/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:14:09,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:14:09,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:14:09,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:14:09,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:14:09,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:14:09,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:14:09,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:14:09,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:14:09,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:14:09,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:14:09,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:14:09,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:14:09,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:14:09,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:14:09,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:14:09,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:14:09,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:14:09,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:14:09,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:14:09,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:14:09,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:14:09,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:14:09,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:14:09,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:14:09,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:14:09,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:14:09,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:14:09,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:14:09,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:14:09,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:14:09,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:14:09,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:14:09,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:14:09,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:14:09,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:14:09,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:14:09,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:14:09,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:14:09,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:14:09,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:14:09,394 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 11:14:09,412 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:14:09,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:14:09,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:14:09,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:14:09,414 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:14:09,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:14:09,414 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:14:09,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:14:09,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:14:09,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:14:09,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:14:09,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:14:09,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:14:09,416 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:14:09,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:14:09,416 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:14:09,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:14:09,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:14:09,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:14:09,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:14:09,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:14:09,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:14:09,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:14:09,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:14:09,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:14:09,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:14:09,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:09,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:14:09,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:14:09,419 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 11:14:09,710 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:14:09,727 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:14:09,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:14:09,733 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:14:09,734 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:14:09,735 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-07-21 11:14:09,835 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b571c437/108847295e0b4415900cd55fe44c63f0/FLAGac0e59836 [2020-07-21 11:14:10,484 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:14:10,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-07-21 11:14:10,510 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b571c437/108847295e0b4415900cd55fe44c63f0/FLAGac0e59836 [2020-07-21 11:14:10,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b571c437/108847295e0b4415900cd55fe44c63f0 [2020-07-21 11:14:10,695 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:14:10,699 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:14:10,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:14:10,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:14:10,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:14:10,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:14:10" (1/1) ... [2020-07-21 11:14:10,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22bae889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:10, skipping insertion in model container [2020-07-21 11:14:10,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:14:10" (1/1) ... [2020-07-21 11:14:10,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:14:10,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:14:11,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:14:11,319 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:14:11,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:14:11,464 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:14:11,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:11 WrapperNode [2020-07-21 11:14:11,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:14:11,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:14:11,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:14:11,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:14:11,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:11" (1/1) ... [2020-07-21 11:14:11,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:11" (1/1) ... [2020-07-21 11:14:11,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:11" (1/1) ... [2020-07-21 11:14:11,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:11" (1/1) ... [2020-07-21 11:14:11,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:11" (1/1) ... [2020-07-21 11:14:11,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:11" (1/1) ... [2020-07-21 11:14:11,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:11" (1/1) ... [2020-07-21 11:14:11,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:14:11,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:14:11,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:14:11,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:14:11,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:14:11,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:14:11,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:14:11,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 11:14:11,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 11:14:11,656 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-07-21 11:14:11,656 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-07-21 11:14:11,656 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-07-21 11:14:11,656 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-07-21 11:14:11,656 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-07-21 11:14:11,657 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-07-21 11:14:11,657 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:14:11,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:14:11,657 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 11:14:11,657 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 11:14:11,657 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 11:14:11,658 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 11:14:11,658 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 11:14:11,658 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 11:14:11,658 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 11:14:11,658 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 11:14:11,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 11:14:11,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 11:14:11,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 11:14:11,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 11:14:11,660 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 11:14:11,660 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 11:14:11,660 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 11:14:11,660 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 11:14:11,660 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 11:14:11,661 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 11:14:11,661 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 11:14:11,661 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 11:14:11,661 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 11:14:11,661 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 11:14:11,662 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 11:14:11,662 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 11:14:11,662 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 11:14:11,662 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 11:14:11,662 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 11:14:11,663 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 11:14:11,663 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 11:14:11,663 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 11:14:11,663 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 11:14:11,663 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 11:14:11,663 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 11:14:11,664 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 11:14:11,664 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 11:14:11,664 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 11:14:11,664 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 11:14:11,664 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 11:14:11,664 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 11:14:11,665 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 11:14:11,665 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 11:14:11,665 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 11:14:11,665 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 11:14:11,665 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 11:14:11,665 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 11:14:11,665 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 11:14:11,666 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 11:14:11,666 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 11:14:11,666 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 11:14:11,666 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 11:14:11,666 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 11:14:11,667 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 11:14:11,667 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 11:14:11,667 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 11:14:11,667 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 11:14:11,667 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 11:14:11,667 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 11:14:11,668 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 11:14:11,668 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 11:14:11,668 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 11:14:11,668 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:14:11,668 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 11:14:11,668 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 11:14:11,669 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 11:14:11,669 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 11:14:11,669 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 11:14:11,669 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 11:14:11,669 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 11:14:11,669 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 11:14:11,670 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 11:14:11,670 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 11:14:11,670 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 11:14:11,670 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 11:14:11,670 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 11:14:11,670 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 11:14:11,671 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 11:14:11,671 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 11:14:11,671 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 11:14:11,671 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 11:14:11,671 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 11:14:11,671 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 11:14:11,672 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 11:14:11,672 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 11:14:11,672 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 11:14:11,672 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 11:14:11,672 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 11:14:11,672 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 11:14:11,672 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 11:14:11,673 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 11:14:11,673 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 11:14:11,673 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 11:14:11,673 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 11:14:11,673 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 11:14:11,673 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 11:14:11,673 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 11:14:11,674 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 11:14:11,674 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 11:14:11,674 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 11:14:11,674 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 11:14:11,674 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 11:14:11,674 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 11:14:11,674 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 11:14:11,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:14:11,675 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-07-21 11:14:11,675 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-07-21 11:14:11,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 11:14:11,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 11:14:11,675 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-07-21 11:14:11,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:14:11,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:14:11,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:14:11,676 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-07-21 11:14:11,676 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-07-21 11:14:11,676 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-07-21 11:14:11,676 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:14:11,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 11:14:11,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:14:11,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:14:11,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:14:12,578 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:14:12,578 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-07-21 11:14:12,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:14:12 BoogieIcfgContainer [2020-07-21 11:14:12,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:14:12,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:14:12,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:14:12,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:14:12,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:14:10" (1/3) ... [2020-07-21 11:14:12,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b4a9b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:14:12, skipping insertion in model container [2020-07-21 11:14:12,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:11" (2/3) ... [2020-07-21 11:14:12,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b4a9b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:14:12, skipping insertion in model container [2020-07-21 11:14:12,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:14:12" (3/3) ... [2020-07-21 11:14:12,596 INFO L109 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2020-07-21 11:14:12,609 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:14:12,619 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:14:12,637 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:14:12,669 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:14:12,669 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:14:12,690 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:14:12,690 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:14:12,690 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:14:12,690 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:14:12,691 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:14:12,691 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:14:12,731 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-07-21 11:14:12,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 11:14:12,738 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:12,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:12,740 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:12,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:12,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1873878464, now seen corresponding path program 1 times [2020-07-21 11:14:12,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:12,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642585465] [2020-07-21 11:14:12,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:12,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:14:12,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:12,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:12,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642585465] [2020-07-21 11:14:12,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:12,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:14:12,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198126820] [2020-07-21 11:14:12,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:14:12,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:12,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:14:12,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:14:12,976 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 2 states. [2020-07-21 11:14:13,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:13,057 INFO L93 Difference]: Finished difference Result 222 states and 373 transitions. [2020-07-21 11:14:13,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:14:13,059 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-07-21 11:14:13,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:13,083 INFO L225 Difference]: With dead ends: 222 [2020-07-21 11:14:13,084 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 11:14:13,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:14:13,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 11:14:13,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-07-21 11:14:13,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-21 11:14:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2020-07-21 11:14:13,204 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 13 [2020-07-21 11:14:13,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:13,205 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2020-07-21 11:14:13,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:14:13,206 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2020-07-21 11:14:13,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 11:14:13,206 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:13,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:13,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:13,422 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:13,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:13,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1323314826, now seen corresponding path program 1 times [2020-07-21 11:14:13,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:13,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640435926] [2020-07-21 11:14:13,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:13,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 11:14:13,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:13,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:13,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640435926] [2020-07-21 11:14:13,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:13,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:13,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2820977] [2020-07-21 11:14:13,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:13,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:13,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:13,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:13,580 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand 3 states. [2020-07-21 11:14:13,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:13,653 INFO L93 Difference]: Finished difference Result 200 states and 246 transitions. [2020-07-21 11:14:13,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:13,657 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-21 11:14:13,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:13,659 INFO L225 Difference]: With dead ends: 200 [2020-07-21 11:14:13,659 INFO L226 Difference]: Without dead ends: 109 [2020-07-21 11:14:13,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:13,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-07-21 11:14:13,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2020-07-21 11:14:13,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-21 11:14:13,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-07-21 11:14:13,681 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 14 [2020-07-21 11:14:13,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:13,682 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-07-21 11:14:13,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:13,682 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-07-21 11:14:13,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:14:13,683 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:13,683 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:13,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:13,897 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:13,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:13,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1684995551, now seen corresponding path program 1 times [2020-07-21 11:14:13,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:13,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164160821] [2020-07-21 11:14:13,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:14,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 11:14:14,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:14,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:14,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164160821] [2020-07-21 11:14:14,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:14,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 11:14:14,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203595297] [2020-07-21 11:14:14,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 11:14:14,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:14,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 11:14:14,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:14:14,072 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 7 states. [2020-07-21 11:14:14,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:14,329 INFO L93 Difference]: Finished difference Result 149 states and 182 transitions. [2020-07-21 11:14:14,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 11:14:14,331 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-21 11:14:14,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:14,333 INFO L225 Difference]: With dead ends: 149 [2020-07-21 11:14:14,333 INFO L226 Difference]: Without dead ends: 144 [2020-07-21 11:14:14,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-21 11:14:14,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-21 11:14:14,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 108. [2020-07-21 11:14:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-21 11:14:14,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 131 transitions. [2020-07-21 11:14:14,373 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 131 transitions. Word has length 20 [2020-07-21 11:14:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:14,378 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 131 transitions. [2020-07-21 11:14:14,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 11:14:14,378 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 131 transitions. [2020-07-21 11:14:14,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 11:14:14,379 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:14,379 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:14,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:14,595 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:14,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:14,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1145945773, now seen corresponding path program 1 times [2020-07-21 11:14:14,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:14,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727700641] [2020-07-21 11:14:14,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:14,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 11:14:14,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:14,787 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-07-21 11:14:14,788 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:14,797 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:14:14,801 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-07-21 11:14:14,802 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:14,809 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:14:14,810 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:14:14,810 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-07-21 11:14:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 11:14:14,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:14,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727700641] [2020-07-21 11:14:14,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:14,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:14:14,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559051302] [2020-07-21 11:14:14,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:14:14,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:14,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:14:14,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:14:14,825 INFO L87 Difference]: Start difference. First operand 108 states and 131 transitions. Second operand 5 states. [2020-07-21 11:14:15,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:15,003 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2020-07-21 11:14:15,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:14:15,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-21 11:14:15,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:15,006 INFO L225 Difference]: With dead ends: 110 [2020-07-21 11:14:15,006 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 11:14:15,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:14:15,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 11:14:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-07-21 11:14:15,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 11:14:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2020-07-21 11:14:15,017 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 27 [2020-07-21 11:14:15,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:15,017 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2020-07-21 11:14:15,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:14:15,018 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2020-07-21 11:14:15,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 11:14:15,019 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:15,019 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:15,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:15,234 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:15,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:15,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1471361763, now seen corresponding path program 1 times [2020-07-21 11:14:15,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:15,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677856008] [2020-07-21 11:14:15,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:15,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 11:14:15,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:15,365 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:14:15,379 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2020-07-21 11:14:15,380 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:15,385 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2020-07-21 11:14:15,386 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:15,402 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:14:15,407 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2020-07-21 11:14:15,408 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:15,412 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2020-07-21 11:14:15,412 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:15,417 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:14:15,418 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-21 11:14:15,418 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:59, output treesize:9 [2020-07-21 11:14:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 11:14:15,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:15,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677856008] [2020-07-21 11:14:15,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:15,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:14:15,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474833541] [2020-07-21 11:14:15,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:14:15,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:15,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:14:15,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:14:15,436 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand 5 states. [2020-07-21 11:14:15,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:15,619 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2020-07-21 11:14:15,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:14:15,619 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-21 11:14:15,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:15,621 INFO L225 Difference]: With dead ends: 109 [2020-07-21 11:14:15,621 INFO L226 Difference]: Without dead ends: 106 [2020-07-21 11:14:15,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:14:15,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-21 11:14:15,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-07-21 11:14:15,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-21 11:14:15,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2020-07-21 11:14:15,632 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 27 [2020-07-21 11:14:15,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:15,632 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2020-07-21 11:14:15,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:14:15,632 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2020-07-21 11:14:15,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 11:14:15,634 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:15,634 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:15,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:15,847 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:15,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:15,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1648323131, now seen corresponding path program 1 times [2020-07-21 11:14:15,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:15,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746116994] [2020-07-21 11:14:15,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:15,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 11:14:15,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:16,001 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2020-07-21 11:14:16,001 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:16,013 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:14:16,014 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:14:16,015 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:12 [2020-07-21 11:14:16,076 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2020-07-21 11:14:16,077 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:16,079 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:14:16,080 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:14:16,081 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2020-07-21 11:14:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:16,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:16,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746116994] [2020-07-21 11:14:16,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:16,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 11:14:16,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814585469] [2020-07-21 11:14:16,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 11:14:16,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:16,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 11:14:16,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-21 11:14:16,098 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand 9 states. [2020-07-21 11:14:16,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:16,457 INFO L93 Difference]: Finished difference Result 143 states and 169 transitions. [2020-07-21 11:14:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 11:14:16,458 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-07-21 11:14:16,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:16,459 INFO L225 Difference]: With dead ends: 143 [2020-07-21 11:14:16,459 INFO L226 Difference]: Without dead ends: 140 [2020-07-21 11:14:16,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-07-21 11:14:16,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-21 11:14:16,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 112. [2020-07-21 11:14:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-21 11:14:16,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2020-07-21 11:14:16,469 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 30 [2020-07-21 11:14:16,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:16,469 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2020-07-21 11:14:16,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 11:14:16,470 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2020-07-21 11:14:16,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 11:14:16,471 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:16,471 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:16,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:16,685 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:16,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:16,686 INFO L82 PathProgramCache]: Analyzing trace with hash 861386650, now seen corresponding path program 1 times [2020-07-21 11:14:16,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:16,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672829051] [2020-07-21 11:14:16,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:16,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 11:14:16,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:16,832 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2020-07-21 11:14:16,833 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:16,843 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:14:16,851 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2020-07-21 11:14:16,852 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:16,860 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:14:16,861 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:14:16,862 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:32, output treesize:18 [2020-07-21 11:14:16,916 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 11:14:16,917 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:16,924 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:14:16,927 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 11:14:16,928 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:16,931 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:14:16,932 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:14:16,932 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-07-21 11:14:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:16,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:14:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:17,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672829051] [2020-07-21 11:14:17,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:14:17,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-21 11:14:17,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315899070] [2020-07-21 11:14:17,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 11:14:17,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:17,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 11:14:17,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-07-21 11:14:17,022 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand 11 states. [2020-07-21 11:14:17,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:17,394 INFO L93 Difference]: Finished difference Result 229 states and 274 transitions. [2020-07-21 11:14:17,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 11:14:17,395 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-07-21 11:14:17,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:17,397 INFO L225 Difference]: With dead ends: 229 [2020-07-21 11:14:17,397 INFO L226 Difference]: Without dead ends: 145 [2020-07-21 11:14:17,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-07-21 11:14:17,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-21 11:14:17,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 138. [2020-07-21 11:14:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-21 11:14:17,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2020-07-21 11:14:17,408 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 30 [2020-07-21 11:14:17,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:17,409 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2020-07-21 11:14:17,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 11:14:17,409 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2020-07-21 11:14:17,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 11:14:17,410 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:17,410 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:17,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:17,624 INFO L427 AbstractCegarLoop]: === Iteration 8 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:17,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:17,625 INFO L82 PathProgramCache]: Analyzing trace with hash 671486784, now seen corresponding path program 1 times [2020-07-21 11:14:17,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:17,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226894166] [2020-07-21 11:14:17,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:14:17,729 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:14:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:14:17,749 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:14:17,773 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:14:17,773 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:14:17,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:18,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:14:18 BoogieIcfgContainer [2020-07-21 11:14:18,025 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:14:18,027 INFO L168 Benchmark]: Toolchain (without parser) took 7330.35 ms. Allocated memory was 142.6 MB in the beginning and 284.2 MB in the end (delta: 141.6 MB). Free memory was 102.3 MB in the beginning and 144.0 MB in the end (delta: -41.7 MB). Peak memory consumption was 99.9 MB. Max. memory is 7.1 GB. [2020-07-21 11:14:18,028 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 142.6 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 11:14:18,029 INFO L168 Benchmark]: CACSL2BoogieTranslator took 765.87 ms. Allocated memory was 142.6 MB in the beginning and 203.9 MB in the end (delta: 61.3 MB). Free memory was 101.9 MB in the beginning and 168.5 MB in the end (delta: -66.6 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:14:18,029 INFO L168 Benchmark]: Boogie Preprocessor took 113.14 ms. Allocated memory is still 203.9 MB. Free memory was 168.5 MB in the beginning and 164.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. [2020-07-21 11:14:18,030 INFO L168 Benchmark]: RCFGBuilder took 1004.81 ms. Allocated memory is still 203.9 MB. Free memory was 164.5 MB in the beginning and 96.2 MB in the end (delta: 68.4 MB). Peak memory consumption was 68.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:14:18,031 INFO L168 Benchmark]: TraceAbstraction took 5439.11 ms. Allocated memory was 203.9 MB in the beginning and 284.2 MB in the end (delta: 80.2 MB). Free memory was 95.5 MB in the beginning and 144.0 MB in the end (delta: -48.5 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:14:18,034 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 142.6 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 765.87 ms. Allocated memory was 142.6 MB in the beginning and 203.9 MB in the end (delta: 61.3 MB). Free memory was 101.9 MB in the beginning and 168.5 MB in the end (delta: -66.6 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.14 ms. Allocated memory is still 203.9 MB. Free memory was 168.5 MB in the beginning and 164.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1004.81 ms. Allocated memory is still 203.9 MB. Free memory was 164.5 MB in the beginning and 96.2 MB in the end (delta: 68.4 MB). Peak memory consumption was 68.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5439.11 ms. Allocated memory was 203.9 MB in the beginning and 284.2 MB in the end (delta: 80.2 MB). Free memory was 95.5 MB in the beginning and 144.0 MB in the end (delta: -48.5 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 554]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L627] struct list *data = ((void *)0); VAL [data={0:0}] [L628] COND TRUE __VERIFIER_nondet_int() [L629] struct node *node = malloc(sizeof *node); VAL [data={0:0}, malloc(sizeof *node)={2439:0}, node={2439:0}] [L630] COND FALSE !(!node) VAL [data={0:0}, malloc(sizeof *node)={2439:0}, node={2439:0}] [L632] node->next = node [L633] node->value = __VERIFIER_nondet_int() [L634] struct list *item = malloc(sizeof *item); VAL [data={0:0}, item={2438:0}, malloc(sizeof *item)={2438:0}, malloc(sizeof *node)={2439:0}, node={2439:0}] [L635] COND FALSE !(!item) VAL [data={0:0}, item={2438:0}, malloc(sizeof *item)={2438:0}, malloc(sizeof *node)={2439:0}, node={2439:0}] [L637] item->slist = node [L638] item->next = data [L639] data = item VAL [data={2438:0}, item={2438:0}, malloc(sizeof *item)={2438:0}, malloc(sizeof *node)={2439:0}, node={2439:0}] [L628] COND FALSE !(__VERIFIER_nondet_int()) [L641] COND FALSE !(!data) VAL [data={2438:0}, item={2438:0}, malloc(sizeof *item)={2438:0}, malloc(sizeof *node)={2439:0}, node={2439:0}] [L643] CALL inspect_before(data) VAL [shape={2438:0}] [L604] COND FALSE !(!(shape)) VAL [shape={2438:0}, shape={2438:0}] [L605] shape->next VAL [shape={2438:0}, shape={2438:0}, shape->next={0:0}] [L605] COND FALSE !(shape->next) [L611] COND FALSE !(!(shape)) VAL [shape={2438:0}, shape={2438:0}] [L612] EXPR shape->next VAL [shape={2438:0}, shape={2438:0}, shape->next={0:0}] [L612] COND FALSE !(!(shape->next == ((void *)0))) [L613] EXPR shape->slist VAL [shape={2438:0}, shape={2438:0}, shape->slist={2439:0}] [L613] COND FALSE !(!(shape->slist)) [L614] EXPR shape->slist [L614] EXPR shape->slist->next VAL [shape={2438:0}, shape={2438:0}, shape->slist={2439:0}, shape->slist->next={2439:0}] [L614] COND TRUE !(shape->slist->next == ((void *)0)) [L614] CALL fail() [L554] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 121 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.3s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 815 SDtfs, 335 SDslu, 2392 SDs, 0 SdLazy, 734 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 198 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 75 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 194 NumberOfCodeBlocks, 194 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 183 ConstructedInterpolants, 0 QuantifiedInterpolants, 25561 SizeOfPredicates, 41 NumberOfNonLiveVariables, 695 ConjunctsInSsa, 98 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 8/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...