/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-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:19:17,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:19:17,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:19:17,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:19:17,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:19:17,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:19:17,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:19:17,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:19:17,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:19:17,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:19:17,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:19:17,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:19:17,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:19:17,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:19:17,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:19:17,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:19:17,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:19:17,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:19:17,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:19:17,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:19:17,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:19:17,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:19:17,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:19:17,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:19:17,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 17:19:17,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 17:19:17,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 17:19:17,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 17:19:17,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 17:19:17,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 17:19:17,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 17:19:17,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 17:19:17,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 17:19:17,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 17:19:17,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 17:19:17,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 17:19:17,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 17:19:17,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 17:19:17,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:19:17,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:19:17,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:19:17,202 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 17:19:17,226 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:19:17,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:19:17,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:19:17,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:19:17,230 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:19:17,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:19:17,230 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:19:17,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:19:17,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:19:17,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:19:17,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:19:17,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:19:17,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:19:17,233 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:19:17,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:19:17,233 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:19:17,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:19:17,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:19:17,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:19:17,234 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:19:17,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:19:17,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:19:17,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:19:17,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:19:17,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:19:17,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:19:17,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:19:17,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:19:17,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:19:17,236 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 17:19:17,541 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:19:17,554 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:19:17,558 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:19:17,559 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:19:17,559 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:19:17,560 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-07-20 17:19:17,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbbdb03e9/0f47416c1a1d43adb162cf1515920dd7/FLAG9d3501975 [2020-07-20 17:19:18,178 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:19:18,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-07-20 17:19:18,191 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbbdb03e9/0f47416c1a1d43adb162cf1515920dd7/FLAG9d3501975 [2020-07-20 17:19:18,379 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbbdb03e9/0f47416c1a1d43adb162cf1515920dd7 [2020-07-20 17:19:18,387 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:19:18,390 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:19:18,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:19:18,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:19:18,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:19:18,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:19:18" (1/1) ... [2020-07-20 17:19:18,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc7a5b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:18, skipping insertion in model container [2020-07-20 17:19:18,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:19:18" (1/1) ... [2020-07-20 17:19:18,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:19:18,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:19:18,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:19:18,836 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:19:18,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:19:18,933 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:19:18,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:18 WrapperNode [2020-07-20 17:19:18,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:19:18,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:19:18,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:19:18,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:19:18,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:18" (1/1) ... [2020-07-20 17:19:18,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:18" (1/1) ... [2020-07-20 17:19:18,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:18" (1/1) ... [2020-07-20 17:19:18,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:18" (1/1) ... [2020-07-20 17:19:18,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:18" (1/1) ... [2020-07-20 17:19:18,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:18" (1/1) ... [2020-07-20 17:19:18,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:18" (1/1) ... [2020-07-20 17:19:18,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:19:18,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:19:18,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:19:18,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:19:18,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:18" (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 17:19:19,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:19:19,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:19:19,059 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 17:19:19,059 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 17:19:19,059 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-20 17:19:19,059 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-07-20 17:19:19,059 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-07-20 17:19:19,059 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-07-20 17:19:19,060 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:19:19,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:19:19,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:19:19,060 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 17:19:19,060 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 17:19:19,061 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 17:19:19,061 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 17:19:19,061 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 17:19:19,061 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 17:19:19,061 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 17:19:19,061 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 17:19:19,061 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 17:19:19,062 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 17:19:19,062 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 17:19:19,062 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 17:19:19,062 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 17:19:19,062 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 17:19:19,062 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 17:19:19,063 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 17:19:19,063 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 17:19:19,063 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 17:19:19,063 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 17:19:19,063 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 17:19:19,063 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 17:19:19,064 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 17:19:19,064 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 17:19:19,064 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 17:19:19,064 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 17:19:19,064 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 17:19:19,064 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 17:19:19,064 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 17:19:19,065 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 17:19:19,065 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 17:19:19,065 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 17:19:19,065 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 17:19:19,066 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 17:19:19,066 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 17:19:19,066 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 17:19:19,066 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 17:19:19,066 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 17:19:19,066 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 17:19:19,066 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 17:19:19,067 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 17:19:19,067 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 17:19:19,067 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 17:19:19,067 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 17:19:19,067 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 17:19:19,067 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 17:19:19,068 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 17:19:19,068 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 17:19:19,068 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 17:19:19,068 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 17:19:19,070 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 17:19:19,071 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 17:19:19,071 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 17:19:19,071 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:19:19,071 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 17:19:19,071 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 17:19:19,071 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 17:19:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 17:19:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 17:19:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 17:19:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 17:19:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 17:19:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:19:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 17:19:19,073 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 17:19:19,073 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 17:19:19,073 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 17:19:19,073 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 17:19:19,075 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 17:19:19,075 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 17:19:19,075 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 17:19:19,075 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 17:19:19,075 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 17:19:19,075 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 17:19:19,076 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 17:19:19,076 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 17:19:19,076 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 17:19:19,076 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 17:19:19,077 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 17:19:19,077 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 17:19:19,077 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 17:19:19,077 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 17:19:19,077 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 17:19:19,077 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 17:19:19,077 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 17:19:19,078 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 17:19:19,078 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 17:19:19,078 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 17:19:19,078 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 17:19:19,078 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 17:19:19,078 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 17:19:19,078 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 17:19:19,079 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 17:19:19,079 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 17:19:19,079 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 17:19:19,079 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 17:19:19,079 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 17:19:19,079 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 17:19:19,079 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 17:19:19,080 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 17:19:19,080 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 17:19:19,080 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 17:19:19,080 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 17:19:19,080 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 17:19:19,080 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 17:19:19,080 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 17:19:19,081 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-20 17:19:19,081 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-07-20 17:19:19,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:19:19,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 17:19:19,082 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-07-20 17:19:19,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 17:19:19,083 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-07-20 17:19:19,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:19:19,083 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:19:19,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:19:19,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:19:19,420 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-20 17:19:19,585 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:19:19,585 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 17:19:19,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:19:19 BoogieIcfgContainer [2020-07-20 17:19:19,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:19:19,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:19:19,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:19:19,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:19:19,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:19:18" (1/3) ... [2020-07-20 17:19:19,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cfd0427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:19:19, skipping insertion in model container [2020-07-20 17:19:19,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:18" (2/3) ... [2020-07-20 17:19:19,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cfd0427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:19:19, skipping insertion in model container [2020-07-20 17:19:19,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:19:19" (3/3) ... [2020-07-20 17:19:19,605 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-07-20 17:19:19,617 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:19:19,625 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:19:19,649 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:19:19,671 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:19:19,671 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:19:19,671 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:19:19,672 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:19:19,672 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:19:19,672 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:19:19,672 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:19:19,672 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:19:19,691 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-20 17:19:19,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 17:19:19,697 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:19:19,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:19:19,698 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:19:19,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:19:19,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1666427650, now seen corresponding path program 1 times [2020-07-20 17:19:19,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:19:19,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31883021] [2020-07-20 17:19:19,711 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 17:19:19,915 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:19:19,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:19:19,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 17:19:19,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:19:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:19:19,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:19:19,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31883021] [2020-07-20 17:19:19,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:19:19,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 17:19:19,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734030440] [2020-07-20 17:19:19,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 17:19:19,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:19:19,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 17:19:19,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:19:20,002 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-07-20 17:19:20,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:19:20,046 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2020-07-20 17:19:20,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 17:19:20,048 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2020-07-20 17:19:20,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:19:20,062 INFO L225 Difference]: With dead ends: 73 [2020-07-20 17:19:20,062 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 17:19:20,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:19:20,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 17:19:20,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 17:19:20,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 17:19:20,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-20 17:19:20,117 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-07-20 17:19:20,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:19:20,117 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-20 17:19:20,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 17:19:20,118 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-20 17:19:20,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 17:19:20,119 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:19:20,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:19:20,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:19:20,323 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:19:20,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:19:20,324 INFO L82 PathProgramCache]: Analyzing trace with hash -29727073, now seen corresponding path program 1 times [2020-07-20 17:19:20,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:19:20,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94399624] [2020-07-20 17:19:20,325 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 17:19:20,450 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:19:20,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:19:20,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:19:20,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:19:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:19:20,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:19:20,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94399624] [2020-07-20 17:19:20,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:19:20,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:19:20,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62862590] [2020-07-20 17:19:20,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:19:20,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:19:20,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:19:20,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:19:20,529 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-07-20 17:19:20,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:19:20,595 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-07-20 17:19:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:19:20,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-07-20 17:19:20,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:19:20,598 INFO L225 Difference]: With dead ends: 45 [2020-07-20 17:19:20,598 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 17:19:20,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:19:20,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 17:19:20,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-20 17:19:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 17:19:20,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-20 17:19:20,612 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-07-20 17:19:20,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:19:20,613 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-20 17:19:20,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:19:20,614 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-20 17:19:20,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 17:19:20,615 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:19:20,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:19:20,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:19:20,829 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:19:20,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:19:20,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1680455870, now seen corresponding path program 1 times [2020-07-20 17:19:20,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:19:20,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111415331] [2020-07-20 17:19:20,831 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 17:19:20,948 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:19:20,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:19:20,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 17:19:20,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:19:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:19:21,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:19:21,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111415331] [2020-07-20 17:19:21,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:19:21,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 17:19:21,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28265575] [2020-07-20 17:19:21,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 17:19:21,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:19:21,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 17:19:21,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:19:21,051 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2020-07-20 17:19:21,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:19:21,173 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-07-20 17:19:21,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 17:19:21,173 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-20 17:19:21,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:19:21,174 INFO L225 Difference]: With dead ends: 39 [2020-07-20 17:19:21,175 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 17:19:21,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-07-20 17:19:21,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 17:19:21,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 17:19:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 17:19:21,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-20 17:19:21,187 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 28 [2020-07-20 17:19:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:19:21,188 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-20 17:19:21,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 17:19:21,188 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-20 17:19:21,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 17:19:21,189 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:19:21,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:19:21,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:19:21,403 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:19:21,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:19:21,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1808388506, now seen corresponding path program 1 times [2020-07-20 17:19:21,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:19:21,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976044493] [2020-07-20 17:19:21,405 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 17:19:21,516 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:19:21,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:19:21,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:19:21,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:19:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 17:19:21,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:19:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 17:19:21,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976044493] [2020-07-20 17:19:21,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:19:21,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-20 17:19:21,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624680963] [2020-07-20 17:19:21,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 17:19:21,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:19:21,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 17:19:21,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:19:21,712 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 9 states. [2020-07-20 17:19:21,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:19:21,773 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-07-20 17:19:21,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:19:21,773 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-20 17:19:21,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:19:21,774 INFO L225 Difference]: With dead ends: 50 [2020-07-20 17:19:21,774 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 17:19:21,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-07-20 17:19:21,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 17:19:21,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-07-20 17:19:21,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 17:19:21,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-20 17:19:21,781 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2020-07-20 17:19:21,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:19:21,781 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-20 17:19:21,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 17:19:21,782 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-20 17:19:21,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 17:19:21,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:19:21,783 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:19:21,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:19:21,996 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:19:21,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:19:21,996 INFO L82 PathProgramCache]: Analyzing trace with hash 560900285, now seen corresponding path program 2 times [2020-07-20 17:19:21,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:19:21,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907125277] [2020-07-20 17:19:21,997 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 17:19:22,103 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:19:22,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:19:22,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-20 17:19:22,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:19:22,179 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 11 treesize of output 7 [2020-07-20 17:19:22,180 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:19:22,187 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:19:22,188 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 17:19:22,188 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2020-07-20 17:19:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:19:22,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:19:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:19:22,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907125277] [2020-07-20 17:19:22,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:19:22,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2020-07-20 17:19:22,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935491] [2020-07-20 17:19:22,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 17:19:22,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:19:22,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 17:19:22,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2020-07-20 17:19:22,592 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 20 states. [2020-07-20 17:19:24,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:19:24,917 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-07-20 17:19:24,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 17:19:24,918 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2020-07-20 17:19:24,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:19:24,918 INFO L225 Difference]: With dead ends: 43 [2020-07-20 17:19:24,919 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 17:19:24,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2020-07-20 17:19:24,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 17:19:24,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-07-20 17:19:24,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 17:19:24,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-07-20 17:19:24,925 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 32 [2020-07-20 17:19:24,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:19:24,926 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-07-20 17:19:24,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 17:19:24,926 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-07-20 17:19:24,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 17:19:24,927 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:19:24,927 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:19:25,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:19:25,129 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:19:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:19:25,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1724014721, now seen corresponding path program 3 times [2020-07-20 17:19:25,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:19:25,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814534050] [2020-07-20 17:19:25,132 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 17:19:25,232 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:19:25,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:19:25,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 17:19:25,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:19:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 17:19:25,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:19:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 17:19:25,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814534050] [2020-07-20 17:19:25,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:19:25,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-20 17:19:25,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873878028] [2020-07-20 17:19:25,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 17:19:25,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:19:25,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 17:19:25,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:19:25,335 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 9 states. [2020-07-20 17:19:25,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:19:25,408 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-20 17:19:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:19:25,409 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-07-20 17:19:25,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:19:25,413 INFO L225 Difference]: With dead ends: 52 [2020-07-20 17:19:25,413 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 17:19:25,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-20 17:19:25,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 17:19:25,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-07-20 17:19:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 17:19:25,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-07-20 17:19:25,426 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 33 [2020-07-20 17:19:25,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:19:25,427 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-07-20 17:19:25,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 17:19:25,427 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-07-20 17:19:25,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 17:19:25,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:19:25,429 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:19:25,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:19:25,645 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:19:25,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:19:25,646 INFO L82 PathProgramCache]: Analyzing trace with hash 458064125, now seen corresponding path program 4 times [2020-07-20 17:19:25,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:19:25,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769895573] [2020-07-20 17:19:25,647 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 17:19:25,752 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:19:25,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:19:25,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 56 conjunts are in the unsatisfiable core [2020-07-20 17:19:25,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:19:25,800 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 17:19:25,801 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:19:25,808 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:19:25,809 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:19:25,809 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:15 [2020-07-20 17:19:25,829 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 11 treesize of output 7 [2020-07-20 17:19:25,829 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:19:25,840 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:19:25,845 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 11 treesize of output 7 [2020-07-20 17:19:25,846 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:19:25,853 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:19:25,853 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:19:25,853 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:23 [2020-07-20 17:19:25,876 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:19:25,877 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-20 17:19:25,878 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:19:25,885 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:19:25,886 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:19:25,886 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:22 [2020-07-20 17:19:25,910 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-07-20 17:19:25,911 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:19:25,921 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:19:25,926 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-07-20 17:19:25,927 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:19:25,936 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:19:25,937 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:19:25,938 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:38 [2020-07-20 17:19:26,432 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 17:19:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:19:26,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:19:26,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:19:27,743 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_9 Int)) (= 0 (select (select (store |c_#memory_$Pointer$.base| c_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.base| c_sll_create_~new_head~0.base) v_prenex_9 c_sll_create_~head~0.base)) c_sll_create_~head~0.base) c_sll_create_~head~0.offset))) (forall ((v_sll_create_~head~0.offset_30 Int)) (= 0 (select (select (store |c_#memory_$Pointer$.offset| c_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.offset| c_sll_create_~new_head~0.base) v_sll_create_~head~0.offset_30 c_sll_create_~head~0.offset)) c_sll_create_~head~0.base) c_sll_create_~head~0.offset)))) is different from false [2020-07-20 17:19:27,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:19:27,824 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:19:27,851 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:19:27,854 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:19:27,892 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:19:27,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:19:27,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:19:27,896 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 17:19:27,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:19:27,897 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 17:19:27,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:19:27,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:19:27,900 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2020-07-20 17:19:27,901 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:77, output treesize:61 [2020-07-20 17:19:27,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:19:27,903 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 17:19:27,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:19:27,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:19:27,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:19:27,971 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 17:19:27,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:19:27,973 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 17:19:27,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:19:27,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:19:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2020-07-20 17:19:30,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769895573] [2020-07-20 17:19:30,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:19:30,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2020-07-20 17:19:30,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133576642] [2020-07-20 17:19:30,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 17:19:30,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:19:30,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 17:19:30,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=574, Unknown=2, NotChecked=48, Total=702 [2020-07-20 17:19:30,144 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 27 states. [2020-07-20 17:19:32,388 WARN L193 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2020-07-20 17:19:32,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:19:32,735 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-07-20 17:19:32,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 17:19:32,738 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2020-07-20 17:19:32,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:19:32,739 INFO L225 Difference]: With dead ends: 75 [2020-07-20 17:19:32,739 INFO L226 Difference]: Without dead ends: 65 [2020-07-20 17:19:32,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=90, Invalid=668, Unknown=2, NotChecked=52, Total=812 [2020-07-20 17:19:32,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-20 17:19:32,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2020-07-20 17:19:32,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 17:19:32,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-07-20 17:19:32,754 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 34 [2020-07-20 17:19:32,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:19:32,754 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-07-20 17:19:32,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 17:19:32,755 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-07-20 17:19:32,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 17:19:32,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:19:32,756 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:19:32,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:19:32,959 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:19:32,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:19:32,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2005342475, now seen corresponding path program 1 times [2020-07-20 17:19:32,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:19:32,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796203701] [2020-07-20 17:19:32,961 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 17:19:33,062 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:19:33,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:19:33,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 17:19:33,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:19:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 17:19:33,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:19:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 17:19:33,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796203701] [2020-07-20 17:19:33,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:19:33,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-20 17:19:33,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381639994] [2020-07-20 17:19:33,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 17:19:33,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:19:33,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 17:19:33,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-07-20 17:19:33,225 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 12 states. [2020-07-20 17:19:33,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:19:33,307 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2020-07-20 17:19:33,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 17:19:33,309 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-07-20 17:19:33,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:19:33,310 INFO L225 Difference]: With dead ends: 69 [2020-07-20 17:19:33,310 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 17:19:33,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-07-20 17:19:33,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 17:19:33,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-07-20 17:19:33,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 17:19:33,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-07-20 17:19:33,329 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 36 [2020-07-20 17:19:33,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:19:33,331 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-07-20 17:19:33,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 17:19:33,331 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-07-20 17:19:33,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 17:19:33,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:19:33,335 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-07-20 17:19:33,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:19:33,550 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:19:33,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:19:33,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1775282106, now seen corresponding path program 5 times [2020-07-20 17:19:33,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:19:33,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217764327] [2020-07-20 17:19:33,552 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:19:33,667 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:19:33,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:19:33,668 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:19:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:19:33,686 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:19:33,717 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:19:33,718 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:19:33,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:19:33,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:19:33 BoogieIcfgContainer [2020-07-20 17:19:33,968 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:19:33,970 INFO L168 Benchmark]: Toolchain (without parser) took 15581.52 ms. Allocated memory was 144.2 MB in the beginning and 287.8 MB in the end (delta: 143.7 MB). Free memory was 99.3 MB in the beginning and 93.0 MB in the end (delta: 6.3 MB). Peak memory consumption was 150.0 MB. Max. memory is 7.1 GB. [2020-07-20 17:19:33,971 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 17:19:33,972 INFO L168 Benchmark]: CACSL2BoogieTranslator took 543.08 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 98.9 MB in the beginning and 168.4 MB in the end (delta: -69.5 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:19:33,973 INFO L168 Benchmark]: Boogie Preprocessor took 60.48 ms. Allocated memory is still 201.3 MB. Free memory was 168.4 MB in the beginning and 165.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:19:33,974 INFO L168 Benchmark]: RCFGBuilder took 597.48 ms. Allocated memory is still 201.3 MB. Free memory was 165.7 MB in the beginning and 122.5 MB in the end (delta: 43.2 MB). Peak memory consumption was 43.2 MB. Max. memory is 7.1 GB. [2020-07-20 17:19:33,975 INFO L168 Benchmark]: TraceAbstraction took 14374.04 ms. Allocated memory was 201.3 MB in the beginning and 287.8 MB in the end (delta: 86.5 MB). Free memory was 121.8 MB in the beginning and 93.0 MB in the end (delta: 28.8 MB). Peak memory consumption was 115.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:19:33,978 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 543.08 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 98.9 MB in the beginning and 168.4 MB in the end (delta: -69.5 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 60.48 ms. Allocated memory is still 201.3 MB. Free memory was 168.4 MB in the beginning and 165.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 597.48 ms. Allocated memory is still 201.3 MB. Free memory was 165.7 MB in the beginning and 122.5 MB in the end (delta: 43.2 MB). Peak memory consumption was 43.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14374.04 ms. Allocated memory was 201.3 MB in the beginning and 287.8 MB in the end (delta: 86.5 MB). Free memory was 121.8 MB in the beginning and 93.0 MB in the end (delta: 28.8 MB). Peak memory consumption was 115.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L592] int len = 2; VAL [len=2] [L593] len < 32 && __VERIFIER_nondet_int() [L593] len < 32 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, len=2, len < 32 && __VERIFIER_nondet_int()=0] [L593] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L596] CALL, EXPR sll_create(len + 1) VAL [\old(len)=3] [L564] SLL head = ((void *)0); VAL [\old(len)=3, head={0:0}, len=3] [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L570] new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={-2:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={-2:0}, len=2, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-2:0}, len=2, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L570] new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={-1:0}, len=1, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={-1:0}, len=1, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-1:0}, len=1, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L570] new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={-3:0}, len=0, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L565] COND FALSE !(len > 0) VAL [\old(len)=3, head={-3:0}, len=0, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L574] return head; VAL [\old(len)=3, \result={-3:0}, head={-3:0}, len=0, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L596] RET, EXPR sll_create(len + 1) VAL [len=2, sll_create(len + 1)={-3:0}] [L596] SLL s = sll_create(len + 1); [L597] CALL, EXPR sll_length(s) VAL [head={-3:0}] [L577] int len = 0; VAL [head={-3:0}, head={-3:0}, len=0] [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND FALSE !(\read(head)) VAL [head={0:0}, head={-3:0}, len=3] [L582] return len; VAL [\result=3, head={0:0}, head={-3:0}, len=3] [L597] RET, EXPR sll_length(s) VAL [len=2, s={-3:0}, sll_length(s)=3] [L597] COND TRUE len != sll_length(s) [L602] __VERIFIER_error() VAL [len=2, s={-3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.2s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 242 SDtfs, 192 SDslu, 1218 SDs, 0 SdLazy, 615 SolverSat, 40 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 3.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 410 GetRequests, 309 SyntacticMatches, 10 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 24 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 277 NumberOfCodeBlocks, 224 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 391 ConstructedInterpolants, 19 QuantifiedInterpolants, 83664 SizeOfPredicates, 41 NumberOfNonLiveVariables, 914 ConjunctsInSsa, 141 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 32/77 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...