/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 BIGGEST_EQUIVALENCE_CLASS --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/list-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 05:48:36,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 05:48:36,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 05:48:36,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 05:48:36,703 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 05:48:36,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 05:48:36,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 05:48:36,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 05:48:36,710 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 05:48:36,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 05:48:36,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 05:48:36,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 05:48:36,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 05:48:36,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 05:48:36,715 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 05:48:36,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 05:48:36,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 05:48:36,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 05:48:36,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 05:48:36,722 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 05:48:36,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 05:48:36,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 05:48:36,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 05:48:36,728 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 05:48:36,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 05:48:36,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 05:48:36,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 05:48:36,736 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 05:48:36,736 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 05:48:36,737 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 05:48:36,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 05:48:36,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 05:48:36,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 05:48:36,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 05:48:36,748 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 05:48:36,749 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 05:48:36,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 05:48:36,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 05:48:36,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 05:48:36,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 05:48:36,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 05:48:36,754 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 05:48:36,778 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 05:48:36,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 05:48:36,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 05:48:36,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 05:48:36,781 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 05:48:36,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 05:48:36,782 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 05:48:36,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 05:48:36,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 05:48:36,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 05:48:36,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 05:48:36,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 05:48:36,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 05:48:36,784 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 05:48:36,784 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 05:48:36,785 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 05:48:36,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 05:48:36,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 05:48:36,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 05:48:36,785 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 05:48:36,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 05:48:36,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:48:36,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 05:48:36,786 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 05:48:36,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 05:48:36,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 05:48:36,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 05:48:36,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 05:48:36,787 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 05:48:36,787 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-20 05:48:37,079 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 05:48:37,094 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 05:48:37,098 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 05:48:37,099 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 05:48:37,099 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 05:48:37,100 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-20 05:48:37,170 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e98815fe/b47c952144404f2d9cc3ee42e3262fe5/FLAG77b23db2d [2020-07-20 05:48:37,745 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 05:48:37,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-20 05:48:37,760 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e98815fe/b47c952144404f2d9cc3ee42e3262fe5/FLAG77b23db2d [2020-07-20 05:48:37,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e98815fe/b47c952144404f2d9cc3ee42e3262fe5 [2020-07-20 05:48:38,005 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 05:48:38,008 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 05:48:38,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 05:48:38,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 05:48:38,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 05:48:38,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:48:37" (1/1) ... [2020-07-20 05:48:38,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65c96b68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:38, skipping insertion in model container [2020-07-20 05:48:38,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:48:37" (1/1) ... [2020-07-20 05:48:38,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 05:48:38,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 05:48:38,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:48:38,575 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 05:48:38,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:48:38,702 INFO L208 MainTranslator]: Completed translation [2020-07-20 05:48:38,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:38 WrapperNode [2020-07-20 05:48:38,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 05:48:38,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 05:48:38,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 05:48:38,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 05:48:38,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:38" (1/1) ... [2020-07-20 05:48:38,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:38" (1/1) ... [2020-07-20 05:48:38,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:38" (1/1) ... [2020-07-20 05:48:38,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:38" (1/1) ... [2020-07-20 05:48:38,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:38" (1/1) ... [2020-07-20 05:48:38,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:38" (1/1) ... [2020-07-20 05:48:38,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:38" (1/1) ... [2020-07-20 05:48:38,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 05:48:38,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 05:48:38,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 05:48:38,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 05:48:38,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:48:38,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 05:48:38,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 05:48:38,844 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 05:48:38,844 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 05:48:38,844 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-20 05:48:38,844 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-07-20 05:48:38,844 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 05:48:38,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 05:48:38,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 05:48:38,845 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 05:48:38,845 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 05:48:38,845 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 05:48:38,845 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 05:48:38,846 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 05:48:38,846 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 05:48:38,846 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 05:48:38,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 05:48:38,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 05:48:38,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 05:48:38,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 05:48:38,847 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 05:48:38,847 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 05:48:38,847 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 05:48:38,847 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 05:48:38,847 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 05:48:38,847 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 05:48:38,848 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 05:48:38,848 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 05:48:38,848 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 05:48:38,848 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 05:48:38,848 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 05:48:38,848 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 05:48:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 05:48:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 05:48:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 05:48:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 05:48:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 05:48:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 05:48:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 05:48:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 05:48:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 05:48:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 05:48:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 05:48:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 05:48:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 05:48:38,851 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 05:48:38,851 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 05:48:38,851 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 05:48:38,851 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 05:48:38,851 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 05:48:38,851 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 05:48:38,852 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 05:48:38,852 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 05:48:38,852 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 05:48:38,852 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 05:48:38,852 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 05:48:38,852 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 05:48:38,853 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 05:48:38,853 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 05:48:38,853 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 05:48:38,853 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 05:48:38,853 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 05:48:38,853 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 05:48:38,854 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 05:48:38,854 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 05:48:38,854 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 05:48:38,854 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 05:48:38,854 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 05:48:38,854 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 05:48:38,854 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 05:48:38,855 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 05:48:38,855 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 05:48:38,855 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 05:48:38,855 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 05:48:38,855 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 05:48:38,855 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 05:48:38,856 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 05:48:38,856 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 05:48:38,856 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 05:48:38,856 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 05:48:38,856 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 05:48:38,856 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 05:48:38,857 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 05:48:38,857 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 05:48:38,857 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 05:48:38,857 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 05:48:38,857 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 05:48:38,857 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 05:48:38,857 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 05:48:38,858 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 05:48:38,858 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 05:48:38,858 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 05:48:38,858 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 05:48:38,858 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 05:48:38,858 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 05:48:38,859 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 05:48:38,859 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 05:48:38,859 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 05:48:38,859 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 05:48:38,859 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 05:48:38,859 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 05:48:38,859 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 05:48:38,860 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 05:48:38,860 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 05:48:38,860 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 05:48:38,860 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 05:48:38,860 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 05:48:38,860 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 05:48:38,861 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 05:48:38,861 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 05:48:38,861 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 05:48:38,861 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 05:48:38,861 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 05:48:38,861 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 05:48:38,861 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-20 05:48:38,862 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-07-20 05:48:38,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 05:48:38,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 05:48:38,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 05:48:38,862 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 05:48:38,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 05:48:38,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 05:48:38,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 05:48:38,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 05:48:38,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 05:48:39,192 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-20 05:48:39,394 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 05:48:39,394 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 05:48:39,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:48:39 BoogieIcfgContainer [2020-07-20 05:48:39,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 05:48:39,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 05:48:39,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 05:48:39,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 05:48:39,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:48:37" (1/3) ... [2020-07-20 05:48:39,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41af49e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:48:39, skipping insertion in model container [2020-07-20 05:48:39,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:48:38" (2/3) ... [2020-07-20 05:48:39,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41af49e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:48:39, skipping insertion in model container [2020-07-20 05:48:39,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:48:39" (3/3) ... [2020-07-20 05:48:39,407 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-07-20 05:48:39,417 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 05:48:39,424 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 05:48:39,438 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 05:48:39,457 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 05:48:39,457 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 05:48:39,458 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 05:48:39,458 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 05:48:39,458 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 05:48:39,458 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 05:48:39,459 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 05:48:39,459 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 05:48:39,474 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-20 05:48:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 05:48:39,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:48:39,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:48:39,481 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:48:39,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:48:39,486 INFO L82 PathProgramCache]: Analyzing trace with hash 248267832, now seen corresponding path program 1 times [2020-07-20 05:48:39,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:48:39,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431249448] [2020-07-20 05:48:39,494 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@410e6d1b [2020-07-20 05:48:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:48:39,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431249448] [2020-07-20 05:48:39,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:48:39,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 05:48:39,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94855115] [2020-07-20 05:48:39,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 05:48:39,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:48:39,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 05:48:39,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 05:48:39,871 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 7 states. [2020-07-20 05:48:40,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:48:40,247 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-07-20 05:48:40,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 05:48:40,249 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-20 05:48:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:48:40,262 INFO L225 Difference]: With dead ends: 73 [2020-07-20 05:48:40,262 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 05:48:40,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 05:48:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 05:48:40,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-07-20 05:48:40,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 05:48:40,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-07-20 05:48:40,333 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2020-07-20 05:48:40,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:48:40,333 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-07-20 05:48:40,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 05:48:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-07-20 05:48:40,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 05:48:40,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:48:40,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:48:40,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 05:48:40,337 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:48:40,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:48:40,339 INFO L82 PathProgramCache]: Analyzing trace with hash 215856973, now seen corresponding path program 1 times [2020-07-20 05:48:40,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:48:40,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544279512] [2020-07-20 05:48:40,340 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@410e6d1b [2020-07-20 05:48:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:48:40,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544279512] [2020-07-20 05:48:40,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:48:40,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 05:48:40,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770885487] [2020-07-20 05:48:40,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 05:48:40,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:48:40,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 05:48:40,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 05:48:40,511 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 6 states. [2020-07-20 05:48:40,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:48:40,697 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2020-07-20 05:48:40,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 05:48:40,698 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-07-20 05:48:40,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:48:40,700 INFO L225 Difference]: With dead ends: 63 [2020-07-20 05:48:40,700 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 05:48:40,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-20 05:48:40,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 05:48:40,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-20 05:48:40,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 05:48:40,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-07-20 05:48:40,711 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 27 [2020-07-20 05:48:40,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:48:40,711 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-07-20 05:48:40,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 05:48:40,712 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-07-20 05:48:40,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 05:48:40,713 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:48:40,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:48:40,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 05:48:40,713 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:48:40,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:48:40,714 INFO L82 PathProgramCache]: Analyzing trace with hash -795260277, now seen corresponding path program 1 times [2020-07-20 05:48:40,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:48:40,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065312542] [2020-07-20 05:48:40,715 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@410e6d1b [2020-07-20 05:48:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:48:40,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065312542] [2020-07-20 05:48:40,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534807033] [2020-07-20 05:48:40,872 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@19acc460 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:48:41,107 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@19acc460 issued 3 check-sat command(s) [2020-07-20 05:48:41,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:48:41,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 05:48:41,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:48:41,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 05:48:41,213 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 18 treesize of output 19 [2020-07-20 05:48:41,214 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:48:41,226 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:48:41,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 05:48:41,234 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 18 treesize of output 19 [2020-07-20 05:48:41,234 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:48:41,244 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:48:41,245 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:48:41,245 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:37 [2020-07-20 05:48:41,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 05:48:41,451 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2020-07-20 05:48:41,452 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:48:41,461 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:48:41,467 INFO L350 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2020-07-20 05:48:41,467 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2020-07-20 05:48:41,468 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:48:41,473 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:48:41,474 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:48:41,474 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:55, output treesize:7 [2020-07-20 05:48:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:48:41,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:48:41,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2020-07-20 05:48:41,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244788413] [2020-07-20 05:48:41,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 05:48:41,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:48:41,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 05:48:41,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-07-20 05:48:41,506 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 15 states. [2020-07-20 05:48:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:48:42,154 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2020-07-20 05:48:42,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 05:48:42,155 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-07-20 05:48:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:48:42,157 INFO L225 Difference]: With dead ends: 65 [2020-07-20 05:48:42,158 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 05:48:42,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2020-07-20 05:48:42,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 05:48:42,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2020-07-20 05:48:42,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 05:48:42,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-07-20 05:48:42,167 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2020-07-20 05:48:42,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:48:42,167 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-07-20 05:48:42,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 05:48:42,167 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-07-20 05:48:42,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 05:48:42,169 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:48:42,169 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:48:42,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 05:48:42,379 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:48:42,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:48:42,380 INFO L82 PathProgramCache]: Analyzing trace with hash 260013466, now seen corresponding path program 1 times [2020-07-20 05:48:42,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:48:42,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60420685] [2020-07-20 05:48:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@410e6d1b [2020-07-20 05:48:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:48:42,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60420685] [2020-07-20 05:48:42,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981205351] [2020-07-20 05:48:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29c4bf72 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:48:43,452 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29c4bf72 issued 4 check-sat command(s) [2020-07-20 05:48:43,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:48:43,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 05:48:43,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:48:43,480 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 05:48:43,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 05:48:43,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 05:48:43,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2020-07-20 05:48:43,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083602745] [2020-07-20 05:48:43,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 05:48:43,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:48:43,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 05:48:43,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-20 05:48:43,498 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 4 states. [2020-07-20 05:48:43,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:48:43,541 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2020-07-20 05:48:43,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 05:48:43,543 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-07-20 05:48:43,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:48:43,544 INFO L225 Difference]: With dead ends: 57 [2020-07-20 05:48:43,544 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 05:48:43,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-07-20 05:48:43,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 05:48:43,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-07-20 05:48:43,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 05:48:43,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-07-20 05:48:43,559 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 34 [2020-07-20 05:48:43,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:48:43,560 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-07-20 05:48:43,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 05:48:43,561 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-07-20 05:48:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 05:48:43,562 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:48:43,562 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:48:43,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:48:43,763 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:48:43,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:48:43,763 INFO L82 PathProgramCache]: Analyzing trace with hash 260011544, now seen corresponding path program 1 times [2020-07-20 05:48:43,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:48:43,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038334656] [2020-07-20 05:48:43,765 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@410e6d1b [2020-07-20 05:48:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:48:43,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038334656] [2020-07-20 05:48:43,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887534428] [2020-07-20 05:48:43,886 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1f0536d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:48:44,421 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1f0536d issued 4 check-sat command(s) [2020-07-20 05:48:44,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:48:44,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 05:48:44,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:48:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:48:44,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:48:44,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2020-07-20 05:48:44,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954593842] [2020-07-20 05:48:44,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 05:48:44,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:48:44,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 05:48:44,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-20 05:48:44,453 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 10 states. [2020-07-20 05:48:44,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:48:44,675 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2020-07-20 05:48:44,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 05:48:44,675 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-07-20 05:48:44,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:48:44,677 INFO L225 Difference]: With dead ends: 76 [2020-07-20 05:48:44,677 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 05:48:44,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-20 05:48:44,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 05:48:44,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-07-20 05:48:44,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 05:48:44,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-07-20 05:48:44,693 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 34 [2020-07-20 05:48:44,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:48:44,694 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-07-20 05:48:44,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 05:48:44,695 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-07-20 05:48:44,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 05:48:44,696 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:48:44,696 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:48:44,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:48:44,910 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:48:44,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:48:44,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1408992297, now seen corresponding path program 2 times [2020-07-20 05:48:44,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:48:44,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911325337] [2020-07-20 05:48:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@410e6d1b [2020-07-20 05:48:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:45,109 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:48:45,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911325337] [2020-07-20 05:48:45,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013784630] [2020-07-20 05:48:45,110 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35606e8a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:49:41,006 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35606e8a issued 4 check-sat command(s) [2020-07-20 05:49:41,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:49:41,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 05:49:41,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:49:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:49:41,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:49:41,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2020-07-20 05:49:41,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155295137] [2020-07-20 05:49:41,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 05:49:41,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:49:41,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 05:49:41,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-20 05:49:41,366 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 11 states. [2020-07-20 05:49:41,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:49:41,564 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-07-20 05:49:41,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 05:49:41,565 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-20 05:49:41,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:49:41,566 INFO L225 Difference]: With dead ends: 83 [2020-07-20 05:49:41,566 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 05:49:41,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-07-20 05:49:41,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 05:49:41,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-20 05:49:41,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 05:49:41,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-07-20 05:49:41,574 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 41 [2020-07-20 05:49:41,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:49:41,574 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-07-20 05:49:41,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 05:49:41,575 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-07-20 05:49:41,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 05:49:41,576 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:49:41,576 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:49:41,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:49:41,777 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:49:41,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:49:41,777 INFO L82 PathProgramCache]: Analyzing trace with hash -2107133704, now seen corresponding path program 3 times [2020-07-20 05:49:41,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:49:41,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858930223] [2020-07-20 05:49:41,778 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@410e6d1b [2020-07-20 05:49:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:49:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:49:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:49:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:49:41,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858930223] [2020-07-20 05:49:41,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43213764] [2020-07-20 05:49:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ac835c8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true