/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -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 0.1.25-79ed534 [2020-07-19 23:19:02,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:19:02,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:19:02,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:19:02,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:19:02,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:19:02,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:19:02,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:19:02,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:19:02,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:19:02,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:19:02,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:19:02,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:19:02,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:19:02,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:19:02,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:19:02,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:19:02,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:19:02,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:19:02,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:19:02,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:19:02,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:19:02,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:19:02,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:19:02,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-19 23:19:02,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-19 23:19:02,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-19 23:19:02,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-19 23:19:02,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-19 23:19:02,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-19 23:19:02,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-19 23:19:02,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-19 23:19:02,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-19 23:19:02,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-19 23:19:02,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-19 23:19:02,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-19 23:19:02,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-19 23:19:02,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-19 23:19:02,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:19:02,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:19:02,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:19:02,574 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 [2020-07-19 23:19:02,587 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:19:02,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:19:02,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:19:02,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:19:02,589 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:19:02,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:19:02,590 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:19:02,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:19:02,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:19:02,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:19:02,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:19:02,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:19:02,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:19:02,591 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:19:02,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:19:02,591 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:19:02,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:19:02,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:19:02,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:19:02,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:19:02,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:19:02,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:19:02,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:19:02,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:19:02,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:19:02,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:19:02,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:19:02,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:19:02,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:19:02,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-19 23:19:02,864 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:19:02,874 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:19:02,878 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:19:02,879 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:19:02,882 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:19:02,886 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-07-19 23:19:02,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/403e0d201/9c51c7affde34a5580966b50c9631049/FLAGf60b5b68d [2020-07-19 23:19:03,503 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:19:03,504 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-07-19 23:19:03,523 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/403e0d201/9c51c7affde34a5580966b50c9631049/FLAGf60b5b68d [2020-07-19 23:19:03,773 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/403e0d201/9c51c7affde34a5580966b50c9631049 [2020-07-19 23:19:03,783 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:19:03,787 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:19:03,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:19:03,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:19:03,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:19:03,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:19:03" (1/1) ... [2020-07-19 23:19:03,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44193db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:19:03, skipping insertion in model container [2020-07-19 23:19:03,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:19:03" (1/1) ... [2020-07-19 23:19:03,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:19:03,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:19:04,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:19:04,333 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:19:04,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:19:04,447 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:19:04,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:19:04 WrapperNode [2020-07-19 23:19:04,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:19:04,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:19:04,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:19:04,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:19:04,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:19:04" (1/1) ... [2020-07-19 23:19:04,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:19:04" (1/1) ... [2020-07-19 23:19:04,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:19:04" (1/1) ... [2020-07-19 23:19:04,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:19:04" (1/1) ... [2020-07-19 23:19:04,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:19:04" (1/1) ... [2020-07-19 23:19:04,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:19:04" (1/1) ... [2020-07-19 23:19:04,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:19:04" (1/1) ... [2020-07-19 23:19:04,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:19:04,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:19:04,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:19:04,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:19:04,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:19:04" (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 [2020-07-19 23:19:04,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:19:04,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:19:04,602 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-19 23:19:04,602 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-19 23:19:04,602 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-07-19 23:19:04,602 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-07-19 23:19:04,603 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-07-19 23:19:04,604 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-07-19 23:19:04,604 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-07-19 23:19:04,604 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-07-19 23:19:04,604 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:19:04,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:19:04,605 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-19 23:19:04,606 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-19 23:19:04,606 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-19 23:19:04,607 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-19 23:19:04,607 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-19 23:19:04,607 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-19 23:19:04,608 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-19 23:19:04,608 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-19 23:19:04,608 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-19 23:19:04,609 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-19 23:19:04,609 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-19 23:19:04,609 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-19 23:19:04,610 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-19 23:19:04,612 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-19 23:19:04,612 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-19 23:19:04,612 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-19 23:19:04,612 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-19 23:19:04,612 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-19 23:19:04,613 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-19 23:19:04,613 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-19 23:19:04,613 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-19 23:19:04,613 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-19 23:19:04,613 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-19 23:19:04,613 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-19 23:19:04,613 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-19 23:19:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-19 23:19:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-19 23:19:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-19 23:19:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-19 23:19:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-19 23:19:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-19 23:19:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-19 23:19:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-19 23:19:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-19 23:19:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-19 23:19:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-19 23:19:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-19 23:19:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-19 23:19:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-19 23:19:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-19 23:19:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-19 23:19:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-19 23:19:04,616 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-19 23:19:04,616 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-19 23:19:04,616 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-19 23:19:04,616 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-19 23:19:04,616 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-19 23:19:04,616 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-19 23:19:04,617 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-19 23:19:04,617 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-19 23:19:04,617 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-19 23:19:04,617 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-19 23:19:04,617 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-19 23:19:04,617 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-19 23:19:04,617 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-19 23:19:04,618 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-19 23:19:04,618 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-19 23:19:04,618 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-19 23:19:04,618 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-19 23:19:04,618 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-19 23:19:04,618 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 23:19:04,619 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-19 23:19:04,619 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-19 23:19:04,619 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-19 23:19:04,619 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-19 23:19:04,619 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-19 23:19:04,619 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-19 23:19:04,619 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-19 23:19:04,620 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-19 23:19:04,620 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-19 23:19:04,620 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-19 23:19:04,620 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-19 23:19:04,620 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-19 23:19:04,620 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-19 23:19:04,620 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-19 23:19:04,621 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-19 23:19:04,621 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-19 23:19:04,621 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-19 23:19:04,621 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-19 23:19:04,621 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-19 23:19:04,621 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-19 23:19:04,621 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-19 23:19:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-19 23:19:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-19 23:19:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-19 23:19:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-19 23:19:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-19 23:19:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-19 23:19:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-19 23:19:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-19 23:19:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-19 23:19:04,623 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-19 23:19:04,623 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-19 23:19:04,623 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-19 23:19:04,623 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-19 23:19:04,623 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-19 23:19:04,623 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-19 23:19:04,623 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-19 23:19:04,623 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-19 23:19:04,623 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-19 23:19:04,623 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-19 23:19:04,623 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-19 23:19:04,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:19:04,624 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-07-19 23:19:04,624 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-07-19 23:19:04,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-19 23:19:04,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-19 23:19:04,624 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-07-19 23:19:04,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 23:19:04,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 23:19:04,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 23:19:04,625 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-07-19 23:19:04,625 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-07-19 23:19:04,625 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-07-19 23:19:04,625 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:19:04,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-19 23:19:04,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 23:19:04,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:19:04,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:19:05,389 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:19:05,390 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-07-19 23:19:05,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:19:05 BoogieIcfgContainer [2020-07-19 23:19:05,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:19:05,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:19:05,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:19:05,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:19:05,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:19:03" (1/3) ... [2020-07-19 23:19:05,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5bbb5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:19:05, skipping insertion in model container [2020-07-19 23:19:05,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:19:04" (2/3) ... [2020-07-19 23:19:05,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5bbb5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:19:05, skipping insertion in model container [2020-07-19 23:19:05,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:19:05" (3/3) ... [2020-07-19 23:19:05,404 INFO L109 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2020-07-19 23:19:05,415 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:19:05,424 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:19:05,440 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:19:05,485 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:19:05,485 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:19:05,485 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:19:05,485 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:19:05,486 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:19:05,486 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:19:05,486 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:19:05,486 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:19:05,509 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-07-19 23:19:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 23:19:05,516 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:19:05,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:19:05,518 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:19:05,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:19:05,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1873878464, now seen corresponding path program 1 times [2020-07-19 23:19:05,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:19:05,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463781077] [2020-07-19 23:19:05,535 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29a1a4a7 [2020-07-19 23:19:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:19:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:19:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:19:05,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463781077] [2020-07-19 23:19:05,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:19:05,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 23:19:05,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556728691] [2020-07-19 23:19:05,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 23:19:05,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:19:05,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 23:19:05,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:19:05,731 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 3 states. [2020-07-19 23:19:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:19:05,962 INFO L93 Difference]: Finished difference Result 240 states and 408 transitions. [2020-07-19 23:19:05,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 23:19:05,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-19 23:19:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:19:05,979 INFO L225 Difference]: With dead ends: 240 [2020-07-19 23:19:05,979 INFO L226 Difference]: Without dead ends: 118 [2020-07-19 23:19:05,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:19:06,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-19 23:19:06,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2020-07-19 23:19:06,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-19 23:19:06,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2020-07-19 23:19:06,049 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 13 [2020-07-19 23:19:06,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:19:06,049 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2020-07-19 23:19:06,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 23:19:06,050 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2020-07-19 23:19:06,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-19 23:19:06,051 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:19:06,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:19:06,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:19:06,053 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:19:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:19:06,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1323314826, now seen corresponding path program 1 times [2020-07-19 23:19:06,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:19:06,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030032185] [2020-07-19 23:19:06,054 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29a1a4a7 [2020-07-19 23:19:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:19:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:19:06,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:19:06,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030032185] [2020-07-19 23:19:06,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:19:06,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 23:19:06,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584235739] [2020-07-19 23:19:06,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 23:19:06,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:19:06,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 23:19:06,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:19:06,172 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand 4 states. [2020-07-19 23:19:06,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:19:06,503 INFO L93 Difference]: Finished difference Result 206 states and 255 transitions. [2020-07-19 23:19:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:19:06,504 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-19 23:19:06,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:19:06,506 INFO L225 Difference]: With dead ends: 206 [2020-07-19 23:19:06,507 INFO L226 Difference]: Without dead ends: 115 [2020-07-19 23:19:06,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:19:06,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-07-19 23:19:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2020-07-19 23:19:06,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-19 23:19:06,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-07-19 23:19:06,525 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 14 [2020-07-19 23:19:06,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:19:06,525 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-07-19 23:19:06,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 23:19:06,525 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-07-19 23:19:06,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 23:19:06,526 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:19:06,526 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:19:06,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:19:06,527 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:19:06,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:19:06,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1684995551, now seen corresponding path program 1 times [2020-07-19 23:19:06,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:19:06,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045565845] [2020-07-19 23:19:06,528 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29a1a4a7 [2020-07-19 23:19:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:19:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:19:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:19:06,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045565845] [2020-07-19 23:19:06,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:19:06,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-19 23:19:06,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473076069] [2020-07-19 23:19:06,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 23:19:06,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:19:06,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 23:19:06,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:19:06,663 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 7 states. [2020-07-19 23:19:07,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:19:07,236 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2020-07-19 23:19:07,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 23:19:07,236 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-19 23:19:07,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:19:07,238 INFO L225 Difference]: With dead ends: 157 [2020-07-19 23:19:07,239 INFO L226 Difference]: Without dead ends: 152 [2020-07-19 23:19:07,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:19:07,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-19 23:19:07,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 108. [2020-07-19 23:19:07,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-19 23:19:07,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 131 transitions. [2020-07-19 23:19:07,253 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 131 transitions. Word has length 20 [2020-07-19 23:19:07,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:19:07,254 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 131 transitions. [2020-07-19 23:19:07,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 23:19:07,254 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 131 transitions. [2020-07-19 23:19:07,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-19 23:19:07,259 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:19:07,259 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] [2020-07-19 23:19:07,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-19 23:19:07,259 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:19:07,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:19:07,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1145945773, now seen corresponding path program 1 times [2020-07-19 23:19:07,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:19:07,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336770270] [2020-07-19 23:19:07,261 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29a1a4a7 [2020-07-19 23:19:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:19:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:19:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:19:07,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336770270] [2020-07-19 23:19:07,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:19:07,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-19 23:19:07,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186040705] [2020-07-19 23:19:07,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 23:19:07,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:19:07,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 23:19:07,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:19:07,352 INFO L87 Difference]: Start difference. First operand 108 states and 131 transitions. Second operand 6 states. [2020-07-19 23:19:07,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:19:07,771 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2020-07-19 23:19:07,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:19:07,771 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-07-19 23:19:07,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:19:07,773 INFO L225 Difference]: With dead ends: 116 [2020-07-19 23:19:07,773 INFO L226 Difference]: Without dead ends: 113 [2020-07-19 23:19:07,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:19:07,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-07-19 23:19:07,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2020-07-19 23:19:07,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-19 23:19:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2020-07-19 23:19:07,794 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 27 [2020-07-19 23:19:07,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:19:07,794 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2020-07-19 23:19:07,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 23:19:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2020-07-19 23:19:07,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-19 23:19:07,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:19:07,796 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] [2020-07-19 23:19:07,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-19 23:19:07,797 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:19:07,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:19:07,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1471361763, now seen corresponding path program 1 times [2020-07-19 23:19:07,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:19:07,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086415513] [2020-07-19 23:19:07,798 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29a1a4a7 [2020-07-19 23:19:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:19:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:19:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:19:07,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086415513] [2020-07-19 23:19:07,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:19:07,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-19 23:19:07,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869576216] [2020-07-19 23:19:07,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 23:19:07,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:19:07,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 23:19:07,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:19:07,961 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand 6 states. [2020-07-19 23:19:08,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:19:08,468 INFO L93 Difference]: Finished difference Result 115 states and 139 transitions. [2020-07-19 23:19:08,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:19:08,469 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-07-19 23:19:08,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:19:08,470 INFO L225 Difference]: With dead ends: 115 [2020-07-19 23:19:08,470 INFO L226 Difference]: Without dead ends: 112 [2020-07-19 23:19:08,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:19:08,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-19 23:19:08,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2020-07-19 23:19:08,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-19 23:19:08,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2020-07-19 23:19:08,481 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 27 [2020-07-19 23:19:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:19:08,482 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2020-07-19 23:19:08,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 23:19:08,482 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2020-07-19 23:19:08,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-19 23:19:08,483 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:19:08,483 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] [2020-07-19 23:19:08,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-19 23:19:08,483 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:19:08,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:19:08,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1648323131, now seen corresponding path program 1 times [2020-07-19 23:19:08,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:19:08,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123120653] [2020-07-19 23:19:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29a1a4a7 [2020-07-19 23:19:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:19:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:19:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:19:08,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123120653] [2020-07-19 23:19:08,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:19:08,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-19 23:19:08,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752349692] [2020-07-19 23:19:08,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:19:08,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:19:08,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:19:08,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:19:08,617 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand 8 states. [2020-07-19 23:19:09,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:19:09,173 INFO L93 Difference]: Finished difference Result 147 states and 177 transitions. [2020-07-19 23:19:09,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:19:09,177 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-07-19 23:19:09,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:19:09,178 INFO L225 Difference]: With dead ends: 147 [2020-07-19 23:19:09,178 INFO L226 Difference]: Without dead ends: 144 [2020-07-19 23:19:09,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:19:09,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-19 23:19:09,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2020-07-19 23:19:09,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-19 23:19:09,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2020-07-19 23:19:09,188 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 30 [2020-07-19 23:19:09,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:19:09,189 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2020-07-19 23:19:09,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:19:09,189 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2020-07-19 23:19:09,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-19 23:19:09,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:19:09,190 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] [2020-07-19 23:19:09,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-19 23:19:09,190 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:19:09,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:19:09,191 INFO L82 PathProgramCache]: Analyzing trace with hash 861386650, now seen corresponding path program 1 times [2020-07-19 23:19:09,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:19:09,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939511971] [2020-07-19 23:19:09,191 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29a1a4a7 [2020-07-19 23:19:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:19:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:19:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:19:09,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939511971] [2020-07-19 23:19:09,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:19:09,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-19 23:19:09,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613468640] [2020-07-19 23:19:09,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:19:09,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:19:09,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:19:09,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:19:09,263 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand 8 states. [2020-07-19 23:19:09,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:19:09,840 INFO L93 Difference]: Finished difference Result 146 states and 175 transitions. [2020-07-19 23:19:09,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:19:09,841 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-07-19 23:19:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:19:09,842 INFO L225 Difference]: With dead ends: 146 [2020-07-19 23:19:09,842 INFO L226 Difference]: Without dead ends: 143 [2020-07-19 23:19:09,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:19:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-07-19 23:19:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 118. [2020-07-19 23:19:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-07-19 23:19:09,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2020-07-19 23:19:09,857 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 30 [2020-07-19 23:19:09,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:19:09,858 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2020-07-19 23:19:09,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:19:09,858 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2020-07-19 23:19:09,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-19 23:19:09,859 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:19:09,859 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] [2020-07-19 23:19:09,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-19 23:19:09,860 INFO L427 AbstractCegarLoop]: === Iteration 8 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:19:09,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:19:09,860 INFO L82 PathProgramCache]: Analyzing trace with hash 671486784, now seen corresponding path program 1 times [2020-07-19 23:19:09,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:19:09,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98032038] [2020-07-19 23:19:09,861 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29a1a4a7 [2020-07-19 23:19:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:19:09,879 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:19:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:19:09,894 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:19:09,938 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-19 23:19:09,938 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 23:19:09,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-19 23:19:09,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:19:09 BoogieIcfgContainer [2020-07-19 23:19:09,982 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:19:09,985 INFO L168 Benchmark]: Toolchain (without parser) took 6199.10 ms. Allocated memory was 138.9 MB in the beginning and 281.0 MB in the end (delta: 142.1 MB). Free memory was 102.8 MB in the beginning and 120.9 MB in the end (delta: -18.2 MB). Peak memory consumption was 123.9 MB. Max. memory is 7.1 GB. [2020-07-19 23:19:09,986 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-19 23:19:09,986 INFO L168 Benchmark]: CACSL2BoogieTranslator took 660.15 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 102.5 MB in the beginning and 168.8 MB in the end (delta: -66.3 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2020-07-19 23:19:09,987 INFO L168 Benchmark]: Boogie Preprocessor took 85.70 ms. Allocated memory is still 203.9 MB. Free memory was 168.8 MB in the beginning and 164.9 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. [2020-07-19 23:19:09,988 INFO L168 Benchmark]: RCFGBuilder took 860.55 ms. Allocated memory is still 203.9 MB. Free memory was 164.9 MB in the beginning and 96.1 MB in the end (delta: 68.8 MB). Peak memory consumption was 68.8 MB. Max. memory is 7.1 GB. [2020-07-19 23:19:09,989 INFO L168 Benchmark]: TraceAbstraction took 4586.12 ms. Allocated memory was 203.9 MB in the beginning and 281.0 MB in the end (delta: 77.1 MB). Free memory was 95.4 MB in the beginning and 120.9 MB in the end (delta: -25.5 MB). Peak memory consumption was 51.6 MB. Max. memory is 7.1 GB. [2020-07-19 23:19:09,993 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 660.15 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 102.5 MB in the beginning and 168.8 MB in the end (delta: -66.3 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 85.70 ms. Allocated memory is still 203.9 MB. Free memory was 168.8 MB in the beginning and 164.9 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 860.55 ms. Allocated memory is still 203.9 MB. Free memory was 164.9 MB in the beginning and 96.1 MB in the end (delta: 68.8 MB). Peak memory consumption was 68.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4586.12 ms. Allocated memory was 203.9 MB in the beginning and 281.0 MB in the end (delta: 77.1 MB). Free memory was 95.4 MB in the beginning and 120.9 MB in the end (delta: -25.5 MB). Peak memory consumption was 51.6 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)={-1:0}, node={-1:0}] [L630] COND FALSE !(!node) VAL [data={0:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L632] node->next = node [L633] node->value = __VERIFIER_nondet_int() [L634] struct list *item = malloc(sizeof *item); VAL [data={0:0}, item={-2:0}, malloc(sizeof *item)={-2:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L635] COND FALSE !(!item) VAL [data={0:0}, item={-2:0}, malloc(sizeof *item)={-2:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L637] item->slist = node [L638] item->next = data [L639] data = item VAL [data={-2:0}, item={-2:0}, malloc(sizeof *item)={-2:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L628] COND FALSE !(__VERIFIER_nondet_int()) [L641] COND FALSE !(!data) VAL [data={-2:0}, item={-2:0}, malloc(sizeof *item)={-2:0}, malloc(sizeof *node)={-1:0}, node={-1:0}] [L643] CALL inspect_before(data) VAL [shape={-2:0}] [L604] COND FALSE !(!(shape)) VAL [shape={-2:0}, shape={-2:0}] [L605] shape->next VAL [shape={-2:0}, shape={-2:0}, shape->next={0:0}] [L605] COND FALSE !(shape->next) [L611] COND FALSE !(!(shape)) VAL [shape={-2:0}, shape={-2:0}] [L612] EXPR shape->next VAL [shape={-2:0}, shape={-2:0}, shape->next={0:0}] [L612] COND FALSE !(!(shape->next == ((void *)0))) [L613] EXPR shape->slist VAL [shape={-2:0}, shape={-2:0}, shape->slist={-1:0}] [L613] COND FALSE !(!(shape->slist)) [L614] EXPR shape->slist [L614] EXPR shape->slist->next VAL [shape={-2:0}, shape={-2:0}, shape->slist={-1:0}, shape->slist->next={-1:0}] [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: 4.4s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 793 SDtfs, 921 SDslu, 888 SDs, 0 SdLazy, 1951 SolverSat, 200 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred 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, 138 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 194 NumberOfCodeBlocks, 194 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 17008 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 10/10 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...