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-07-21 16:17:45,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 16:17:45,336 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:17:45,337 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:17:45,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:17:45,552 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:17:45,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:17:45,553 INFO L82 PathProgramCache]: Analyzing trace with hash -65733586, now seen corresponding path program 2 times [2020-07-21 16:17:45,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:17:45,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569809265] [2020-07-21 16:17:45,554 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 16:17:46,047 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:17:46,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:17:46,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 111 conjunts are in the unsatisfiable core [2020-07-21 16:17:46,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:17:46,077 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 16:17:46,077 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:46,084 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:46,085 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:17:46,085 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-21 16:17:46,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:17:46,124 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 22 treesize of output 7 [2020-07-21 16:17:46,124 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:46,132 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:46,133 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 16:17:46,133 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2020-07-21 16:17:46,235 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2020-07-21 16:17:46,236 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:46,255 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:46,261 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2020-07-21 16:17:46,261 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:46,278 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:46,279 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:17:46,279 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:61, output treesize:53 [2020-07-21 16:17:47,005 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 16:17:47,728 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 16:17:47,755 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:47,755 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 52 [2020-07-21 16:17:47,756 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:47,801 INFO L624 ElimStorePlain]: treesize reduction 32, result has 67.7 percent of original size [2020-07-21 16:17:47,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:17:47,826 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:47,827 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 58 [2020-07-21 16:17:47,828 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:17:47,829 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:47,870 INFO L624 ElimStorePlain]: treesize reduction 24, result has 72.1 percent of original size [2020-07-21 16:17:47,871 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:17:47,871 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:68, output treesize:59 [2020-07-21 16:17:47,997 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 16:17:48,036 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:48,041 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:48,073 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:48,077 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:17:48,099 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:48,103 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:48,122 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:48,124 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-21 16:17:48,124 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:117, output treesize:63 [2020-07-21 16:17:53,906 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:17:57,296 WARN L193 SmtUtils]: Spent 3.33 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:17:57,313 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:17:57,315 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:17:57,317 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:17:57,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:17:57,349 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:57,350 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 30 [2020-07-21 16:17:57,350 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:57,376 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:57,376 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 19 [2020-07-21 16:17:57,377 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:57,452 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:57,455 INFO L440 ElimStorePlain]: Different costs {4=[|v_old(#memory_$Pointer$.base)_AFTER_CALL_26|, |v_#memory_$Pointer$.offset_BEFORE_CALL_2|], 9=[|v_old(#memory_int)_AFTER_CALL_26|]} [2020-07-21 16:17:57,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:17:57,475 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2020-07-21 16:17:57,476 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:57,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:17:57,488 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 16:17:57,504 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:57,505 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 47 [2020-07-21 16:17:57,506 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:57,669 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-07-21 16:17:57,670 INFO L624 ElimStorePlain]: treesize reduction 20, result has 89.7 percent of original size [2020-07-21 16:17:57,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:17:57,693 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2020-07-21 16:17:57,695 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:57,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:17:57,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:17:57,711 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2020-07-21 16:17:57,712 INFO L544 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:57,783 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:57,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:17:57,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:17:57,821 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:57,821 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 44 [2020-07-21 16:17:57,822 INFO L544 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:57,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:17:57,835 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2020-07-21 16:17:57,836 INFO L544 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:57,957 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-07-21 16:17:57,958 INFO L624 ElimStorePlain]: treesize reduction 24, result has 85.8 percent of original size [2020-07-21 16:17:57,960 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-21 16:17:57,961 INFO L244 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:201, output treesize:139 [2020-07-21 16:17:58,454 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:17:58,575 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 6, 1] term [2020-07-21 16:17:58,575 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:17:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 16:17:58,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:17:58,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:17:59,115 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 16:17:59,354 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-21 16:17:59,478 INFO L440 ElimStorePlain]: Different costs {1=[|v_#memory_$Pointer$.offset_92|, |v_#memory_$Pointer$.base_98|], 2=[|v_#memory_int_90|], 3=[|v_#memory_$Pointer$.offset_91|, |v_#memory_$Pointer$.base_97|]} [2020-07-21 16:17:59,487 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:59,514 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:59,522 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:59,553 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:59,557 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:17:59,580 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:59,583 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:17:59,608 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:59,611 INFO L544 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:17:59,623 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:59,625 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 5 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-07-21 16:17:59,626 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:126, output treesize:60 [2020-07-21 16:17:59,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569809265] [2020-07-21 16:17:59,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 16:17:59,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-21 16:17:59,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840835906] [2020-07-21 16:17:59,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 16:17:59,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:17:59,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 16:17:59,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=767, Unknown=1, NotChecked=0, Total=870 [2020-07-21 16:17:59,721 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 23 states. [2020-07-21 16:18:12,524 WARN L193 SmtUtils]: Spent 8.49 s on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-07-21 16:18:22,267 WARN L193 SmtUtils]: Spent 9.60 s on a formula simplification. DAG size of input: 100 DAG size of output: 56 [2020-07-21 16:18:34,491 WARN L193 SmtUtils]: Spent 8.81 s on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-07-21 16:18:36,862 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-07-21 16:18:47,967 WARN L193 SmtUtils]: Spent 10.95 s on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-07-21 16:18:49,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:18:49,061 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-07-21 16:18:49,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 16:18:49,062 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-07-21 16:18:49,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:18:49,063 INFO L225 Difference]: With dead ends: 66 [2020-07-21 16:18:49,064 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 16:18:49,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 56.7s TimeCoverageRelationStatistics Valid=269, Invalid=1797, Unknown=4, NotChecked=0, Total=2070 [2020-07-21 16:18:49,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 16:18:49,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2020-07-21 16:18:49,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 16:18:49,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-07-21 16:18:49,074 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 53 [2020-07-21 16:18:49,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:18:49,075 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-07-21 16:18:49,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 16:18:49,075 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-07-21 16:18:49,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 16:18:49,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:18:49,076 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:18:49,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:18:49,278 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:18:49,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:18:49,278 INFO L82 PathProgramCache]: Analyzing trace with hash -458760596, now seen corresponding path program 2 times [2020-07-21 16:18:49,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:18:49,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074303867] [2020-07-21 16:18:49,279 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 16:18:49,819 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:18:49,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:18:49,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 59 conjunts are in the unsatisfiable core [2020-07-21 16:18:49,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:18:49,845 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 16:18:49,846 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:18:49,849 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:18:49,850 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:18:49,850 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-21 16:18:49,863 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2020-07-21 16:18:49,864 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:18:49,869 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:18:49,869 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:18:49,870 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-07-21 16:18:49,958 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_94|], 2=[|v_#memory_$Pointer$.base_101|, |v_#memory_$Pointer$.base_103|]} [2020-07-21 16:18:49,963 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2020-07-21 16:18:49,963 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:18:49,980 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:18:49,983 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 16:18:49,995 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:18:49,996 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 16:18:50,006 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:18:50,006 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:18:50,007 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:34 [2020-07-21 16:18:50,982 WARN L193 SmtUtils]: Spent 952.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:18:51,817 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:18:51,839 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:18:51,840 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 16:18:51,841 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:18:51,856 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:18:51,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:18:51,862 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 36 [2020-07-21 16:18:51,863 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:18:51,876 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:18:51,877 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:18:51,877 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:46, output treesize:36 [2020-07-21 16:18:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 16:18:52,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:18:52,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:18:52,566 INFO L440 ElimStorePlain]: Different costs {1=[|v_#memory_$Pointer$.base_116|], 3=[|v_#memory_$Pointer$.base_115|]} [2020-07-21 16:18:52,569 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:18:52,579 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:18:52,581 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 16:18:52,588 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:18:52,589 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-21 16:18:52,589 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:28 [2020-07-21 16:18:52,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074303867] [2020-07-21 16:18:52,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 16:18:52,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-21 16:18:52,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450080636] [2020-07-21 16:18:52,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:18:52,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:18:52,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:18:52,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-07-21 16:18:52,651 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 18 states. [2020-07-21 16:18:54,388 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-07-21 16:18:59,079 WARN L193 SmtUtils]: Spent 4.63 s on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-07-21 16:19:01,151 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2020-07-21 16:19:02,930 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-07-21 16:19:07,283 WARN L193 SmtUtils]: Spent 4.32 s on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-07-21 16:19:08,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:19:08,267 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-07-21 16:19:08,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-21 16:19:08,268 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-07-21 16:19:08,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:19:08,270 INFO L225 Difference]: With dead ends: 62 [2020-07-21 16:19:08,270 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 16:19:08,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=288, Invalid=1604, Unknown=0, NotChecked=0, Total=1892 [2020-07-21 16:19:08,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 16:19:08,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-07-21 16:19:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 16:19:08,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-07-21 16:19:08,282 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 53 [2020-07-21 16:19:08,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:19:08,282 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-07-21 16:19:08,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:19:08,282 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-07-21 16:19:08,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 16:19:08,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:19:08,284 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:19:08,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:19:08,499 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:19:08,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:19:08,500 INFO L82 PathProgramCache]: Analyzing trace with hash 779859179, now seen corresponding path program 3 times [2020-07-21 16:19:08,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:19:08,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777907844] [2020-07-21 16:19:08,501 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 16:19:09,219 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:19:09,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:19:09,219 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:19:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:19:09,341 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:19:09,398 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:19:09,398 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:19:09,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:19:09,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:19:09 BoogieIcfgContainer [2020-07-21 16:19:09,677 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:19:09,678 INFO L168 Benchmark]: Toolchain (without parser) took 100519.10 ms. Allocated memory was 138.9 MB in the beginning and 335.0 MB in the end (delta: 196.1 MB). Free memory was 102.2 MB in the beginning and 247.0 MB in the end (delta: -144.8 MB). Peak memory consumption was 51.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:19:09,679 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 16:19:09,680 INFO L168 Benchmark]: CACSL2BoogieTranslator took 580.12 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 101.9 MB in the beginning and 171.1 MB in the end (delta: -69.1 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. [2020-07-21 16:19:09,680 INFO L168 Benchmark]: Boogie Preprocessor took 63.49 ms. Allocated memory is still 203.9 MB. Free memory was 171.1 MB in the beginning and 167.8 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:19:09,680 INFO L168 Benchmark]: RCFGBuilder took 679.34 ms. Allocated memory is still 203.9 MB. Free memory was 167.8 MB in the beginning and 123.1 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB. [2020-07-21 16:19:09,681 INFO L168 Benchmark]: TraceAbstraction took 99189.70 ms. Allocated memory was 203.9 MB in the beginning and 335.0 MB in the end (delta: 131.1 MB). Free memory was 122.5 MB in the beginning and 247.0 MB in the end (delta: -124.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:19:09,683 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 580.12 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 101.9 MB in the beginning and 171.1 MB in the end (delta: -69.1 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 63.49 ms. Allocated memory is still 203.9 MB. Free memory was 171.1 MB in the beginning and 167.8 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 679.34 ms. Allocated memory is still 203.9 MB. Free memory was 167.8 MB in the beginning and 123.1 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 99189.70 ms. Allocated memory was 203.9 MB in the beginning and 335.0 MB in the end (delta: 131.1 MB). Free memory was 122.5 MB in the beginning and 247.0 MB in the end (delta: -124.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L522] mlist *head; VAL [\old(head)=9, \old(head)=10, head={0:0}] [L543] int i; [L544] mlist *mylist, *temp; VAL [\old(head)=0, \old(head)=0, head={0:0}] [L545] CALL insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, k=2, l={11:12}, l={-2:0}, malloc(sizeof(mlist))={-2:0}] [L533] COND TRUE head==((void *)0) [L534] l->next = ((void *)0) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, k=2, l={-2:0}, l={11:12}, malloc(sizeof(mlist))={-2:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=0, \old(k)=2, \result=0, head={-2:0}, k=2, l={11:12}, l={-2:0}, malloc(sizeof(mlist))={-2:0}] [L545] RET insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, head={-2:0}, insert_list(mylist,2)=0, mylist={11:12}] [L546] CALL insert_list(mylist,5) VAL [\old(head)=0, \old(head)=-2, \old(k)=5, head={-2:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=-2, \old(k)=5, head={-2:0}, k=5, l={-1:0}, l={11:12}, malloc(sizeof(mlist))={-1:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=0, \old(head)=-2, \old(k)=5, head={-2:0}, k=5, l={-1:0}, l={11:12}, malloc(sizeof(mlist))={-1:0}] [L539] head = l [L540] return 0; VAL [\old(head)=-2, \old(head)=0, \old(k)=5, \result=0, head={-1:0}, k=5, l={-1:0}, l={11:12}, malloc(sizeof(mlist))={-1:0}] [L546] RET insert_list(mylist,5) VAL [\old(head)=0, \old(head)=0, head={-1:0}, insert_list(mylist,5)=0, mylist={11:12}] [L547] CALL insert_list(mylist,1) VAL [\old(head)=-1, \old(head)=0, \old(k)=1, head={-1:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=-1, \old(k)=1, head={-1:0}, k=1, l={35325:0}, l={11:12}, malloc(sizeof(mlist))={35325:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=0, \old(head)=-1, \old(k)=1, head={-1:0}, k=1, l={11:12}, l={35325:0}, malloc(sizeof(mlist))={35325:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=-1, \old(k)=1, \result=0, head={35325:0}, k=1, l={35325:0}, l={11:12}, malloc(sizeof(mlist))={35325:0}] [L547] RET insert_list(mylist,1) VAL [\old(head)=0, \old(head)=0, head={35325:0}, insert_list(mylist,1)=0, mylist={11:12}] [L548] CALL insert_list(mylist,3) VAL [\old(head)=35325, \old(head)=0, \old(k)=3, head={35325:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=35325, \old(head)=0, \old(k)=3, head={35325:0}, k=3, l={35324:0}, l={11:12}, malloc(sizeof(mlist))={35324:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=35325, \old(head)=0, \old(k)=3, head={35325:0}, k=3, l={11:12}, l={35324:0}, malloc(sizeof(mlist))={35324:0}] [L539] head = l [L540] return 0; VAL [\old(head)=35325, \old(head)=0, \old(k)=3, \result=0, head={35324:0}, k=3, l={11:12}, l={35324:0}, malloc(sizeof(mlist))={35324:0}] [L548] RET insert_list(mylist,3) VAL [\old(head)=0, \old(head)=0, head={35324:0}, insert_list(mylist,3)=0, mylist={11:12}] [L549] CALL, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={35324:0}, l={35324:0}] [L524] l = head VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={35324:0}, k=2, l={35324:0}, l={35324:0}] [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={35324:0}, k=2, l={35324:0}, l={35324:0}, l!=((void *)0) && l->key!=k=1, l->key=3] [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={35324:0}, k=2, l={35325:0}, l={35324:0}, l!=((void *)0) && l->key!=k=1, l->key=1] [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={35324:0}, k=2, l={-1:0}, l={35324:0}, l!=((void *)0) && l->key!=k=1, l->key=5] [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={35324:0}, k=2, l={35324:0}, l={-2:0}, l!=((void *)0) && l->key!=k=0, l->key=2] [L525] COND FALSE !(l!=((void *)0) && l->key!=k) [L528] return l; VAL [\old(head)=0, \old(head)=0, \old(k)=2, \result={-2:0}, head={35324:0}, k=2, l={-2:0}, l={35324:0}] [L549] RET, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, head={35324:0}, mylist={11:12}, search_list(head,2)={-2:0}] [L549] temp = search_list(head,2) [L550] EXPR temp->key VAL [\old(head)=0, \old(head)=0, head={35324:0}, mylist={11:12}, temp={-2:0}, temp->key=2] [L550] CALL __VERIFIER_assert(temp->key==1) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, head={35324:0}] [L3] COND TRUE !(cond) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={35324:0}] [L4] __VERIFIER_error() VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={35324:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 99.0s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 72.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 195 SDtfs, 416 SDslu, 643 SDs, 0 SdLazy, 1870 SolverSat, 293 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 5.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 581 GetRequests, 395 SyntacticMatches, 2 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 82.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 42 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 3.4s SatisfiabilityAnalysisTime, 19.8s InterpolantComputationTime, 401 NumberOfCodeBlocks, 379 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 431 ConstructedInterpolants, 12 QuantifiedInterpolants, 287208 SizeOfPredicates, 95 NumberOfNonLiveVariables, 2289 ConjunctsInSsa, 287 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 218/297 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...