/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:22:01,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:22:01,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:22:01,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:22:01,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:22:01,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:22:01,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:22:01,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:22:01,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:22:01,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:22:01,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:22:01,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:22:01,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:22:01,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:22:01,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:22:01,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:22:01,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:22:01,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:22:01,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:22:01,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:22:01,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:22:01,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:22:01,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:22:01,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:22:01,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 16:22:01,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 16:22:01,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 16:22:01,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 16:22:01,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 16:22:01,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 16:22:01,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 16:22:01,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 16:22:01,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 16:22:01,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 16:22:01,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 16:22:01,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 16:22:01,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 16:22:01,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 16:22:01,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:22:01,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:22:01,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:22:01,631 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 16:22:01,645 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:22:01,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:22:01,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:22:01,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:22:01,647 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:22:01,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:22:01,648 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:22:01,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:22:01,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:22:01,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:22:01,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:22:01,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:22:01,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:22:01,649 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:22:01,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:22:01,649 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:22:01,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:22:01,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:22:01,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:22:01,650 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:22:01,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:22:01,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:22:01,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:22:01,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:22:01,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:22:01,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:22:01,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:01,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:22:01,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:22:01,652 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:22:01,979 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:22:01,993 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:22:01,999 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:22:02,000 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:22:02,001 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:22:02,003 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-07-21 16:22:02,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/081921646/8897aae762e7452ba31db560fa0a2990/FLAGee46c9b7f [2020-07-21 16:22:02,631 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:22:02,632 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-07-21 16:22:02,646 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/081921646/8897aae762e7452ba31db560fa0a2990/FLAGee46c9b7f [2020-07-21 16:22:02,897 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/081921646/8897aae762e7452ba31db560fa0a2990 [2020-07-21 16:22:02,908 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:22:02,910 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:22:02,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:22:02,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:22:02,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:22:02,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:22:02" (1/1) ... [2020-07-21 16:22:02,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@691807db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:02, skipping insertion in model container [2020-07-21 16:22:02,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:22:02" (1/1) ... [2020-07-21 16:22:02,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:22:02,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:22:03,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:22:03,455 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:22:03,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:22:03,600 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:22:03,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:03 WrapperNode [2020-07-21 16:22:03,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:22:03,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:22:03,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:22:03,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:22:03,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:03" (1/1) ... [2020-07-21 16:22:03,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:03" (1/1) ... [2020-07-21 16:22:03,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:03" (1/1) ... [2020-07-21 16:22:03,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:03" (1/1) ... [2020-07-21 16:22:03,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:03" (1/1) ... [2020-07-21 16:22:03,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:03" (1/1) ... [2020-07-21 16:22:03,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:03" (1/1) ... [2020-07-21 16:22:03,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:22:03,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:22:03,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:22:03,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:22:03,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:22:03,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:22:03,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:22:03,748 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:22:03,749 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 16:22:03,749 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 16:22:03,749 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 16:22:03,749 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 16:22:03,749 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 16:22:03,750 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 16:22:03,750 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 16:22:03,750 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 16:22:03,750 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 16:22:03,750 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 16:22:03,750 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 16:22:03,751 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 16:22:03,751 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 16:22:03,751 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 16:22:03,751 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 16:22:03,751 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 16:22:03,751 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 16:22:03,752 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 16:22:03,752 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 16:22:03,752 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 16:22:03,752 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 16:22:03,752 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 16:22:03,752 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 16:22:03,753 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 16:22:03,753 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 16:22:03,753 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 16:22:03,753 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 16:22:03,753 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 16:22:03,753 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 16:22:03,754 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 16:22:03,754 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 16:22:03,754 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 16:22:03,754 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 16:22:03,754 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 16:22:03,754 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 16:22:03,754 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 16:22:03,755 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 16:22:03,755 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 16:22:03,755 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 16:22:03,755 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 16:22:03,755 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 16:22:03,755 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 16:22:03,755 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 16:22:03,756 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 16:22:03,756 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 16:22:03,756 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 16:22:03,756 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 16:22:03,756 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 16:22:03,756 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 16:22:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 16:22:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 16:22:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 16:22:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 16:22:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 16:22:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 16:22:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 16:22:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 16:22:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 16:22:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 16:22:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:22:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 16:22:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 16:22:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 16:22:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 16:22:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 16:22:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 16:22:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 16:22:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 16:22:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 16:22:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 16:22:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 16:22:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 16:22:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 16:22:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 16:22:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 16:22:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 16:22:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 16:22:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 16:22:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 16:22:03,762 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 16:22:03,762 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 16:22:03,762 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 16:22:03,762 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 16:22:03,762 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 16:22:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 16:22:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 16:22:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 16:22:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 16:22:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 16:22:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 16:22:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 16:22:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 16:22:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 16:22:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 16:22:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 16:22:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 16:22:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 16:22:03,765 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 16:22:03,765 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 16:22:03,765 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 16:22:03,765 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 16:22:03,766 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 16:22:03,767 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 16:22:03,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:22:03,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:22:03,767 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:22:03,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 16:22:03,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 16:22:03,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 16:22:03,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:22:03,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:22:03,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:22:04,450 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:22:04,450 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-07-21 16:22:04,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:22:04 BoogieIcfgContainer [2020-07-21 16:22:04,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:22:04,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:22:04,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:22:04,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:22:04,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:22:02" (1/3) ... [2020-07-21 16:22:04,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63e90b04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:22:04, skipping insertion in model container [2020-07-21 16:22:04,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:03" (2/3) ... [2020-07-21 16:22:04,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63e90b04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:22:04, skipping insertion in model container [2020-07-21 16:22:04,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:22:04" (3/3) ... [2020-07-21 16:22:04,464 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-07-21 16:22:04,475 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:22:04,483 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-07-21 16:22:04,497 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-07-21 16:22:04,525 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:22:04,525 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:22:04,526 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:22:04,526 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:22:04,526 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:22:04,526 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:22:04,527 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:22:04,527 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:22:04,551 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-07-21 16:22:04,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-21 16:22:04,557 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:04,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:04,559 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:22:04,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:04,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454184, now seen corresponding path program 1 times [2020-07-21 16:22:04,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:04,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073393004] [2020-07-21 16:22:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:04,747 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:22:04,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:22:04,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:22:04,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:22:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:22:04,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:22:04,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073393004] [2020-07-21 16:22:04,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:22:04,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:22:04,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561571931] [2020-07-21 16:22:04,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:22:04,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:22:04,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:22:04,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:22:04,824 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 3 states. [2020-07-21 16:22:04,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:22:04,902 INFO L93 Difference]: Finished difference Result 186 states and 302 transitions. [2020-07-21 16:22:04,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:22:04,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-21 16:22:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:22:04,917 INFO L225 Difference]: With dead ends: 186 [2020-07-21 16:22:04,917 INFO L226 Difference]: Without dead ends: 99 [2020-07-21 16:22:04,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:22:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-21 16:22:04,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-07-21 16:22:04,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 16:22:04,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-07-21 16:22:04,971 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 8 [2020-07-21 16:22:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:22:04,972 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-07-21 16:22:04,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:22:04,972 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-07-21 16:22:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 16:22:04,973 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:04,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:05,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:05,185 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:22:05,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:05,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1461031906, now seen corresponding path program 1 times [2020-07-21 16:22:05,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:05,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672524326] [2020-07-21 16:22:05,188 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:05,314 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:22:05,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:22:05,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 16:22:05,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:22:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:22:05,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:22:05,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672524326] [2020-07-21 16:22:05,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:22:05,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:22:05,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894644676] [2020-07-21 16:22:05,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:22:05,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:22:05,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:22:05,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:22:05,337 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 3 states. [2020-07-21 16:22:05,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:22:05,360 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-07-21 16:22:05,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:22:05,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-21 16:22:05,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:22:05,363 INFO L225 Difference]: With dead ends: 84 [2020-07-21 16:22:05,363 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 16:22:05,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:22:05,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 16:22:05,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-07-21 16:22:05,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 16:22:05,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2020-07-21 16:22:05,386 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 14 [2020-07-21 16:22:05,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:22:05,386 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2020-07-21 16:22:05,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:22:05,386 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2020-07-21 16:22:05,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 16:22:05,387 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:05,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:05,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:05,603 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:22:05,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:05,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1461033828, now seen corresponding path program 1 times [2020-07-21 16:22:05,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:05,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793221287] [2020-07-21 16:22:05,605 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:05,699 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:22:05,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:22:05,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 16:22:05,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:22:05,759 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 13 treesize of output 9 [2020-07-21 16:22:05,760 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:05,767 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:05,772 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 13 treesize of output 9 [2020-07-21 16:22:05,772 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:05,779 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:05,780 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:22:05,780 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-21 16:22:05,801 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:22:05,803 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:22:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:22:05,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:22:05,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793221287] [2020-07-21 16:22:05,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:22:05,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:22:05,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949533063] [2020-07-21 16:22:05,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:22:05,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:22:05,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:22:05,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:22:05,819 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 4 states. [2020-07-21 16:22:05,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:22:05,931 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-07-21 16:22:05,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:22:05,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-21 16:22:05,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:22:05,934 INFO L225 Difference]: With dead ends: 138 [2020-07-21 16:22:05,934 INFO L226 Difference]: Without dead ends: 136 [2020-07-21 16:22:05,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:22:05,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-21 16:22:05,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-07-21 16:22:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-21 16:22:05,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-07-21 16:22:05,945 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 14 [2020-07-21 16:22:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:22:05,946 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-07-21 16:22:05,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:22:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-07-21 16:22:05,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 16:22:05,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:05,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:06,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:06,160 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:22:06,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:06,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1462880870, now seen corresponding path program 1 times [2020-07-21 16:22:06,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:06,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925055255] [2020-07-21 16:22:06,162 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:06,274 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:22:06,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:22:06,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 16:22:06,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:22:06,285 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 [2020-07-21 16:22:06,286 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:06,288 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:06,289 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:22:06,289 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-21 16:22:06,348 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:06,349 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-21 16:22:06,350 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:06,374 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:06,377 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_36|], 8=[|v_#memory_$Pointer$.base_36|]} [2020-07-21 16:22:06,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:22:06,383 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:06,397 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:06,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:22:06,405 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 24 [2020-07-21 16:22:06,405 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:06,417 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:06,419 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:22:06,419 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:186, output treesize:47 [2020-07-21 16:22:06,440 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 16:22:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:22:06,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:22:06,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925055255] [2020-07-21 16:22:06,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:22:06,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:22:06,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500630980] [2020-07-21 16:22:06,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:22:06,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:22:06,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:22:06,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:22:06,453 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 5 states. [2020-07-21 16:22:06,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:22:06,652 INFO L93 Difference]: Finished difference Result 221 states and 244 transitions. [2020-07-21 16:22:06,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:22:06,652 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 16:22:06,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:22:06,655 INFO L225 Difference]: With dead ends: 221 [2020-07-21 16:22:06,656 INFO L226 Difference]: Without dead ends: 152 [2020-07-21 16:22:06,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 16:22:06,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-21 16:22:06,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 81. [2020-07-21 16:22:06,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 16:22:06,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-07-21 16:22:06,667 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 14 [2020-07-21 16:22:06,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:22:06,667 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-07-21 16:22:06,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:22:06,667 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-07-21 16:22:06,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 16:22:06,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:06,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:06,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:06,883 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:22:06,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:06,884 INFO L82 PathProgramCache]: Analyzing trace with hash 177734485, now seen corresponding path program 1 times [2020-07-21 16:22:06,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:06,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715647290] [2020-07-21 16:22:06,885 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:06,986 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:22:06,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:22:06,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 16:22:06,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:22:07,003 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 [2020-07-21 16:22:07,004 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:07,006 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:07,006 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:22:07,007 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-21 16:22:07,036 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:07,037 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-21 16:22:07,038 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:07,047 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:07,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:22:07,051 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:07,057 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:07,059 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:22:07,059 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:46, output treesize:4 [2020-07-21 16:22:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:22:07,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:22:07,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715647290] [2020-07-21 16:22:07,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:22:07,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:22:07,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206896956] [2020-07-21 16:22:07,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:22:07,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:22:07,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:22:07,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:22:07,069 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 5 states. [2020-07-21 16:22:07,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:22:07,209 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-07-21 16:22:07,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:22:07,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-21 16:22:07,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:22:07,211 INFO L225 Difference]: With dead ends: 126 [2020-07-21 16:22:07,211 INFO L226 Difference]: Without dead ends: 122 [2020-07-21 16:22:07,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:22:07,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-21 16:22:07,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-07-21 16:22:07,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 16:22:07,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-07-21 16:22:07,219 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 19 [2020-07-21 16:22:07,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:22:07,220 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-07-21 16:22:07,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:22:07,220 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-07-21 16:22:07,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 16:22:07,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:07,222 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] [2020-07-21 16:22:07,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:07,436 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:22:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:07,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1214805939, now seen corresponding path program 1 times [2020-07-21 16:22:07,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:07,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401956514] [2020-07-21 16:22:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:07,524 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:22:07,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:22:07,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 16:22:07,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:22:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:22:07,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:22:07,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401956514] [2020-07-21 16:22:07,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:22:07,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:22:07,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015905896] [2020-07-21 16:22:07,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:22:07,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:22:07,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:22:07,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:22:07,558 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 5 states. [2020-07-21 16:22:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:22:07,642 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-07-21 16:22:07,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:22:07,643 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-21 16:22:07,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:22:07,644 INFO L225 Difference]: With dead ends: 136 [2020-07-21 16:22:07,644 INFO L226 Difference]: Without dead ends: 116 [2020-07-21 16:22:07,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:22:07,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-21 16:22:07,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-07-21 16:22:07,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 16:22:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-07-21 16:22:07,651 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 20 [2020-07-21 16:22:07,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:22:07,652 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-07-21 16:22:07,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:22:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-07-21 16:22:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 16:22:07,653 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:07,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:07,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:07,867 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:22:07,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:07,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1924122782, now seen corresponding path program 1 times [2020-07-21 16:22:07,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:07,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561102489] [2020-07-21 16:22:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:07,971 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:22:07,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:22:07,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 16:22:07,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:22:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:22:07,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:22:07,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561102489] [2020-07-21 16:22:07,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:22:07,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:22:07,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936784246] [2020-07-21 16:22:07,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:22:07,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:22:07,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:22:07,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:22:07,989 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 3 states. [2020-07-21 16:22:08,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:22:08,001 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2020-07-21 16:22:08,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:22:08,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 16:22:08,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:22:08,003 INFO L225 Difference]: With dead ends: 102 [2020-07-21 16:22:08,003 INFO L226 Difference]: Without dead ends: 100 [2020-07-21 16:22:08,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:22:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-21 16:22:08,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 78. [2020-07-21 16:22:08,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-21 16:22:08,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2020-07-21 16:22:08,010 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 24 [2020-07-21 16:22:08,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:22:08,010 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2020-07-21 16:22:08,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:22:08,011 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2020-07-21 16:22:08,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 16:22:08,012 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:08,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:08,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:08,226 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:22:08,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:08,227 INFO L82 PathProgramCache]: Analyzing trace with hash -481740404, now seen corresponding path program 1 times [2020-07-21 16:22:08,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:08,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700882031] [2020-07-21 16:22:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:08,310 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:22:08,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:22:08,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:22:08,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:22:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:22:08,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:22:08,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700882031] [2020-07-21 16:22:08,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:22:08,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:22:08,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411865398] [2020-07-21 16:22:08,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:22:08,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:22:08,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:22:08,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:22:08,337 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 3 states. [2020-07-21 16:22:08,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:22:08,352 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-07-21 16:22:08,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:22:08,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 16:22:08,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:22:08,354 INFO L225 Difference]: With dead ends: 78 [2020-07-21 16:22:08,355 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 16:22:08,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:22:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 16:22:08,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-07-21 16:22:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 16:22:08,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-07-21 16:22:08,363 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 25 [2020-07-21 16:22:08,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:22:08,366 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-07-21 16:22:08,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:22:08,366 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-07-21 16:22:08,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 16:22:08,367 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:08,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:08,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:08,581 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:22:08,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:08,582 INFO L82 PathProgramCache]: Analyzing trace with hash -611625627, now seen corresponding path program 1 times [2020-07-21 16:22:08,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:08,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957635610] [2020-07-21 16:22:08,583 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:08,721 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:22:08,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:22:08,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 16:22:08,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:22:08,734 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 13 treesize of output 9 [2020-07-21 16:22:08,735 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:08,745 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:08,749 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 13 treesize of output 9 [2020-07-21 16:22:08,750 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:08,755 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:08,756 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:22:08,756 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-21 16:22:08,766 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:22:08,767 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:22:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:22:08,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:22:08,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957635610] [2020-07-21 16:22:08,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:22:08,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:22:08,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163592437] [2020-07-21 16:22:08,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:22:08,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:22:08,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:22:08,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:22:08,779 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 4 states. [2020-07-21 16:22:08,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:22:08,868 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2020-07-21 16:22:08,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:22:08,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-07-21 16:22:08,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:22:08,869 INFO L225 Difference]: With dead ends: 86 [2020-07-21 16:22:08,869 INFO L226 Difference]: Without dead ends: 84 [2020-07-21 16:22:08,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:22:08,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-21 16:22:08,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2020-07-21 16:22:08,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-21 16:22:08,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2020-07-21 16:22:08,875 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 27 [2020-07-21 16:22:08,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:22:08,875 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2020-07-21 16:22:08,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:22:08,875 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2020-07-21 16:22:08,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 16:22:08,876 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:08,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:09,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:09,087 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:22:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:09,088 INFO L82 PathProgramCache]: Analyzing trace with hash -609778585, now seen corresponding path program 1 times [2020-07-21 16:22:09,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:09,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630795646] [2020-07-21 16:22:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:09,181 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:22:09,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:22:09,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 16:22:09,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:22:09,207 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 [2020-07-21 16:22:09,207 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:09,209 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:09,209 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:22:09,210 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-21 16:22:09,263 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:09,264 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 [2020-07-21 16:22:09,265 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:09,293 INFO L624 ElimStorePlain]: treesize reduction 14, result has 76.7 percent of original size [2020-07-21 16:22:09,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:22:09,298 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:09,304 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:09,306 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:22:09,307 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:48, output treesize:15 [2020-07-21 16:22:09,400 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:09,400 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 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 [2020-07-21 16:22:09,402 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:09,429 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:09,431 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_39|], 8=[|v_#memory_$Pointer$.base_40|]} [2020-07-21 16:22:09,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:22:09,436 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:09,456 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:09,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:22:09,476 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-07-21 16:22:09,477 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2020-07-21 16:22:09,477 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:09,494 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:09,496 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:22:09,496 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:195, output treesize:49 [2020-07-21 16:22:09,518 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 16:22:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:22:09,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:22:09,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630795646] [2020-07-21 16:22:09,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:22:09,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 16:22:09,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569356486] [2020-07-21 16:22:09,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 16:22:09,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:22:09,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 16:22:09,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:22:09,535 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 7 states. [2020-07-21 16:22:09,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:22:09,903 INFO L93 Difference]: Finished difference Result 212 states and 241 transitions. [2020-07-21 16:22:09,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 16:22:09,904 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-07-21 16:22:09,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:22:09,906 INFO L225 Difference]: With dead ends: 212 [2020-07-21 16:22:09,906 INFO L226 Difference]: Without dead ends: 150 [2020-07-21 16:22:09,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:22:09,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-21 16:22:09,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 76. [2020-07-21 16:22:09,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 16:22:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-07-21 16:22:09,926 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 27 [2020-07-21 16:22:09,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:22:09,927 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-07-21 16:22:09,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 16:22:09,927 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-07-21 16:22:09,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 16:22:09,928 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:09,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:10,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:10,144 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:22:10,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:10,144 INFO L82 PathProgramCache]: Analyzing trace with hash -2038545261, now seen corresponding path program 1 times [2020-07-21 16:22:10,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:10,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858954633] [2020-07-21 16:22:10,145 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:10,231 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:22:10,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:22:10,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 16:22:10,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:22:10,255 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 13 treesize of output 9 [2020-07-21 16:22:10,255 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:10,262 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:10,265 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 13 treesize of output 9 [2020-07-21 16:22:10,266 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:10,272 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:10,272 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:22:10,273 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2020-07-21 16:22:10,302 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 16:22:10,302 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:10,309 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:10,312 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 16:22:10,312 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:10,317 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:10,318 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:22:10,318 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-07-21 16:22:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:22:10,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:22:10,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858954633] [2020-07-21 16:22:10,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:22:10,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 16:22:10,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138265152] [2020-07-21 16:22:10,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 16:22:10,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:22:10,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 16:22:10,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:22:10,332 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 6 states. [2020-07-21 16:22:10,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:22:10,573 INFO L93 Difference]: Finished difference Result 202 states and 228 transitions. [2020-07-21 16:22:10,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 16:22:10,574 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-21 16:22:10,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:22:10,576 INFO L225 Difference]: With dead ends: 202 [2020-07-21 16:22:10,576 INFO L226 Difference]: Without dead ends: 161 [2020-07-21 16:22:10,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-07-21 16:22:10,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-07-21 16:22:10,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 98. [2020-07-21 16:22:10,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-21 16:22:10,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2020-07-21 16:22:10,590 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 28 [2020-07-21 16:22:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:22:10,593 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2020-07-21 16:22:10,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 16:22:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2020-07-21 16:22:10,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 16:22:10,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:10,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:10,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:10,818 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:22:10,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:10,819 INFO L82 PathProgramCache]: Analyzing trace with hash 567478293, now seen corresponding path program 1 times [2020-07-21 16:22:10,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:10,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507695687] [2020-07-21 16:22:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:10,914 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:22:10,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:22:10,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 16:22:10,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:22:10,929 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 [2020-07-21 16:22:10,929 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:10,934 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:10,935 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:22:10,935 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-21 16:22:10,963 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:10,963 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 [2020-07-21 16:22:10,965 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:11,013 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:11,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:22:11,041 INFO L350 Elim1Store]: treesize reduction 89, result has 7.3 percent of original size [2020-07-21 16:22:11,041 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 1 case distinctions, treesize of input 141 treesize of output 130 [2020-07-21 16:22:11,042 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:11,079 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:11,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:22:11,088 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 31 [2020-07-21 16:22:11,088 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:11,119 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:11,120 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:22:11,120 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:356, output treesize:75 [2020-07-21 16:22:11,231 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 16:22:11,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:22:11,246 INFO L350 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2020-07-21 16:22:11,247 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 55 [2020-07-21 16:22:11,248 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 16:22:11,252 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 16:22:11,254 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:22:11,279 INFO L624 ElimStorePlain]: treesize reduction 8, result has 84.0 percent of original size [2020-07-21 16:22:11,292 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:11,293 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 34 [2020-07-21 16:22:11,294 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:11,305 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:11,306 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:22:11,307 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:94, output treesize:7 [2020-07-21 16:22:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:22:11,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:22:11,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507695687] [2020-07-21 16:22:11,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:22:11,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 16:22:11,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967874596] [2020-07-21 16:22:11,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 16:22:11,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:22:11,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 16:22:11,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:22:11,331 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 7 states. [2020-07-21 16:22:12,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:22:12,083 INFO L93 Difference]: Finished difference Result 240 states and 268 transitions. [2020-07-21 16:22:12,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:22:12,084 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-21 16:22:12,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:22:12,087 INFO L225 Difference]: With dead ends: 240 [2020-07-21 16:22:12,087 INFO L226 Difference]: Without dead ends: 238 [2020-07-21 16:22:12,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-21 16:22:12,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-07-21 16:22:12,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 110. [2020-07-21 16:22:12,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-07-21 16:22:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 127 transitions. [2020-07-21 16:22:12,098 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 127 transitions. Word has length 28 [2020-07-21 16:22:12,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:22:12,099 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 127 transitions. [2020-07-21 16:22:12,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 16:22:12,099 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 127 transitions. [2020-07-21 16:22:12,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 16:22:12,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:12,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:12,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:12,314 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:22:12,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:12,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1176203735, now seen corresponding path program 1 times [2020-07-21 16:22:12,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:12,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572666796] [2020-07-21 16:22:12,316 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:12,397 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:22:12,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:22:12,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:22:12,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:22:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 16:22:12,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:22:12,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572666796] [2020-07-21 16:22:12,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:22:12,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:22:12,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416972239] [2020-07-21 16:22:12,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:22:12,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:22:12,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:22:12,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:22:12,415 INFO L87 Difference]: Start difference. First operand 110 states and 127 transitions. Second operand 3 states. [2020-07-21 16:22:12,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:22:12,468 INFO L93 Difference]: Finished difference Result 111 states and 128 transitions. [2020-07-21 16:22:12,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:22:12,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-21 16:22:12,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:22:12,471 INFO L225 Difference]: With dead ends: 111 [2020-07-21 16:22:12,472 INFO L226 Difference]: Without dead ends: 109 [2020-07-21 16:22:12,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:22:12,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-07-21 16:22:12,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-07-21 16:22:12,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-21 16:22:12,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2020-07-21 16:22:12,488 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 30 [2020-07-21 16:22:12,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:22:12,488 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2020-07-21 16:22:12,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:22:12,488 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2020-07-21 16:22:12,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 16:22:12,490 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:12,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:12,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:12,705 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:22:12,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:12,706 INFO L82 PathProgramCache]: Analyzing trace with hash 758661948, now seen corresponding path program 1 times [2020-07-21 16:22:12,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:12,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860775350] [2020-07-21 16:22:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:12,819 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:22:12,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:22:12,819 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:22:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:22:12,862 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:22:12,889 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:22:12,890 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:22:13,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:13,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:22:13 BoogieIcfgContainer [2020-07-21 16:22:13,143 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:22:13,144 INFO L168 Benchmark]: Toolchain (without parser) took 10235.14 ms. Allocated memory was 137.9 MB in the beginning and 325.1 MB in the end (delta: 187.2 MB). Free memory was 98.4 MB in the beginning and 287.6 MB in the end (delta: -189.2 MB). Peak memory consumption was 176.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:22:13,145 INFO L168 Benchmark]: CDTParser took 2.28 ms. Allocated memory is still 137.9 MB. Free memory is still 118.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 16:22:13,145 INFO L168 Benchmark]: CACSL2BoogieTranslator took 689.46 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 98.0 MB in the beginning and 168.1 MB in the end (delta: -70.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2020-07-21 16:22:13,145 INFO L168 Benchmark]: Boogie Preprocessor took 76.53 ms. Allocated memory is still 201.3 MB. Free memory was 168.1 MB in the beginning and 164.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2020-07-21 16:22:13,146 INFO L168 Benchmark]: RCFGBuilder took 776.93 ms. Allocated memory is still 201.3 MB. Free memory was 164.9 MB in the beginning and 109.3 MB in the end (delta: 55.6 MB). Peak memory consumption was 55.6 MB. Max. memory is 7.1 GB. [2020-07-21 16:22:13,146 INFO L168 Benchmark]: TraceAbstraction took 8686.37 ms. Allocated memory was 201.3 MB in the beginning and 325.1 MB in the end (delta: 123.7 MB). Free memory was 109.3 MB in the beginning and 287.6 MB in the end (delta: -178.3 MB). Peak memory consumption was 124.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:22:13,150 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.28 ms. Allocated memory is still 137.9 MB. Free memory is still 118.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 689.46 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 98.0 MB in the beginning and 168.1 MB in the end (delta: -70.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 76.53 ms. Allocated memory is still 201.3 MB. Free memory was 168.1 MB in the beginning and 164.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 776.93 ms. Allocated memory is still 201.3 MB. Free memory was 164.9 MB in the beginning and 109.3 MB in the end (delta: 55.6 MB). Peak memory consumption was 55.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8686.37 ms. Allocated memory was 201.3 MB in the beginning and 325.1 MB in the end (delta: 123.7 MB). Free memory was 109.3 MB in the beginning and 287.6 MB in the end (delta: -178.3 MB). Peak memory consumption was 124.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1029]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L992] SLL* list = malloc(sizeof(SLL)); [L993] list->next = ((void*)0) [L994] list->prev = ((void*)0) VAL [list={32286:0}, malloc(sizeof(SLL))={32286:0}] [L995] COND FALSE !(!(list != ((void*)0))) VAL [list={32286:0}, malloc(sizeof(SLL))={32286:0}] [L995] COND FALSE !(__VERIFIER_nondet_int()) [L995] list->inner = malloc(sizeof(SLL)) [L995] EXPR list->inner [L995] list->inner->next = ((void*)0) [L995] EXPR list->inner [L995] list->inner->inner = ((void*)0) [L995] EXPR list->inner [L995] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) VAL [list={32286:0}, list->inner={-1:0}, list->inner != ((void*)0) || list->inner == ((void*)0)=1, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={32286:0}] [L995] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L997] SLL* end = list; VAL [end={32286:0}, list={32286:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={32286:0}] [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1011] end = ((void*)0) [L1012] end = list VAL [end={32286:0}, list={32286:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={32286:0}] [L1015] COND FALSE !(!(((void*)0) != end)) VAL [end={32286:0}, list={32286:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={32286:0}] [L1017] COND TRUE ((void*)0) != end [L1019] int len = 0; [L1020] EXPR end->inner [L1020] SLL* inner = end->inner; [L1021] COND TRUE ((void*)0) != inner VAL [end={32286:0}, inner={-1:0}, len=0, list={32286:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={32286:0}] [L1023] COND TRUE len == 0 [L1024] len = 1 VAL [end={32286:0}, inner={-1:0}, len=1, list={32286:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={32286:0}] [L1027] COND FALSE !(!(((void*)0) != inner)) VAL [end={32286:0}, inner={-1:0}, len=1, list={32286:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={32286:0}] [L1028] EXPR inner->inner VAL [end={32286:0}, inner={-1:0}, inner->inner={0:0}, len=1, list={32286:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={32286:0}] [L1028] COND FALSE !(!(((void*)0) == inner->inner)) [L1029] EXPR inner->next VAL [end={32286:0}, inner={-1:0}, inner->next={0:0}, len=1, list={32286:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={32286:0}] [L1029] COND TRUE !(((void*)0) != inner->next) [L1029] __VERIFIER_error() VAL [end={32286:0}, inner={-1:0}, len=1, list={32286:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={32286:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 88 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.5s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1042 SDtfs, 1360 SDslu, 1737 SDs, 0 SdLazy, 801 SolverSat, 83 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 289 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred 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: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 519 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 309 NumberOfCodeBlocks, 211 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 265 ConstructedInterpolants, 12 QuantifiedInterpolants, 55053 SizeOfPredicates, 67 NumberOfNonLiveVariables, 874 ConjunctsInSsa, 133 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 PerfectInterpolantSequences, 1/1 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...