/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 4 -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 [2020-07-20 17:12:57,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:12:57,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:12:57,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:12:57,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:12:57,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:12:57,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:12:57,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:12:57,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:12:58,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:12:58,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:12:58,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:12:58,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:12:58,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:12:58,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:12:58,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:12:58,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:12:58,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:12:58,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:12:58,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:12:58,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:12:58,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:12:58,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:12:58,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:12:58,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 17:12:58,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 17:12:58,029 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 17:12:58,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 17:12:58,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 17:12:58,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 17:12:58,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 17:12:58,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 17:12:58,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 17:12:58,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 17:12:58,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 17:12:58,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 17:12:58,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 17:12:58,041 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 17:12:58,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:12:58,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:12:58,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:12:58,046 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 17:12:58,066 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:12:58,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:12:58,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:12:58,070 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:12:58,070 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:12:58,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:12:58,070 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:12:58,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:12:58,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:12:58,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:12:58,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:12:58,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:12:58,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:12:58,072 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:12:58,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:12:58,072 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:12:58,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:12:58,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:12:58,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:12:58,073 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:12:58,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:12:58,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:12:58,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:12:58,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:12:58,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:12:58,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:12:58,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:58,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:12:58,075 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:12:58,076 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 -> 4 [2020-07-20 17:12:58,497 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:12:58,519 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:12:58,526 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:12:58,529 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:12:58,530 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:12:58,531 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-20 17:12:58,645 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/037054b59/6dc425062fb844c987f1d26dae202d21/FLAG0d4819839 [2020-07-20 17:12:59,541 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:12:59,543 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-20 17:12:59,567 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/037054b59/6dc425062fb844c987f1d26dae202d21/FLAG0d4819839 [2020-07-20 17:12:59,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/037054b59/6dc425062fb844c987f1d26dae202d21 [2020-07-20 17:12:59,741 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:12:59,746 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:12:59,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:12:59,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:12:59,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:12:59,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:12:59" (1/1) ... [2020-07-20 17:12:59,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cca3b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:59, skipping insertion in model container [2020-07-20 17:12:59,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:12:59" (1/1) ... [2020-07-20 17:12:59,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:12:59,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:13:00,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:13:00,642 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:13:00,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:13:00,765 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:13:00,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:00 WrapperNode [2020-07-20 17:13:00,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:13:00,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:13:00,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:13:00,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:13:00,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:00" (1/1) ... [2020-07-20 17:13:00,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:00" (1/1) ... [2020-07-20 17:13:00,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:00" (1/1) ... [2020-07-20 17:13:00,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:00" (1/1) ... [2020-07-20 17:13:00,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:00" (1/1) ... [2020-07-20 17:13:00,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:00" (1/1) ... [2020-07-20 17:13:00,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:00" (1/1) ... [2020-07-20 17:13:00,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:13:00,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:13:00,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:13:00,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:13:00,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:13:00,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:13:00,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:13:00,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:13:00,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 17:13:00,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 17:13:00,976 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-20 17:13:00,976 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-20 17:13:00,977 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-20 17:13:00,977 INFO L138 BoogieDeclarations]: Found implementation of procedure search_list [2020-07-20 17:13:00,977 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2020-07-20 17:13:00,977 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:13:00,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:13:00,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:13:00,978 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 17:13:00,978 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 17:13:00,978 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 17:13:00,978 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 17:13:00,979 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 17:13:00,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 17:13:00,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 17:13:00,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 17:13:00,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 17:13:00,980 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 17:13:00,980 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 17:13:00,980 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 17:13:00,980 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 17:13:00,980 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 17:13:00,981 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 17:13:00,981 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 17:13:00,981 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 17:13:00,981 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 17:13:00,981 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-20 17:13:00,982 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-20 17:13:00,982 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-20 17:13:00,982 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 17:13:00,982 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 17:13:00,983 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 17:13:00,983 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 17:13:00,983 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 17:13:00,983 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 17:13:00,983 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 17:13:00,984 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 17:13:00,984 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 17:13:00,984 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 17:13:00,984 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 17:13:00,984 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 17:13:00,985 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 17:13:00,985 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 17:13:00,985 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 17:13:00,985 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 17:13:00,985 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 17:13:00,986 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 17:13:00,986 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 17:13:00,986 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 17:13:00,986 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 17:13:00,986 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 17:13:00,986 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 17:13:00,987 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 17:13:00,987 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 17:13:00,987 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 17:13:00,987 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 17:13:00,987 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 17:13:00,987 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 17:13:00,988 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 17:13:00,988 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 17:13:00,988 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 17:13:00,988 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 17:13:00,988 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 17:13:00,989 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:13:00,989 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 17:13:00,989 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 17:13:00,989 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 17:13:00,989 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 17:13:00,990 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 17:13:00,990 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 17:13:00,990 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 17:13:00,990 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:13:00,990 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 17:13:00,990 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 17:13:00,991 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 17:13:00,991 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 17:13:00,991 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 17:13:00,991 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 17:13:00,991 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 17:13:00,991 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 17:13:00,992 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 17:13:00,992 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 17:13:00,992 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 17:13:00,992 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 17:13:00,993 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 17:13:00,993 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 17:13:00,993 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 17:13:00,993 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 17:13:00,993 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 17:13:00,993 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 17:13:00,994 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 17:13:00,994 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 17:13:00,994 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 17:13:00,994 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 17:13:00,994 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 17:13:00,994 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 17:13:00,995 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 17:13:00,995 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 17:13:00,995 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 17:13:00,995 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 17:13:00,995 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 17:13:00,995 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 17:13:00,995 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 17:13:00,996 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 17:13:00,996 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 17:13:00,996 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 17:13:00,996 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 17:13:00,996 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 17:13:00,996 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 17:13:00,996 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 17:13:00,997 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 17:13:00,997 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 17:13:00,997 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 17:13:00,997 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 17:13:00,997 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 17:13:00,997 INFO L130 BoogieDeclarations]: Found specification of procedure search_list [2020-07-20 17:13:00,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:13:00,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 17:13:00,998 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2020-07-20 17:13:00,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:13:00,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:13:00,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 17:13:00,999 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:13:00,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:13:00,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:13:00,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:13:01,795 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:13:01,796 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 17:13:01,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:13:01 BoogieIcfgContainer [2020-07-20 17:13:01,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:13:01,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:13:01,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:13:01,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:13:01,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:12:59" (1/3) ... [2020-07-20 17:13:01,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5f2c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:13:01, skipping insertion in model container [2020-07-20 17:13:01,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:13:00" (2/3) ... [2020-07-20 17:13:01,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5f2c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:13:01, skipping insertion in model container [2020-07-20 17:13:01,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:13:01" (3/3) ... [2020-07-20 17:13:01,822 INFO L109 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2020-07-20 17:13:01,841 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:13:01,855 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:13:01,880 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:13:01,918 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:13:01,919 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:13:01,919 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:13:01,919 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:13:01,919 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:13:01,920 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:13:01,920 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:13:01,920 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:13:01,951 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-20 17:13:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 17:13:01,964 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:13:01,966 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] [2020-07-20 17:13:01,967 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:13:01,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:13:01,978 INFO L82 PathProgramCache]: Analyzing trace with hash -125905961, now seen corresponding path program 1 times [2020-07-20 17:13:01,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:13:01,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836258546] [2020-07-20 17:13:01,993 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 17:13:02,740 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:13:02,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:13:02,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 17:13:02,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:13:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 17:13:02,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:13:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 17:13:03,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836258546] [2020-07-20 17:13:03,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:13:03,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-20 17:13:03,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398681353] [2020-07-20 17:13:03,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:13:03,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:13:03,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:13:03,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:13:03,261 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 7 states. [2020-07-20 17:13:03,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:13:03,880 INFO L93 Difference]: Finished difference Result 95 states and 133 transitions. [2020-07-20 17:13:03,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 17:13:03,882 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-07-20 17:13:03,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:13:03,901 INFO L225 Difference]: With dead ends: 95 [2020-07-20 17:13:03,901 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 17:13:03,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-07-20 17:13:03,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 17:13:03,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-07-20 17:13:03,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 17:13:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-20 17:13:03,988 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 45 [2020-07-20 17:13:03,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:13:03,990 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-20 17:13:03,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:13:03,990 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-20 17:13:03,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-20 17:13:03,994 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:13:03,995 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] [2020-07-20 17:13:04,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:13:04,212 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:13:04,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:13:04,213 INFO L82 PathProgramCache]: Analyzing trace with hash 874015054, now seen corresponding path program 1 times [2020-07-20 17:13:04,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:13:04,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252296848] [2020-07-20 17:13:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 17:13:06,317 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:13:06,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:13:06,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 17:13:06,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:13:06,457 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-20 17:13:06,458 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 [2020-07-20 17:13:06,459 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:06,468 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:06,471 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:13:06,472 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:7 [2020-07-20 17:13:06,546 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:13:06,554 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:13:06,632 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:13:06,698 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 17:13:06,701 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:06,704 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:06,705 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:13:06,706 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:1 [2020-07-20 17:13:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 17:13:06,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:13:06,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252296848] [2020-07-20 17:13:06,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:13:06,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-20 17:13:06,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629736892] [2020-07-20 17:13:06,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 17:13:06,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:13:06,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 17:13:06,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 17:13:06,722 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 10 states. [2020-07-20 17:13:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:13:07,153 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-07-20 17:13:07,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 17:13:07,154 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-07-20 17:13:07,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:13:07,160 INFO L225 Difference]: With dead ends: 56 [2020-07-20 17:13:07,161 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 17:13:07,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-07-20 17:13:07,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 17:13:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-07-20 17:13:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 17:13:07,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-07-20 17:13:07,177 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 47 [2020-07-20 17:13:07,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:13:07,178 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-07-20 17:13:07,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 17:13:07,178 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-07-20 17:13:07,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-20 17:13:07,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:13:07,181 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] [2020-07-20 17:13:07,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:13:07,397 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:13:07,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:13:07,398 INFO L82 PathProgramCache]: Analyzing trace with hash 480988044, now seen corresponding path program 1 times [2020-07-20 17:13:07,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:13:07,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273465237] [2020-07-20 17:13:07,400 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 17:13:08,624 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:13:08,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:13:08,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 17:13:08,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:13:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 17:13:08,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:13:08,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273465237] [2020-07-20 17:13:08,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:13:08,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 17:13:08,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129384009] [2020-07-20 17:13:08,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:13:08,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:13:08,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:13:08,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:13:08,753 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 6 states. [2020-07-20 17:13:08,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:13:08,944 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-20 17:13:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:13:08,945 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-07-20 17:13:08,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:13:08,947 INFO L225 Difference]: With dead ends: 54 [2020-07-20 17:13:08,947 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 17:13:08,948 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 [2020-07-20 17:13:08,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 17:13:08,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-20 17:13:08,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 17:13:08,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-07-20 17:13:08,958 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 47 [2020-07-20 17:13:08,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:13:08,959 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-07-20 17:13:08,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:13:08,959 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-07-20 17:13:08,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 17:13:08,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:13:08,961 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] [2020-07-20 17:13:09,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:13:09,170 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:13:09,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:13:09,171 INFO L82 PathProgramCache]: Analyzing trace with hash -2060209205, now seen corresponding path program 1 times [2020-07-20 17:13:09,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:13:09,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019456473] [2020-07-20 17:13:09,172 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 17:13:10,396 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:13:10,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:13:10,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 62 conjunts are in the unsatisfiable core [2020-07-20 17:13:10,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:13:10,434 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 [2020-07-20 17:13:10,435 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:10,442 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:10,443 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:13:10,444 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-20 17:13:10,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:13:10,483 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 [2020-07-20 17:13:10,487 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:10,510 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:10,513 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:13:10,514 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2020-07-20 17:13:10,664 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 [2020-07-20 17:13:10,665 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:10,684 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:10,692 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 [2020-07-20 17:13:10,693 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:10,708 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:10,710 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. [2020-07-20 17:13:10,711 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:49 [2020-07-20 17:13:11,442 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 17:13:12,193 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 17:13:12,235 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:12,236 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 [2020-07-20 17:13:12,238 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:13:12,241 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:12,259 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:12,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:13:12,274 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 24 [2020-07-20 17:13:12,277 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:12,291 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:12,293 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. [2020-07-20 17:13:12,294 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:36 [2020-07-20 17:13:12,499 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:13:12,502 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:13:12,609 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:13:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 17:13:12,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:13:13,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:13:13,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:13:13,413 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 17:13:13,510 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:13:13,523 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:13,526 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-20 17:13:13,527 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:24 [2020-07-20 17:13:13,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019456473] [2020-07-20 17:13:13,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 17:13:13,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-20 17:13:13,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301159981] [2020-07-20 17:13:13,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 17:13:13,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:13:13,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 17:13:13,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-07-20 17:13:13,622 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 15 states. [2020-07-20 17:13:15,167 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 17:13:17,387 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 17:13:19,819 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 48 [2020-07-20 17:13:20,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:13:20,574 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-07-20 17:13:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 17:13:20,579 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-07-20 17:13:20,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:13:20,581 INFO L225 Difference]: With dead ends: 60 [2020-07-20 17:13:20,585 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 17:13:20,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2020-07-20 17:13:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 17:13:20,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-07-20 17:13:20,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 17:13:20,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-07-20 17:13:20,624 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 50 [2020-07-20 17:13:20,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:13:20,625 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-07-20 17:13:20,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 17:13:20,629 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-07-20 17:13:20,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 17:13:20,630 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:13:20,631 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] [2020-07-20 17:13:20,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:13:20,836 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:13:20,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:13:20,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1841731081, now seen corresponding path program 1 times [2020-07-20 17:13:20,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:13:20,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604481023] [2020-07-20 17:13:20,839 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 17:13:22,405 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:13:22,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:13:22,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 17:13:22,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:13:22,454 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 [2020-07-20 17:13:22,455 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:22,461 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:22,461 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:13:22,462 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-20 17:13:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 17:13:22,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:13:22,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:13:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 17:13:22,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604481023] [2020-07-20 17:13:22,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:13:22,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2020-07-20 17:13:22,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385545690] [2020-07-20 17:13:22,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 17:13:22,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:13:22,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 17:13:22,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-07-20 17:13:22,915 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 18 states. [2020-07-20 17:13:23,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:13:23,800 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-07-20 17:13:23,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 17:13:23,802 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-07-20 17:13:23,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:13:23,804 INFO L225 Difference]: With dead ends: 60 [2020-07-20 17:13:23,805 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 17:13:23,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 17:13:23,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 17:13:23,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-07-20 17:13:23,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 17:13:23,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-07-20 17:13:23,819 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 50 [2020-07-20 17:13:23,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:13:23,819 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-07-20 17:13:23,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 17:13:23,820 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-07-20 17:13:23,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 17:13:23,822 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:13:23,822 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] [2020-07-20 17:13:24,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:13:24,032 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:13:24,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:13:24,033 INFO L82 PathProgramCache]: Analyzing trace with hash -65733586, now seen corresponding path program 2 times [2020-07-20 17:13:24,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:13:24,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850373977] [2020-07-20 17:13:24,035 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 17:13:25,832 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:13:25,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:13:25,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 110 conjunts are in the unsatisfiable core [2020-07-20 17:13:25,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:13:25,868 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 [2020-07-20 17:13:25,873 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:25,883 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:25,884 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:13:25,885 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-20 17:13:25,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:13:25,912 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 [2020-07-20 17:13:25,912 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:25,924 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:25,926 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:13:25,928 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2020-07-20 17:13:26,061 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 [2020-07-20 17:13:26,063 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:26,086 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:26,097 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 [2020-07-20 17:13:26,098 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:26,117 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:26,119 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. [2020-07-20 17:13:26,120 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:55 [2020-07-20 17:13:27,204 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 17:13:28,429 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 17:13:28,484 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:28,485 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 69 [2020-07-20 17:13:28,487 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:13:28,488 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:28,537 INFO L624 ElimStorePlain]: treesize reduction 32, result has 69.8 percent of original size [2020-07-20 17:13:28,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:13:28,551 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 24 [2020-07-20 17:13:28,552 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:28,570 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:28,573 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. [2020-07-20 17:13:28,573 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:52 [2020-07-20 17:13:28,753 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:28,802 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:28,808 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:13:28,848 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:28,854 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:13:28,881 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:28,886 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:28,906 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:28,909 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. [2020-07-20 17:13:28,910 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:117, output treesize:63 [2020-07-20 17:13:41,038 WARN L193 SmtUtils]: Spent 6.02 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 17:13:48,977 WARN L193 SmtUtils]: Spent 5.86 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 17:13:49,036 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:49,037 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 [2020-07-20 17:13:49,039 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 17:13:49,040 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:13:49,042 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:49,093 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:49,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:13:49,112 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2020-07-20 17:13:49,113 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:49,144 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:49,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:13:49,156 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 44 treesize of output 39 [2020-07-20 17:13:49,158 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:49,214 INFO L624 ElimStorePlain]: treesize reduction 4, result has 95.1 percent of original size [2020-07-20 17:13:49,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:13:49,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:13:49,226 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 [2020-07-20 17:13:49,227 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:49,264 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:49,268 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 1 xjuncts. [2020-07-20 17:13:49,269 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:103, output treesize:77 [2020-07-20 17:13:49,649 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:13:49,651 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:13:49,877 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:13:50,169 INFO L440 ElimStorePlain]: Different costs {2=[|#memory_int|], 5=[|#memory_$Pointer$.base|, |#memory_$Pointer$.offset|]} [2020-07-20 17:13:50,176 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 17:13:50,178 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 17:13:50,181 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2020-07-20 17:13:50,182 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:50,185 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:50,185 INFO L512 ElimStorePlain]: Eliminatee |#memory_$Pointer$.base| vanished before elimination [2020-07-20 17:13:50,186 INFO L512 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2020-07-20 17:13:50,186 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:13:50,187 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:117, output treesize:1 [2020-07-20 17:13:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 17:13:50,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:13:50,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:13:50,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:13:51,127 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 17:13:51,255 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 17:13:51,481 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-20 17:13:51,653 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 17:13:51,680 INFO L440 ElimStorePlain]: Different costs {1=[|v_#memory_$Pointer$.base_100|, |v_#memory_$Pointer$.offset_93|], 2=[|v_#memory_int_92|], 3=[|v_#memory_$Pointer$.offset_94|, |v_#memory_$Pointer$.base_99|]} [2020-07-20 17:13:51,686 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:51,732 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:51,738 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:13:51,770 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:51,774 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:13:51,800 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:51,810 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:13:51,851 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:51,856 INFO L544 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:13:51,873 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:13:51,876 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. [2020-07-20 17:13:51,877 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:124, output treesize:58 [2020-07-20 17:13:52,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850373977] [2020-07-20 17:13:52,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 17:13:52,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-20 17:13:52,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549468999] [2020-07-20 17:13:52,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 17:13:52,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:13:52,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 17:13:52,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=719, Unknown=4, NotChecked=0, Total=812 [2020-07-20 17:13:52,038 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 22 states. [2020-07-20 17:14:08,087 WARN L193 SmtUtils]: Spent 11.65 s on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-07-20 17:14:20,642 WARN L193 SmtUtils]: Spent 12.23 s on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2020-07-20 17:14:32,431 WARN L193 SmtUtils]: Spent 11.61 s on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-07-20 17:14:38,569 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-07-20 17:14:50,199 WARN L193 SmtUtils]: Spent 11.46 s on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-07-20 17:14:54,557 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-07-20 17:14:58,099 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-07-20 17:14:58,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:58,368 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-07-20 17:14:58,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 17:14:58,369 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-07-20 17:14:58,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:58,372 INFO L225 Difference]: With dead ends: 65 [2020-07-20 17:14:58,372 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 17:14:58,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 78.8s TimeCoverageRelationStatistics Valid=236, Invalid=1737, Unknown=7, NotChecked=0, Total=1980 [2020-07-20 17:14:58,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 17:14:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2020-07-20 17:14:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 17:14:58,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-07-20 17:14:58,388 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 53 [2020-07-20 17:14:58,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:58,389 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-07-20 17:14:58,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 17:14:58,389 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-07-20 17:14:58,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 17:14:58,390 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:58,390 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] [2020-07-20 17:14:58,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:58,607 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:58,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:58,608 INFO L82 PathProgramCache]: Analyzing trace with hash -458760596, now seen corresponding path program 2 times [2020-07-20 17:14:58,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:58,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009086559] [2020-07-20 17:14:58,609 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 17:15:00,557 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:15:00,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:15:00,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 61 conjunts are in the unsatisfiable core [2020-07-20 17:15:00,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:15:00,616 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 13 treesize of output 9 [2020-07-20 17:15:00,617 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:15:00,636 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:15:00,637 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:15:00,637 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-07-20 17:15:00,736 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_96|], 2=[|v_#memory_$Pointer$.base_105|, |v_#memory_$Pointer$.base_103|]} [2020-07-20 17:15:00,742 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 [2020-07-20 17:15:00,743 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:15:00,759 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:15:00,766 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:15:00,778 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:15:00,781 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:15:00,791 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:15:00,792 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:15:00,793 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:60, output treesize:29 [2020-07-20 17:15:02,066 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 17:15:03,689 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 17:15:03,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:15:03,711 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 17:15:03,723 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:15:03,724 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 1 case distinctions, treesize of input 25 treesize of output 44 [2020-07-20 17:15:03,725 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:15:03,726 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:15:03,763 INFO L624 ElimStorePlain]: treesize reduction 16, result has 71.9 percent of original size [2020-07-20 17:15:03,764 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:15:03,765 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:37 [2020-07-20 17:15:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 23 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 17:15:04,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:15:04,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:15:04,503 INFO L440 ElimStorePlain]: Different costs {1=[|v_#memory_$Pointer$.base_117|], 3=[|v_#memory_$Pointer$.base_118|]} [2020-07-20 17:15:04,505 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:15:04,512 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:15:04,515 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:15:04,518 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:15:04,519 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. [2020-07-20 17:15:04,520 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:51, output treesize:21 [2020-07-20 17:15:06,523 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_14 Int) (v_~head~0.base_92 Int)) (not (= 0 (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_92 (store (store (select |c_#memory_$Pointer$.base| v_~head~0.base_92) 0 v_DerPreprocessor_14) 4 c_~head~0.base)) c_~head~0.base) (+ c_~head~0.offset 4))))) is different from false [2020-07-20 17:15:06,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009086559] [2020-07-20 17:15:06,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 17:15:06,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-20 17:15:06,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922270730] [2020-07-20 17:15:06,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 17:15:06,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:15:06,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 17:15:06,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=480, Unknown=1, NotChecked=44, Total=600 [2020-07-20 17:15:06,529 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 18 states. [2020-07-20 17:15:09,232 WARN L193 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-07-20 17:15:15,322 WARN L193 SmtUtils]: Spent 6.02 s on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-07-20 17:15:18,438 WARN L193 SmtUtils]: Spent 3.07 s on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-07-20 17:15:21,155 WARN L193 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-07-20 17:15:27,540 WARN L193 SmtUtils]: Spent 6.35 s on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-07-20 17:15:31,724 WARN L193 SmtUtils]: Spent 3.99 s on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-07-20 17:15:44,753 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-07-20 17:16:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:16:31,793 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-07-20 17:16:31,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 17:16:31,794 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-07-20 17:16:31,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:16:31,796 INFO L225 Difference]: With dead ends: 65 [2020-07-20 17:16:31,797 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 17:16:31,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 44.6s TimeCoverageRelationStatistics Valid=271, Invalid=1532, Unknown=7, NotChecked=82, Total=1892 [2020-07-20 17:16:31,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 17:16:31,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-07-20 17:16:31,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 17:16:31,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-07-20 17:16:31,808 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 53 [2020-07-20 17:16:31,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:16:31,809 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-07-20 17:16:31,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 17:16:31,809 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-07-20 17:16:31,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 17:16:31,810 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:16:31,810 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] [2020-07-20 17:16:32,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:16:32,017 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:16:32,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:16:32,018 INFO L82 PathProgramCache]: Analyzing trace with hash 779859179, now seen corresponding path program 3 times [2020-07-20 17:16:32,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:16:32,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137402752] [2020-07-20 17:16:32,019 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 17:16:33,061 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:16:33,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:16:33,062 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:16:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:16:33,228 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:16:33,302 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:16:33,303 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:16:33,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:16:33,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:16:33 BoogieIcfgContainer [2020-07-20 17:16:33,613 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:16:33,614 INFO L168 Benchmark]: Toolchain (without parser) took 213871.32 ms. Allocated memory was 137.4 MB in the beginning and 347.1 MB in the end (delta: 209.7 MB). Free memory was 100.8 MB in the beginning and 117.1 MB in the end (delta: -16.3 MB). Peak memory consumption was 193.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:16:33,615 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 17:16:33,616 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1019.95 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 100.4 MB in the beginning and 168.9 MB in the end (delta: -68.6 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. [2020-07-20 17:16:33,616 INFO L168 Benchmark]: Boogie Preprocessor took 97.49 ms. Allocated memory is still 202.4 MB. Free memory was 168.9 MB in the beginning and 166.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:16:33,617 INFO L168 Benchmark]: RCFGBuilder took 938.49 ms. Allocated memory is still 202.4 MB. Free memory was 166.2 MB in the beginning and 121.5 MB in the end (delta: 44.7 MB). Peak memory consumption was 44.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:16:33,618 INFO L168 Benchmark]: TraceAbstraction took 211806.02 ms. Allocated memory was 202.4 MB in the beginning and 347.1 MB in the end (delta: 144.7 MB). Free memory was 120.8 MB in the beginning and 117.1 MB in the end (delta: 3.7 MB). Peak memory consumption was 148.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:16:33,621 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1019.95 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 100.4 MB in the beginning and 168.9 MB in the end (delta: -68.6 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 97.49 ms. Allocated memory is still 202.4 MB. Free memory was 168.9 MB in the beginning and 166.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 938.49 ms. Allocated memory is still 202.4 MB. Free memory was 166.2 MB in the beginning and 121.5 MB in the end (delta: 44.7 MB). Peak memory consumption was 44.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 211806.02 ms. Allocated memory was 202.4 MB in the beginning and 347.1 MB in the end (delta: 144.7 MB). Free memory was 120.8 MB in the beginning and 117.1 MB in the end (delta: 3.7 MB). Peak memory consumption was 148.4 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)=10, \old(head)=6, 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={28255:0}, l={11:12}, malloc(sizeof(mlist))={28255:0}] [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={28255:0}, l={11:12}, malloc(sizeof(mlist))={28255:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=0, \old(k)=2, \result=0, head={28255:0}, k=2, l={11:12}, l={28255:0}, malloc(sizeof(mlist))={28255:0}] [L545] RET insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, head={28255:0}, insert_list(mylist,2)=0, mylist={11:12}] [L546] CALL insert_list(mylist,5) VAL [\old(head)=0, \old(head)=28255, \old(k)=5, head={28255:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=28255, \old(k)=5, head={28255:0}, k=5, l={-3:0}, l={11:12}, malloc(sizeof(mlist))={-3:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=0, \old(head)=28255, \old(k)=5, head={28255:0}, k=5, l={11:12}, l={-3:0}, malloc(sizeof(mlist))={-3:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=28255, \old(k)=5, \result=0, head={-3:0}, k=5, l={-3:0}, l={11:12}, malloc(sizeof(mlist))={-3:0}] [L546] RET insert_list(mylist,5) VAL [\old(head)=0, \old(head)=0, head={-3:0}, insert_list(mylist,5)=0, mylist={11:12}] [L547] CALL insert_list(mylist,1) VAL [\old(head)=0, \old(head)=-3, \old(k)=1, head={-3:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=-3, \old(k)=1, head={-3:0}, k=1, l={11:12}, l={-1:0}, malloc(sizeof(mlist))={-1:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=-3, \old(head)=0, \old(k)=1, head={-3:0}, k=1, l={-1:0}, l={11:12}, malloc(sizeof(mlist))={-1:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=-3, \old(k)=1, \result=0, head={-1:0}, k=1, l={-1:0}, l={11:12}, malloc(sizeof(mlist))={-1:0}] [L547] RET insert_list(mylist,1) VAL [\old(head)=0, \old(head)=0, head={-1:0}, insert_list(mylist,1)=0, mylist={11:12}] [L548] CALL insert_list(mylist,3) VAL [\old(head)=-1, \old(head)=0, \old(k)=3, 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)=3, head={-1:0}, k=3, l={-2:0}, l={11:12}, malloc(sizeof(mlist))={-2:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=-1, \old(head)=0, \old(k)=3, head={-1:0}, k=3, l={-2:0}, l={11:12}, malloc(sizeof(mlist))={-2:0}] [L539] head = l [L540] return 0; VAL [\old(head)=-1, \old(head)=0, \old(k)=3, \result=0, head={-2:0}, k=3, l={11:12}, l={-2:0}, malloc(sizeof(mlist))={-2:0}] [L548] RET insert_list(mylist,3) VAL [\old(head)=0, \old(head)=0, head={-2:0}, 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={-2:0}, l={-2:0}] [L524] l = head VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-2:0}, k=2, l={-2:0}, l={-2:0}] [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={-2:0}, k=2, l={-2:0}, l={-2:0}, 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={-2:0}, k=2, l={-2:0}, l={-1:0}, 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={-2:0}, k=2, l={-3:0}, l={-2:0}, 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={-2:0}, k=2, l={28255:0}, 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={28255:0}, head={-2:0}, k=2, l={28255:0}, l={-2:0}] [L549] RET, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, head={-2:0}, mylist={11:12}, search_list(head,2)={28255:0}] [L549] temp = search_list(head,2) [L550] EXPR temp->key VAL [\old(head)=0, \old(head)=0, head={-2:0}, mylist={11:12}, temp={28255:0}, temp->key=2] [L550] CALL __VERIFIER_assert(temp->key==1) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, head={-2:0}] [L3] COND TRUE !(cond) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={-2:0}] [L4] __VERIFIER_error() VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 211.6s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 160.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 194 SDtfs, 420 SDslu, 709 SDs, 0 SdLazy, 1944 SolverSat, 258 SolverUnsat, 30 SolverUnknown, 0 SolverNotchecked, 58.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 577 GetRequests, 396 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 133.2s 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, 44 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 10.6s SatisfiabilityAnalysisTime, 36.8s InterpolantComputationTime, 401 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 431 ConstructedInterpolants, 12 QuantifiedInterpolants, 243810 SizeOfPredicates, 93 NumberOfNonLiveVariables, 2291 ConjunctsInSsa, 297 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 216/297 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! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...