/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-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 05:46:03,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 05:46:03,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 05:46:03,679 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 05:46:03,679 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 05:46:03,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 05:46:03,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 05:46:03,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 05:46:03,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 05:46:03,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 05:46:03,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 05:46:03,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 05:46:03,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 05:46:03,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 05:46:03,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 05:46:03,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 05:46:03,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 05:46:03,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 05:46:03,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 05:46:03,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 05:46:03,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 05:46:03,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 05:46:03,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 05:46:03,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 05:46:03,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 05:46:03,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 05:46:03,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 05:46:03,704 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 05:46:03,705 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 05:46:03,706 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 05:46:03,706 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 05:46:03,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 05:46:03,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 05:46:03,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 05:46:03,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 05:46:03,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 05:46:03,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 05:46:03,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 05:46:03,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 05:46:03,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 05:46:03,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 05:46:03,718 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 05:46:03,740 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 05:46:03,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 05:46:03,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 05:46:03,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 05:46:03,743 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 05:46:03,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 05:46:03,743 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 05:46:03,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 05:46:03,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 05:46:03,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 05:46:03,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 05:46:03,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 05:46:03,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 05:46:03,746 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 05:46:03,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 05:46:03,746 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 05:46:03,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 05:46:03,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 05:46:03,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 05:46:03,747 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 05:46:03,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 05:46:03,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:46:03,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 05:46:03,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 05:46:03,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 05:46:03,748 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 05:46:03,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 05:46:03,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 05:46:03,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 05:46:03,749 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 05:46:04,029 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 05:46:04,042 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 05:46:04,046 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 05:46:04,047 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 05:46:04,047 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 05:46:04,048 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-07-20 05:46:04,108 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8df241d4/55e01425e6a6412c8ef485d2ba7a1138/FLAG9a4499494 [2020-07-20 05:46:04,637 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 05:46:04,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list-2.i [2020-07-20 05:46:04,657 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8df241d4/55e01425e6a6412c8ef485d2ba7a1138/FLAG9a4499494 [2020-07-20 05:46:04,947 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8df241d4/55e01425e6a6412c8ef485d2ba7a1138 [2020-07-20 05:46:04,956 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 05:46:04,959 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 05:46:04,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 05:46:04,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 05:46:04,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 05:46:04,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:46:04" (1/1) ... [2020-07-20 05:46:04,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f1ac836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:04, skipping insertion in model container [2020-07-20 05:46:04,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:46:04" (1/1) ... [2020-07-20 05:46:04,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 05:46:05,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 05:46:05,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:46:05,480 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 05:46:05,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:46:05,619 INFO L208 MainTranslator]: Completed translation [2020-07-20 05:46:05,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:05 WrapperNode [2020-07-20 05:46:05,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 05:46:05,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 05:46:05,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 05:46:05,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 05:46:05,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:05" (1/1) ... [2020-07-20 05:46:05,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:05" (1/1) ... [2020-07-20 05:46:05,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:05" (1/1) ... [2020-07-20 05:46:05,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:05" (1/1) ... [2020-07-20 05:46:05,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:05" (1/1) ... [2020-07-20 05:46:05,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:05" (1/1) ... [2020-07-20 05:46:05,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:05" (1/1) ... [2020-07-20 05:46:05,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 05:46:05,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 05:46:05,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 05:46:05,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 05:46:05,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:05" (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 05:46:05,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 05:46:05,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 05:46:05,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 05:46:05,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 05:46:05,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-20 05:46:05,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-20 05:46:05,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-20 05:46:05,751 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-20 05:46:05,751 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 05:46:05,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 05:46:05,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 05:46:05,753 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 05:46:05,753 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 05:46:05,753 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 05:46:05,753 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 05:46:05,754 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 05:46:05,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 05:46:05,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 05:46:05,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 05:46:05,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 05:46:05,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 05:46:05,756 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 05:46:05,756 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 05:46:05,757 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 05:46:05,757 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 05:46:05,759 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 05:46:05,759 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 05:46:05,759 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 05:46:05,759 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 05:46:05,759 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-20 05:46:05,760 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-20 05:46:05,760 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-20 05:46:05,760 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 05:46:05,760 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 05:46:05,760 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 05:46:05,760 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 05:46:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 05:46:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 05:46:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 05:46:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 05:46:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 05:46:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 05:46:05,762 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 05:46:05,762 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 05:46:05,762 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 05:46:05,762 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 05:46:05,762 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 05:46:05,762 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 05:46:05,763 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 05:46:05,763 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 05:46:05,763 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 05:46:05,763 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 05:46:05,763 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 05:46:05,763 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 05:46:05,763 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 05:46:05,764 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 05:46:05,764 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 05:46:05,764 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 05:46:05,764 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 05:46:05,765 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 05:46:05,765 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 05:46:05,765 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 05:46:05,765 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 05:46:05,766 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 05:46:05,766 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 05:46:05,766 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 05:46:05,766 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 05:46:05,767 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 05:46:05,767 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 05:46:05,767 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 05:46:05,768 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 05:46:05,768 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 05:46:05,768 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 05:46:05,769 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 05:46:05,769 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 05:46:05,769 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 05:46:05,769 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 05:46:05,770 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 05:46:05,770 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 05:46:05,770 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 05:46:05,770 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 05:46:05,770 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 05:46:05,770 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 05:46:05,770 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 05:46:05,771 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 05:46:05,771 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 05:46:05,771 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 05:46:05,771 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 05:46:05,771 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 05:46:05,771 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 05:46:05,771 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 05:46:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 05:46:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 05:46:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 05:46:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 05:46:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 05:46:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 05:46:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 05:46:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 05:46:05,773 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 05:46:05,773 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 05:46:05,773 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 05:46:05,773 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 05:46:05,773 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 05:46:05,773 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 05:46:05,773 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 05:46:05,773 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 05:46:05,773 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 05:46:05,773 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 05:46:05,774 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 05:46:05,774 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 05:46:05,774 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 05:46:05,774 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 05:46:05,774 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 05:46:05,774 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 05:46:05,774 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 05:46:05,774 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 05:46:05,774 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 05:46:05,775 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-20 05:46:05,775 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 05:46:05,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 05:46:05,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 05:46:05,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 05:46:05,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 05:46:05,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 05:46:05,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 05:46:05,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 05:46:05,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 05:46:06,085 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-20 05:46:06,321 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 05:46:06,322 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 05:46:06,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:46:06 BoogieIcfgContainer [2020-07-20 05:46:06,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 05:46:06,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 05:46:06,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 05:46:06,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 05:46:06,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:46:04" (1/3) ... [2020-07-20 05:46:06,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79f1e671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:46:06, skipping insertion in model container [2020-07-20 05:46:06,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:05" (2/3) ... [2020-07-20 05:46:06,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79f1e671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:46:06, skipping insertion in model container [2020-07-20 05:46:06,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:46:06" (3/3) ... [2020-07-20 05:46:06,334 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-07-20 05:46:06,343 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 05:46:06,350 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 05:46:06,361 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 05:46:06,378 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 05:46:06,378 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 05:46:06,379 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 05:46:06,379 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 05:46:06,379 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 05:46:06,379 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 05:46:06,380 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 05:46:06,380 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 05:46:06,398 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-20 05:46:06,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 05:46:06,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:06,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:46:06,406 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:06,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:06,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1613857984, now seen corresponding path program 1 times [2020-07-20 05:46:06,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:06,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445731399] [2020-07-20 05:46:06,422 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30a57d18 [2020-07-20 05:46:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:06,590 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 05:46:06,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445731399] [2020-07-20 05:46:06,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:06,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:06,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341457148] [2020-07-20 05:46:06,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:06,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:06,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:06,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:06,611 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-07-20 05:46:06,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:06,721 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-07-20 05:46:06,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:06,723 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-20 05:46:06,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:06,731 INFO L225 Difference]: With dead ends: 56 [2020-07-20 05:46:06,732 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 05:46:06,735 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 [2020-07-20 05:46:06,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 05:46:06,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 05:46:06,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 05:46:06,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-20 05:46:06,777 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-07-20 05:46:06,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:06,777 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-20 05:46:06,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:06,778 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-20 05:46:06,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 05:46:06,779 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:06,779 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 05:46:06,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 05:46:06,779 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:06,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:06,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1642379272, now seen corresponding path program 1 times [2020-07-20 05:46:06,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:06,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121648285] [2020-07-20 05:46:06,781 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30a57d18 [2020-07-20 05:46:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:06,958 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 05:46:06,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121648285] [2020-07-20 05:46:06,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:06,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 05:46:06,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643253457] [2020-07-20 05:46:06,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 05:46:06,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:06,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 05:46:06,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 05:46:06,964 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-07-20 05:46:07,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:07,137 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-07-20 05:46:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 05:46:07,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-20 05:46:07,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:07,141 INFO L225 Difference]: With dead ends: 50 [2020-07-20 05:46:07,141 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 05:46:07,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 05:46:07,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 05:46:07,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2020-07-20 05:46:07,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 05:46:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-07-20 05:46:07,152 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 20 [2020-07-20 05:46:07,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:07,152 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-07-20 05:46:07,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 05:46:07,152 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-07-20 05:46:07,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 05:46:07,153 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:07,153 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] [2020-07-20 05:46:07,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 05:46:07,154 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:07,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:07,154 INFO L82 PathProgramCache]: Analyzing trace with hash -2024806125, now seen corresponding path program 1 times [2020-07-20 05:46:07,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:07,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850235844] [2020-07-20 05:46:07,155 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30a57d18 [2020-07-20 05:46:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:07,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850235844] [2020-07-20 05:46:07,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:07,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 05:46:07,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649178583] [2020-07-20 05:46:07,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 05:46:07,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:07,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 05:46:07,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 05:46:07,253 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2020-07-20 05:46:07,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:07,406 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-20 05:46:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 05:46:07,407 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-07-20 05:46:07,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:07,408 INFO L225 Difference]: With dead ends: 52 [2020-07-20 05:46:07,409 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 05:46:07,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 05:46:07,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 05:46:07,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-07-20 05:46:07,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 05:46:07,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-07-20 05:46:07,419 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-07-20 05:46:07,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:07,424 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-07-20 05:46:07,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 05:46:07,424 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-07-20 05:46:07,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 05:46:07,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:07,425 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] [2020-07-20 05:46:07,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 05:46:07,431 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:07,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:07,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1000103149, now seen corresponding path program 1 times [2020-07-20 05:46:07,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:07,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450520218] [2020-07-20 05:46:07,432 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30a57d18 [2020-07-20 05:46:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:07,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450520218] [2020-07-20 05:46:07,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:07,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 05:46:07,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535213616] [2020-07-20 05:46:07,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 05:46:07,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:07,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 05:46:07,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 05:46:07,558 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 6 states. [2020-07-20 05:46:07,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:07,691 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-20 05:46:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 05:46:07,693 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-07-20 05:46:07,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:07,694 INFO L225 Difference]: With dead ends: 52 [2020-07-20 05:46:07,696 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 05:46:07,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 05:46:07,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 05:46:07,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-07-20 05:46:07,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 05:46:07,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-20 05:46:07,704 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-07-20 05:46:07,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:07,704 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-20 05:46:07,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 05:46:07,704 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-20 05:46:07,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 05:46:07,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:07,706 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] [2020-07-20 05:46:07,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 05:46:07,707 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:07,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:07,707 INFO L82 PathProgramCache]: Analyzing trace with hash 422878047, now seen corresponding path program 1 times [2020-07-20 05:46:07,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:07,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378118426] [2020-07-20 05:46:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30a57d18 [2020-07-20 05:46:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:07,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378118426] [2020-07-20 05:46:07,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494370600] [2020-07-20 05:46:07,907 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2c3bb0de No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:46:08,077 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2c3bb0de issued 3 check-sat command(s) [2020-07-20 05:46:08,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:46:08,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 05:46:08,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:46:08,153 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 05:46:08,154 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:08,158 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:08,159 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:08,159 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 05:46:08,225 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:08,226 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-20 05:46:08,227 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:08,238 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:08,246 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 05:46:08,247 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:08,256 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:08,257 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:08,257 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:18 [2020-07-20 05:46:08,281 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-20 05:46:08,282 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2020-07-20 05:46:08,282 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:08,287 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:08,288 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:08,288 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:12 [2020-07-20 05:46:08,299 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-07-20 05:46:08,300 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:08,313 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:08,315 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 05:46:08,316 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:19 [2020-07-20 05:46:08,348 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 22 treesize of output 10 [2020-07-20 05:46:08,349 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:08,354 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:08,355 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:08,355 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:26, output treesize:3 [2020-07-20 05:46:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:08,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:46:08,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-07-20 05:46:08,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56480090] [2020-07-20 05:46:08,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 05:46:08,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:08,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 05:46:08,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-07-20 05:46:08,361 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 10 states. [2020-07-20 05:46:08,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:08,638 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-20 05:46:08,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 05:46:08,641 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-07-20 05:46:08,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:08,642 INFO L225 Difference]: With dead ends: 54 [2020-07-20 05:46:08,642 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 05:46:08,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-07-20 05:46:08,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 05:46:08,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-20 05:46:08,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 05:46:08,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-20 05:46:08,652 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 24 [2020-07-20 05:46:08,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:08,653 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-20 05:46:08,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 05:46:08,653 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-20 05:46:08,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 05:46:08,655 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:08,655 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] [2020-07-20 05:46:08,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:46:08,857 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:08,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:08,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1286279711, now seen corresponding path program 1 times [2020-07-20 05:46:08,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:08,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172095408] [2020-07-20 05:46:08,859 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30a57d18 [2020-07-20 05:46:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:08,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172095408] [2020-07-20 05:46:08,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813751214] [2020-07-20 05:46:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@459da4fa 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 05:46:09,084 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@459da4fa issued 3 check-sat command(s) [2020-07-20 05:46:09,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:46:09,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 05:46:09,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:46:09,095 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 05:46:09,096 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:09,100 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:09,101 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:09,101 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 05:46:09,146 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:09,147 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-20 05:46:09,148 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:09,158 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:09,163 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 05:46:09,163 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:09,172 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:09,172 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:09,173 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2020-07-20 05:46:09,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 05:46:09,204 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-07-20 05:46:09,204 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:09,211 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:09,211 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:09,211 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:15 [2020-07-20 05:46:09,237 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-07-20 05:46:09,238 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:09,246 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:09,247 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 05:46:09,248 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:22 [2020-07-20 05:46:09,283 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 22 treesize of output 10 [2020-07-20 05:46:09,284 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:09,288 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:09,289 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:09,289 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-07-20 05:46:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:09,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:46:09,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-07-20 05:46:09,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532427456] [2020-07-20 05:46:09,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 05:46:09,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:09,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 05:46:09,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-07-20 05:46:09,308 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 14 states. [2020-07-20 05:46:09,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:09,690 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-07-20 05:46:09,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 05:46:09,691 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-07-20 05:46:09,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:09,692 INFO L225 Difference]: With dead ends: 63 [2020-07-20 05:46:09,692 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 05:46:09,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-07-20 05:46:09,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 05:46:09,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2020-07-20 05:46:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 05:46:09,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-07-20 05:46:09,700 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 24 [2020-07-20 05:46:09,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:09,700 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-07-20 05:46:09,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 05:46:09,700 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-07-20 05:46:09,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 05:46:09,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:09,701 INFO L422 BasicCegarLoop]: trace histogram [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 05:46:09,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:46:09,917 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:09,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:09,917 INFO L82 PathProgramCache]: Analyzing trace with hash -562710342, now seen corresponding path program 1 times [2020-07-20 05:46:09,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:09,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821889092] [2020-07-20 05:46:09,918 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30a57d18 [2020-07-20 05:46:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:10,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821889092] [2020-07-20 05:46:10,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523337788] [2020-07-20 05:46:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c2c2d4a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:46:10,190 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c2c2d4a issued 3 check-sat command(s) [2020-07-20 05:46:10,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:46:10,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 05:46:10,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:46:10,199 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 05:46:10,200 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:10,202 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:10,202 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:10,202 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 05:46:10,241 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:10,242 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-20 05:46:10,243 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 05:46:10,246 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:10,251 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:10,252 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:10,252 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:11 [2020-07-20 05:46:10,279 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 05:46:10,279 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:10,290 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:10,294 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 05:46:10,295 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:10,304 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:10,305 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 05:46:10,306 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:49, output treesize:29 [2020-07-20 05:46:10,331 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_int_22|], 2=[|v_#memory_$Pointer$.base_18|, |v_#memory_$Pointer$.offset_16|]} [2020-07-20 05:46:10,336 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 29 treesize of output 19 [2020-07-20 05:46:10,336 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:10,347 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:10,399 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:10,400 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 132 [2020-07-20 05:46:10,402 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2020-07-20 05:46:10,403 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 05:46:10,404 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:10,423 INFO L624 ElimStorePlain]: treesize reduction 48, result has 61.0 percent of original size [2020-07-20 05:46:10,427 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 49 [2020-07-20 05:46:10,428 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:10,440 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:10,440 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:10,441 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:130, output treesize:30 [2020-07-20 05:46:10,469 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2020-07-20 05:46:10,470 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:10,477 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:10,480 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2020-07-20 05:46:10,481 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:10,486 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:10,487 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 05:46:10,487 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:48, output treesize:7 [2020-07-20 05:46:10,492 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 05:46:10,492 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:10,495 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:10,495 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:10,495 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-20 05:46:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:10,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:46:10,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-07-20 05:46:10,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778621500] [2020-07-20 05:46:10,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 05:46:10,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:10,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 05:46:10,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-07-20 05:46:10,500 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 15 states. [2020-07-20 05:46:10,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:10,866 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-07-20 05:46:10,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 05:46:10,866 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-07-20 05:46:10,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:10,867 INFO L225 Difference]: With dead ends: 67 [2020-07-20 05:46:10,867 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 05:46:10,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-07-20 05:46:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 05:46:10,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-07-20 05:46:10,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 05:46:10,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-07-20 05:46:10,874 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 26 [2020-07-20 05:46:10,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:10,875 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-07-20 05:46:10,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 05:46:10,875 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-07-20 05:46:10,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 05:46:10,876 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:10,876 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:46:11,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:46:11,084 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:11,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:11,085 INFO L82 PathProgramCache]: Analyzing trace with hash 449917269, now seen corresponding path program 1 times [2020-07-20 05:46:11,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:11,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551383873] [2020-07-20 05:46:11,087 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30a57d18 [2020-07-20 05:46:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:11,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551383873] [2020-07-20 05:46:11,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594957843] [2020-07-20 05:46:11,219 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35dd6e5f 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 05:46:11,328 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35dd6e5f issued 3 check-sat command(s) [2020-07-20 05:46:11,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:46:11,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-20 05:46:11,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:46:11,342 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 05:46:11,342 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:11,348 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:11,348 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:11,348 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 05:46:11,387 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:11,387 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-20 05:46:11,388 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:11,395 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:11,396 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:11,396 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2020-07-20 05:46:11,425 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 05:46:11,425 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:11,436 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:11,441 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 05:46:11,442 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:11,453 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:11,454 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:11,454 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:49, output treesize:38 [2020-07-20 05:46:11,487 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_int_23|], 2=[|v_#memory_$Pointer$.offset_18|, |v_#memory_$Pointer$.base_20|]} [2020-07-20 05:46:11,492 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 29 treesize of output 19 [2020-07-20 05:46:11,493 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:11,506 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:11,510 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 85 [2020-07-20 05:46:11,511 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:11,520 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:11,542 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:11,542 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 69 [2020-07-20 05:46:11,544 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 3, 2, 1] term [2020-07-20 05:46:11,544 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 05:46:11,545 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:11,560 INFO L624 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2020-07-20 05:46:11,561 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:11,561 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:139, output treesize:33 [2020-07-20 05:46:11,592 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2020-07-20 05:46:11,593 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:11,600 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:11,604 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-07-20 05:46:11,605 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:11,616 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:11,616 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 05:46:11,617 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:51, output treesize:11 [2020-07-20 05:46:11,656 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 05:46:11,657 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:11,659 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:11,660 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:11,674 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-07-20 05:46:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:11,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:46:11,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2020-07-20 05:46:11,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166075107] [2020-07-20 05:46:11,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 05:46:11,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:11,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 05:46:11,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-07-20 05:46:11,701 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 17 states. [2020-07-20 05:46:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:12,170 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-07-20 05:46:12,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 05:46:12,170 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-07-20 05:46:12,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:12,171 INFO L225 Difference]: With dead ends: 69 [2020-07-20 05:46:12,171 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 05:46:12,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-07-20 05:46:12,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 05:46:12,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-07-20 05:46:12,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 05:46:12,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-07-20 05:46:12,177 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 28 [2020-07-20 05:46:12,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:12,178 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-07-20 05:46:12,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 05:46:12,178 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-07-20 05:46:12,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 05:46:12,179 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:12,179 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 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 05:46:12,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:46:12,391 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:12,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:12,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1474620245, now seen corresponding path program 2 times [2020-07-20 05:46:12,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:12,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026875751] [2020-07-20 05:46:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30a57d18 [2020-07-20 05:46:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:12,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026875751] [2020-07-20 05:46:12,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571183080] [2020-07-20 05:46:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5a3edc9f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:46:12,618 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5a3edc9f issued 3 check-sat command(s) [2020-07-20 05:46:12,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:46:12,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-20 05:46:12,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:46:12,632 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 05:46:12,632 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:12,636 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:12,636 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:12,636 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 05:46:12,657 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:12,658 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-20 05:46:12,658 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:12,666 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:12,667 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:12,667 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:17 [2020-07-20 05:46:12,697 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 05:46:12,697 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:12,707 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:12,711 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 05:46:12,712 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:12,721 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:12,722 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:12,722 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:44, output treesize:33 [2020-07-20 05:46:12,748 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_int_24|], 2=[|v_#memory_$Pointer$.base_22|, |v_#memory_$Pointer$.offset_20|]} [2020-07-20 05:46:12,752 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 23 treesize of output 15 [2020-07-20 05:46:12,752 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:12,766 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:12,769 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 68 [2020-07-20 05:46:12,770 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:12,779 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:12,782 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 44 [2020-07-20 05:46:12,783 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:12,790 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:12,790 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:12,791 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:112, output treesize:30 [2020-07-20 05:46:12,820 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-07-20 05:46:12,821 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:12,827 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:12,831 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 05:46:12,831 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:12,835 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:12,835 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:12,836 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:11 [2020-07-20 05:46:12,870 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 05:46:12,871 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:12,872 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:12,873 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:12,873 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-07-20 05:46:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:12,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:46:12,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-07-20 05:46:12,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073543047] [2020-07-20 05:46:12,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 05:46:12,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:12,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 05:46:12,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-07-20 05:46:12,894 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 15 states. [2020-07-20 05:46:13,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:13,223 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-07-20 05:46:13,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 05:46:13,223 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-07-20 05:46:13,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:13,224 INFO L225 Difference]: With dead ends: 62 [2020-07-20 05:46:13,224 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 05:46:13,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-07-20 05:46:13,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 05:46:13,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-07-20 05:46:13,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 05:46:13,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-07-20 05:46:13,230 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 28 [2020-07-20 05:46:13,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:13,230 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-07-20 05:46:13,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 05:46:13,230 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-07-20 05:46:13,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 05:46:13,231 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:13,231 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:46:13,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:46:13,438 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:13,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:13,439 INFO L82 PathProgramCache]: Analyzing trace with hash -149429434, now seen corresponding path program 2 times [2020-07-20 05:46:13,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:13,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992387256] [2020-07-20 05:46:13,440 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30a57d18 [2020-07-20 05:46:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:13,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992387256] [2020-07-20 05:46:13,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163492996] [2020-07-20 05:46:13,592 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c21a079 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:46:13,737 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c21a079 issued 3 check-sat command(s) [2020-07-20 05:46:13,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:46:13,739 WARN L261 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 53 conjunts are in the unsatisfiable core [2020-07-20 05:46:13,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:46:13,746 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 05:46:13,747 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:13,750 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:13,750 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:13,751 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 05:46:13,779 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:13,779 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-07-20 05:46:13,780 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:13,812 INFO L624 ElimStorePlain]: treesize reduction 14, result has 73.1 percent of original size [2020-07-20 05:46:13,816 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 05:46:13,817 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:13,829 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:13,830 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 05:46:13,831 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:34 [2020-07-20 05:46:13,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 05:46:13,871 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-07-20 05:46:13,871 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:13,881 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:13,882 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 05:46:13,882 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:28 [2020-07-20 05:46:13,933 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:13,933 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-07-20 05:46:13,934 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:13,948 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:13,960 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:13,961 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 34 [2020-07-20 05:46:13,961 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:13,991 INFO L624 ElimStorePlain]: treesize reduction 16, result has 69.2 percent of original size [2020-07-20 05:46:13,992 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:13,992 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:47, output treesize:28 [2020-07-20 05:46:14,028 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:14,028 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2020-07-20 05:46:14,029 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:14,046 INFO L624 ElimStorePlain]: treesize reduction 12, result has 67.6 percent of original size [2020-07-20 05:46:14,047 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 05:46:14,047 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2020-07-20 05:46:14,096 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-07-20 05:46:14,097 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:14,107 INFO L624 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2020-07-20 05:46:14,108 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 05:46:14,108 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2020-07-20 05:46:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:14,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:46:14,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2020-07-20 05:46:14,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29643987] [2020-07-20 05:46:14,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 05:46:14,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:14,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 05:46:14,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-07-20 05:46:14,180 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 19 states. [2020-07-20 05:46:14,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:14,614 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-07-20 05:46:14,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 05:46:14,614 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-07-20 05:46:14,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:14,615 INFO L225 Difference]: With dead ends: 60 [2020-07-20 05:46:14,615 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 05:46:14,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2020-07-20 05:46:14,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 05:46:14,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-07-20 05:46:14,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 05:46:14,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-07-20 05:46:14,621 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 28 [2020-07-20 05:46:14,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:14,621 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-07-20 05:46:14,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 05:46:14,622 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-07-20 05:46:14,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 05:46:14,623 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:14,623 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:46:14,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:46:14,835 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:14,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:14,835 INFO L82 PathProgramCache]: Analyzing trace with hash 150272518, now seen corresponding path program 1 times [2020-07-20 05:46:14,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:14,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450855458] [2020-07-20 05:46:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30a57d18 [2020-07-20 05:46:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:14,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450855458] [2020-07-20 05:46:14,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51156312] [2020-07-20 05:46:14,991 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d7162d3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:46:15,119 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d7162d3 issued 3 check-sat command(s) [2020-07-20 05:46:15,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:46:15,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-20 05:46:15,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:46:15,129 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 05:46:15,129 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:15,136 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:15,136 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:15,137 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 05:46:15,158 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:15,158 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-07-20 05:46:15,159 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:15,193 INFO L624 ElimStorePlain]: treesize reduction 14, result has 71.4 percent of original size [2020-07-20 05:46:15,197 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 05:46:15,197 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:15,208 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:15,209 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:15,209 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:31 [2020-07-20 05:46:15,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 05:46:15,254 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-07-20 05:46:15,255 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:15,262 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:15,263 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:15,263 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:25 [2020-07-20 05:46:15,300 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:15,300 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-07-20 05:46:15,301 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:15,311 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:15,315 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-07-20 05:46:15,315 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:15,324 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:15,325 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:15,325 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2020-07-20 05:46:15,356 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 1] term [2020-07-20 05:46:15,357 INFO L501 QuantifierPusher]: Distributing 1 conjuncts over 3 disjuncts [2020-07-20 05:46:15,380 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-20 05:46:15,380 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2020-07-20 05:46:15,381 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:15,388 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:15,390 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 05:46:15,390 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:30 [2020-07-20 05:46:15,439 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2020-07-20 05:46:15,440 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:15,452 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:15,454 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-20 05:46:15,455 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:37 [2020-07-20 05:46:15,505 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-07-20 05:46:15,506 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:15,511 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:15,512 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:15,512 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:41, output treesize:3 [2020-07-20 05:46:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:15,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:46:15,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2020-07-20 05:46:15,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423307497] [2020-07-20 05:46:15,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 05:46:15,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:15,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 05:46:15,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-07-20 05:46:15,534 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 19 states. [2020-07-20 05:46:16,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:16,212 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-07-20 05:46:16,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 05:46:16,213 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-07-20 05:46:16,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:16,214 INFO L225 Difference]: With dead ends: 84 [2020-07-20 05:46:16,214 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 05:46:16,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2020-07-20 05:46:16,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 05:46:16,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-07-20 05:46:16,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 05:46:16,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-07-20 05:46:16,224 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 28 [2020-07-20 05:46:16,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:16,225 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-07-20 05:46:16,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 05:46:16,225 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-07-20 05:46:16,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 05:46:16,226 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:16,226 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:46:16,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:46:16,443 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:16,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:16,443 INFO L82 PathProgramCache]: Analyzing trace with hash -794385695, now seen corresponding path program 3 times [2020-07-20 05:46:16,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:16,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096268673] [2020-07-20 05:46:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30a57d18 [2020-07-20 05:46:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:16,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096268673] [2020-07-20 05:46:16,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426669310] [2020-07-20 05:46:16,724 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e59f8f9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:46:16,894 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e59f8f9 issued 3 check-sat command(s) [2020-07-20 05:46:16,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:46:16,897 WARN L261 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-20 05:46:16,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:46:16,906 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 05:46:16,906 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:16,909 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:16,910 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:16,910 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 05:46:16,938 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:16,938 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-07-20 05:46:16,939 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:16,977 INFO L624 ElimStorePlain]: treesize reduction 14, result has 65.9 percent of original size [2020-07-20 05:46:16,977 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:16,978 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:27 [2020-07-20 05:46:17,030 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 05:46:17,030 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:17,048 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:17,055 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 05:46:17,055 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:17,074 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:17,075 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:17,076 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:54, output treesize:47 [2020-07-20 05:46:17,137 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:17,138 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 30 [2020-07-20 05:46:17,138 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:17,168 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:17,169 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_int_35|], 2=[|v_#memory_$Pointer$.base_27|, |v_#memory_$Pointer$.offset_24|]} [2020-07-20 05:46:17,175 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 05:46:17,176 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:17,205 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:17,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 05:46:17,213 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2020-07-20 05:46:17,214 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:17,233 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:17,238 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2020-07-20 05:46:17,238 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:17,255 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:17,255 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:17,255 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:96, output treesize:43 [2020-07-20 05:46:17,328 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 05:46:17,338 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:17,338 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 129 [2020-07-20 05:46:17,340 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[10, 2, 1] term [2020-07-20 05:46:17,340 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-07-20 05:46:17,341 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:17,399 INFO L624 ElimStorePlain]: treesize reduction 24, result has 86.4 percent of original size [2020-07-20 05:46:17,418 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:17,419 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 140 [2020-07-20 05:46:17,420 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:17,465 INFO L624 ElimStorePlain]: treesize reduction 24, result has 81.4 percent of original size [2020-07-20 05:46:17,475 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2020-07-20 05:46:17,475 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:17,491 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:17,492 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:17,492 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:169, output treesize:83 [2020-07-20 05:46:17,538 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_37|], 5=[|v_#memory_$Pointer$.offset_26|, |v_#memory_$Pointer$.base_29|]} [2020-07-20 05:46:17,542 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 38 [2020-07-20 05:46:17,543 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:17,590 INFO L624 ElimStorePlain]: treesize reduction 16, result has 91.8 percent of original size [2020-07-20 05:46:17,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 05:46:17,610 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:17,611 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 173 [2020-07-20 05:46:17,612 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:17,627 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:17,633 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:17,634 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 65 [2020-07-20 05:46:17,635 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:17,657 INFO L624 ElimStorePlain]: treesize reduction 24, result has 71.4 percent of original size [2020-07-20 05:46:17,657 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 05:46:17,658 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:206, output treesize:60 [2020-07-20 05:46:17,746 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:17,747 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 40 [2020-07-20 05:46:17,748 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 05:46:17,749 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 05:46:17,750 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 05:46:17,778 INFO L624 ElimStorePlain]: treesize reduction 8, result has 85.5 percent of original size [2020-07-20 05:46:17,781 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 22 treesize of output 10 [2020-07-20 05:46:17,781 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 05:46:17,791 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 05:46:17,792 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 05:46:17,793 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:78, output treesize:29 [2020-07-20 05:46:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:17,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:46:17,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2020-07-20 05:46:17,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309725949] [2020-07-20 05:46:17,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 05:46:17,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:17,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 05:46:17,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-07-20 05:46:17,892 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 21 states. [2020-07-20 05:46:18,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:18,489 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2020-07-20 05:46:18,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 05:46:18,489 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-07-20 05:46:18,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:18,491 INFO L225 Difference]: With dead ends: 99 [2020-07-20 05:46:18,491 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 05:46:18,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2020-07-20 05:46:18,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 05:46:18,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-07-20 05:46:18,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-20 05:46:18,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-07-20 05:46:18,499 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 30 [2020-07-20 05:46:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:18,499 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-07-20 05:46:18,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 05:46:18,500 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-07-20 05:46:18,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 05:46:18,501 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:18,501 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:46:18,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-20 05:46:18,717 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:18,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:18,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1568321631, now seen corresponding path program 1 times [2020-07-20 05:46:18,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:18,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877099239] [2020-07-20 05:46:18,719 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30a57d18 [2020-07-20 05:46:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 05:46:18,739 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 05:46:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 05:46:18,759 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 05:46:18,797 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 05:46:18,797 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 05:46:18,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 05:46:18,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:46:18 BoogieIcfgContainer [2020-07-20 05:46:18,866 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 05:46:18,867 INFO L168 Benchmark]: Toolchain (without parser) took 13909.97 ms. Allocated memory was 138.4 MB in the beginning and 344.5 MB in the end (delta: 206.0 MB). Free memory was 101.9 MB in the beginning and 109.6 MB in the end (delta: -7.7 MB). Peak memory consumption was 198.4 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:18,868 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 05:46:18,868 INFO L168 Benchmark]: CACSL2BoogieTranslator took 660.61 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 101.5 MB in the beginning and 169.0 MB in the end (delta: -67.5 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:18,869 INFO L168 Benchmark]: Boogie Preprocessor took 61.55 ms. Allocated memory is still 202.9 MB. Free memory was 169.0 MB in the beginning and 166.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:18,869 INFO L168 Benchmark]: RCFGBuilder took 643.31 ms. Allocated memory is still 202.9 MB. Free memory was 166.3 MB in the beginning and 121.7 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:18,870 INFO L168 Benchmark]: TraceAbstraction took 12538.65 ms. Allocated memory was 202.9 MB in the beginning and 344.5 MB in the end (delta: 141.6 MB). Free memory was 121.0 MB in the beginning and 109.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 153.0 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:18,871 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 660.61 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 101.5 MB in the beginning and 169.0 MB in the end (delta: -67.5 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.55 ms. Allocated memory is still 202.9 MB. Free memory was 169.0 MB in the beginning and 166.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 643.31 ms. Allocated memory is still 202.9 MB. Free memory was 166.3 MB in the beginning and 121.7 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12538.65 ms. Allocated memory was 202.9 MB in the beginning and 344.5 MB in the end (delta: 141.6 MB). Free memory was 121.0 MB in the beginning and 109.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 153.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L522] COND FALSE !(a == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L523] List t; [L524] List p = a; VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L525] COND TRUE __VERIFIER_nondet_int() [L526] p->h = 1 [L527] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L528] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L529] p->n = t [L530] EXPR p->n [L530] p = p->n [L525] COND FALSE !(__VERIFIER_nondet_int()) [L532] COND TRUE __VERIFIER_nondet_int() [L533] p->h = 2 [L534] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, t={-3:0}] [L535] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, t={-3:0}] [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L532] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, t={-3:0}] [L541] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, p->h=1, t={-3:0}] [L541] COND FALSE !(p->h == 2) [L543] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, p->h=1, t={-3:0}] [L543] COND TRUE p->h == 1 [L544] EXPR p->n [L544] p = p->n [L543] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, p->h=2, t={-3:0}] [L543] COND FALSE !(p->h == 1) [L545] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, p->h=2, t={-3:0}] [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, t={-3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.4s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 247 SDtfs, 667 SDslu, 1390 SDs, 0 SdLazy, 2292 SolverSat, 302 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 388 GetRequests, 194 SyntacticMatches, 7 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 144 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 542 NumberOfCodeBlocks, 491 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 492 ConstructedInterpolants, 18 QuantifiedInterpolants, 140932 SizeOfPredicates, 102 NumberOfNonLiveVariables, 739 ConjunctsInSsa, 316 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 16/92 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...