/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:51:44,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:51:44,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:51:44,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:51:44,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:51:44,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:51:44,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:51:44,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:51:44,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:51:44,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:51:44,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:51:44,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:51:44,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:51:44,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:51:44,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:51:44,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:51:44,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:51:44,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:51:44,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:51:44,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:51:44,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:51:44,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:51:44,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:51:44,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:51:44,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:51:44,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:51:44,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:51:44,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:51:44,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:51:44,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:51:44,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:51:44,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:51:44,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:51:44,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:51:44,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:51:44,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:51:44,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:51:44,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:51:44,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:51:44,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:51:44,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:51:44,624 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:51:44,656 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:51:44,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:51:44,656 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:51:44,657 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:51:44,657 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:51:44,657 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:51:44,658 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:51:44,658 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:51:44,658 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:51:44,658 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:51:44,659 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:51:44,659 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:51:44,659 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:51:44,659 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:51:44,659 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:51:44,659 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:51:44,659 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:51:44,660 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:51:44,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:51:44,660 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:51:44,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:51:44,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:51:44,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:51:44,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:51:44,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:51:44,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:51:44,661 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:51:44,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:51:44,661 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:51:44,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:51:44,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:51:44,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:51:44,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:51:44,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:51:44,662 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:51:44,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:51:44,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:51:44,663 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:51:44,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:51:44,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:51:44,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:51:44,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:51:44,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:51:44,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:51:44,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:51:44,937 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:51:44,937 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:51:44,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i [2023-04-01 04:51:46,119 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:51:46,351 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:51:46,352 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i [2023-04-01 04:51:46,363 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9385c3ea0/26a5c6b10cc64b5da53295335c6409a6/FLAGdcb0f140e [2023-04-01 04:51:46,374 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9385c3ea0/26a5c6b10cc64b5da53295335c6409a6 [2023-04-01 04:51:46,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:51:46,378 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:51:46,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:51:46,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:51:46,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:51:46,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:51:46" (1/1) ... [2023-04-01 04:51:46,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41ff7cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:46, skipping insertion in model container [2023-04-01 04:51:46,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:51:46" (1/1) ... [2023-04-01 04:51:46,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:51:46,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:51:46,684 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22534,22547] [2023-04-01 04:51:46,692 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22606,22619] [2023-04-01 04:51:46,694 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22746,22759] [2023-04-01 04:51:46,695 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22820,22833] [2023-04-01 04:51:46,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:51:46,711 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:51:46,752 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22534,22547] [2023-04-01 04:51:46,753 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22606,22619] [2023-04-01 04:51:46,754 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22746,22759] [2023-04-01 04:51:46,754 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22820,22833] [2023-04-01 04:51:46,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:51:46,786 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:51:46,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:46 WrapperNode [2023-04-01 04:51:46,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:51:46,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:51:46,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:51:46,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:51:46,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:46" (1/1) ... [2023-04-01 04:51:46,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:46" (1/1) ... [2023-04-01 04:51:46,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:46" (1/1) ... [2023-04-01 04:51:46,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:46" (1/1) ... [2023-04-01 04:51:46,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:46" (1/1) ... [2023-04-01 04:51:46,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:46" (1/1) ... [2023-04-01 04:51:46,854 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:46" (1/1) ... [2023-04-01 04:51:46,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:46" (1/1) ... [2023-04-01 04:51:46,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:51:46,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:51:46,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:51:46,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:51:46,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:46" (1/1) ... [2023-04-01 04:51:46,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:51:46,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:51:46,893 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:51:46,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:51:46,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:51:46,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:51:46,926 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:51:46,926 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:51:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 04:51:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 04:51:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 04:51:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 04:51:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 04:51:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 04:51:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 04:51:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 04:51:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 04:51:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 04:51:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 04:51:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 04:51:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 04:51:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 04:51:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 04:51:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 04:51:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 04:51:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 04:51:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 04:51:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 04:51:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 04:51:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 04:51:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 04:51:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 04:51:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 04:51:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 04:51:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 04:51:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 04:51:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 04:51:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 04:51:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 04:51:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 04:51:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 04:51:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 04:51:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 04:51:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 04:51:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 04:51:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 04:51:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 04:51:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 04:51:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 04:51:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 04:51:46,932 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 04:51:46,932 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 04:51:46,932 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 04:51:46,932 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 04:51:46,932 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 04:51:46,932 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 04:51:46,932 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 04:51:46,933 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 04:51:46,933 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 04:51:46,933 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 04:51:46,933 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 04:51:46,933 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 04:51:46,933 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 04:51:46,933 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 04:51:46,933 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 04:51:46,933 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 04:51:46,934 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-01 04:51:46,934 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:51:46,934 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 04:51:46,934 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-01 04:51:46,934 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 04:51:46,934 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:51:46,934 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-01 04:51:46,934 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 04:51:46,934 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 04:51:46,935 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 04:51:46,935 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 04:51:46,935 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 04:51:46,935 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 04:51:46,935 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 04:51:46,935 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 04:51:46,935 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 04:51:46,935 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 04:51:46,935 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 04:51:46,936 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 04:51:46,936 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 04:51:46,936 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 04:51:46,936 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 04:51:46,936 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 04:51:46,936 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 04:51:46,936 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 04:51:46,936 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 04:51:46,936 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 04:51:46,936 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 04:51:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 04:51:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 04:51:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 04:51:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 04:51:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 04:51:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 04:51:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 04:51:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 04:51:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 04:51:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 04:51:46,938 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 04:51:46,938 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 04:51:46,938 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 04:51:46,938 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 04:51:46,938 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 04:51:46,938 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 04:51:46,938 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 04:51:46,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:51:46,938 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:51:46,939 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 04:51:46,939 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 04:51:46,939 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:51:46,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:51:46,939 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:51:46,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 04:51:46,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:51:46,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 04:51:46,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 04:51:46,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:51:46,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:51:46,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:51:46,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:51:46,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:51:47,194 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:51:47,196 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:51:47,465 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:51:47,551 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:51:47,551 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-04-01 04:51:47,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:51:47 BoogieIcfgContainer [2023-04-01 04:51:47,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:51:47,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:51:47,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:51:47,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:51:47,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:51:46" (1/3) ... [2023-04-01 04:51:47,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3414d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:51:47, skipping insertion in model container [2023-04-01 04:51:47,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:46" (2/3) ... [2023-04-01 04:51:47,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3414d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:51:47, skipping insertion in model container [2023-04-01 04:51:47,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:51:47" (3/3) ... [2023-04-01 04:51:47,565 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2023-04-01 04:51:47,582 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:51:47,582 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-04-01 04:51:47,632 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:51:47,638 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c21e734, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:51:47,638 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-04-01 04:51:47,641 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 24 states have (on average 1.875) internal successors, (45), 28 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:51:47,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-04-01 04:51:47,648 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:47,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:47,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:51:47,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:47,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1533822277, now seen corresponding path program 1 times [2023-04-01 04:51:47,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:47,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556651637] [2023-04-01 04:51:47,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:47,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:47,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:47,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556651637] [2023-04-01 04:51:47,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556651637] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:47,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:51:47,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 04:51:47,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984207056] [2023-04-01 04:51:47,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:47,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 04:51:47,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:47,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 04:51:47,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:51:47,915 INFO L87 Difference]: Start difference. First operand has 33 states, 24 states have (on average 1.875) internal successors, (45), 28 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:47,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:47,961 INFO L93 Difference]: Finished difference Result 59 states and 89 transitions. [2023-04-01 04:51:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 04:51:47,963 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-04-01 04:51:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:47,971 INFO L225 Difference]: With dead ends: 59 [2023-04-01 04:51:47,971 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 04:51:47,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:51:47,980 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:47,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:51:47,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 04:51:48,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-01 04:51:48,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:48,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-04-01 04:51:48,006 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 9 [2023-04-01 04:51:48,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:48,006 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-04-01 04:51:48,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:48,007 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-04-01 04:51:48,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-01 04:51:48,007 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:48,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:48,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:51:48,008 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:51:48,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:48,008 INFO L85 PathProgramCache]: Analyzing trace with hash 291481305, now seen corresponding path program 1 times [2023-04-01 04:51:48,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:48,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366055378] [2023-04-01 04:51:48,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:48,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:48,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:48,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366055378] [2023-04-01 04:51:48,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366055378] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:48,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:51:48,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 04:51:48,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214838384] [2023-04-01 04:51:48,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:48,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:51:48,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:48,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:51:48,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:51:48,186 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:48,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:48,277 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2023-04-01 04:51:48,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 04:51:48,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-01 04:51:48,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:48,279 INFO L225 Difference]: With dead ends: 35 [2023-04-01 04:51:48,279 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 04:51:48,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:51:48,280 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:48,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 34 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:51:48,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 04:51:48,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2023-04-01 04:51:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-04-01 04:51:48,288 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 10 [2023-04-01 04:51:48,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:48,288 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-04-01 04:51:48,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:48,288 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-04-01 04:51:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 04:51:48,290 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:48,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:48,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:51:48,290 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:51:48,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:48,291 INFO L85 PathProgramCache]: Analyzing trace with hash -900362889, now seen corresponding path program 1 times [2023-04-01 04:51:48,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:48,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664135654] [2023-04-01 04:51:48,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:48,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:48,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:48,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664135654] [2023-04-01 04:51:48,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664135654] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:48,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:51:48,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 04:51:48,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520125321] [2023-04-01 04:51:48,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:48,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 04:51:48,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:48,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 04:51:48,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:51:48,602 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:48,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:48,775 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-04-01 04:51:48,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:51:48,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-01 04:51:48,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:48,777 INFO L225 Difference]: With dead ends: 55 [2023-04-01 04:51:48,777 INFO L226 Difference]: Without dead ends: 53 [2023-04-01 04:51:48,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:51:48,778 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:48,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 70 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:51:48,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-01 04:51:48,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2023-04-01 04:51:48,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2023-04-01 04:51:48,786 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 13 [2023-04-01 04:51:48,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:48,786 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2023-04-01 04:51:48,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:48,787 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2023-04-01 04:51:48,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 04:51:48,787 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:48,787 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:48,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:51:48,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:51:48,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:48,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1140006974, now seen corresponding path program 1 times [2023-04-01 04:51:48,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:48,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328929435] [2023-04-01 04:51:48,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:48,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:49,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:49,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328929435] [2023-04-01 04:51:49,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328929435] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:51:49,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3408079] [2023-04-01 04:51:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:49,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:51:49,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:51:49,504 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:51:49,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:51:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:49,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-01 04:51:49,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:51:49,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:51:49,819 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-04-01 04:51:49,821 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-04-01 04:51:50,085 INFO L321 Elim1Store]: treesize reduction 82, result has 29.9 percent of original size [2023-04-01 04:51:50,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 182 treesize of output 224 [2023-04-01 04:51:50,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 159 [2023-04-01 04:51:50,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 169 [2023-04-01 04:51:50,238 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-04-01 04:51:50,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 159 [2023-04-01 04:51:50,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 158 [2023-04-01 04:51:50,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 146 [2023-04-01 04:51:50,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 61 [2023-04-01 04:51:50,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-04-01 04:51:50,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:51:50,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:51:50,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:50,607 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 55 treesize of output 55 [2023-04-01 04:51:50,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:51:50,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:51:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:50,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:51:50,898 INFO L321 Elim1Store]: treesize reduction 20, result has 63.6 percent of original size [2023-04-01 04:51:50,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 238 [2023-04-01 04:51:50,949 INFO L321 Elim1Store]: treesize reduction 10, result has 70.6 percent of original size [2023-04-01 04:51:50,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 179 treesize of output 208 [2023-04-01 04:51:51,021 INFO L321 Elim1Store]: treesize reduction 20, result has 63.6 percent of original size [2023-04-01 04:51:51,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 170 treesize of output 217 [2023-04-01 04:51:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:51,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3408079] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:51:51,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [174661711] [2023-04-01 04:51:51,275 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 04:51:51,275 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:51:51,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:51:51,281 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:51:51,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:51:51,332 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:51:51,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:51:51,855 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:51:52,141 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '470#(and (<= 1 |#StackHeapBarrier|) (not (= main_~null~0.base main_~end~0.base)) (= main_~list~0.base main_~end~0.base) (= main_~end~0.offset 0) (<= (+ main_~list~0.base 1) |#StackHeapBarrier|) (= main_~list~0.offset 0) (not (= 1 (select (select |#memory_int| main_~end~0.base) 4))) (<= (+ main_~null~0.base 1) |#StackHeapBarrier|) (= |#NULL.offset| 0) (= main_~null~0.offset 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:51:52,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:51:52,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:51:52,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-04-01 04:51:52,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304405347] [2023-04-01 04:51:52,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:51:52,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 04:51:52,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:52,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 04:51:52,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-04-01 04:51:52,143 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:52,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:52,345 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2023-04-01 04:51:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:51:52,346 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-01 04:51:52,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:52,346 INFO L225 Difference]: With dead ends: 41 [2023-04-01 04:51:52,347 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 04:51:52,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2023-04-01 04:51:52,348 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 95 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:52,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 77 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:51:52,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 04:51:52,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 25. [2023-04-01 04:51:52,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-04-01 04:51:52,354 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 15 [2023-04-01 04:51:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:52,355 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-04-01 04:51:52,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:52,355 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-04-01 04:51:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 04:51:52,355 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:52,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:52,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 04:51:52,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:51:52,563 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:51:52,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:52,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1756125086, now seen corresponding path program 1 times [2023-04-01 04:51:52,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:52,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757899980] [2023-04-01 04:51:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:52,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:52,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:52,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757899980] [2023-04-01 04:51:52,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757899980] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:52,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:51:52,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:51:52,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029527481] [2023-04-01 04:51:52,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:52,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:51:52,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:52,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:51:52,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:51:52,639 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:52,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:52,719 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2023-04-01 04:51:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 04:51:52,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-04-01 04:51:52,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:52,720 INFO L225 Difference]: With dead ends: 40 [2023-04-01 04:51:52,720 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 04:51:52,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:51:52,721 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:52,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 65 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:51:52,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 04:51:52,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-04-01 04:51:52,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-04-01 04:51:52,727 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 17 [2023-04-01 04:51:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:52,728 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-04-01 04:51:52,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:52,728 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-04-01 04:51:52,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 04:51:52,728 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:52,729 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:52,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:51:52,729 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:51:52,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:52,729 INFO L85 PathProgramCache]: Analyzing trace with hash 844889653, now seen corresponding path program 1 times [2023-04-01 04:51:52,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:52,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107887620] [2023-04-01 04:51:52,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:52,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:52,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:52,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107887620] [2023-04-01 04:51:52,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107887620] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:51:52,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065671584] [2023-04-01 04:51:52,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:52,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:51:52,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:51:52,849 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:51:52,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:51:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:53,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 04:51:53,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:51:53,068 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2023-04-01 04:51:53,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 80 [2023-04-01 04:51:53,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 15 [2023-04-01 04:51:53,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-04-01 04:51:53,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 20 [2023-04-01 04:51:53,117 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 04:51:53,168 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2023-04-01 04:51:53,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 80 [2023-04-01 04:51:53,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 15 [2023-04-01 04:51:53,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-04-01 04:51:53,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:51:53,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 20 [2023-04-01 04:51:53,219 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 04:51:53,408 INFO L350 Elim1Store]: Elim1 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 [2023-04-01 04:51:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:53,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:51:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:53,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065671584] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:51:53,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1543662919] [2023-04-01 04:51:53,473 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 04:51:53,474 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:51:53,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:51:53,474 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:51:53,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:51:53,498 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:51:53,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:51:53,719 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:52:10,664 WARN L223 SmtUtils]: Spent 8.31s on a formula simplification. DAG size of input: 109 DAG size of output: 107 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 04:52:10,920 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '801#(and (<= 1 |#StackHeapBarrier|) (= main_~null~0.base main_~end~0.base) (= main_~end~0.offset 0) (<= (+ main_~list~0.base 1) |#StackHeapBarrier|) (= main_~list~0.offset 0) (<= (+ main_~null~0.base 1) |#StackHeapBarrier|) (= |#NULL.offset| 0) (= main_~null~0.offset 0) (exists ((v_main_~end~0.base_49 Int) (v_main_~end~0.offset_46 Int)) (and (= (select (select |#memory_$Pointer$.base| v_main_~end~0.base_49) v_main_~end~0.offset_46) main_~end~0.base) (or (not (= v_main_~end~0.base_49 main_~null~0.base)) (not (= v_main_~end~0.offset_46 0))) (= (select (select |#memory_int| v_main_~end~0.base_49) (+ v_main_~end~0.offset_46 4)) 0) (= (select (select |#memory_$Pointer$.offset| v_main_~end~0.base_49) v_main_~end~0.offset_46) 0))) (= |#NULL.base| 0))' at error location [2023-04-01 04:52:10,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:52:10,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:52:10,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-04-01 04:52:10,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099076367] [2023-04-01 04:52:10,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:52:10,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 04:52:10,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:52:10,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 04:52:10,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-04-01 04:52:10,922 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:11,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:52:11,116 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2023-04-01 04:52:11,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:52:11,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-04-01 04:52:11,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:52:11,118 INFO L225 Difference]: With dead ends: 51 [2023-04-01 04:52:11,118 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 04:52:11,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-04-01 04:52:11,119 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:52:11,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 65 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:52:11,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 04:52:11,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-01 04:52:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:11,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-04-01 04:52:11,124 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 20 [2023-04-01 04:52:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:52:11,125 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-04-01 04:52:11,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:52:11,125 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-04-01 04:52:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 04:52:11,125 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:52:11,125 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:52:11,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 04:52:11,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 04:52:11,326 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:52:11,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:52:11,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1237323150, now seen corresponding path program 1 times [2023-04-01 04:52:11,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:52:11,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095897313] [2023-04-01 04:52:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:52:11,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:52:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:52:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:52:12,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:52:12,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095897313] [2023-04-01 04:52:12,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095897313] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:52:12,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156224186] [2023-04-01 04:52:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:52:12,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:52:12,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:52:12,841 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:52:12,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:52:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:52:13,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 64 conjunts are in the unsatisfiable core [2023-04-01 04:52:13,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:52:13,031 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-01 04:52:13,034 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 9 treesize of output 11 [2023-04-01 04:52:13,178 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-04-01 04:52:13,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 213 [2023-04-01 04:52:13,292 INFO L321 Elim1Store]: treesize reduction 155, result has 20.5 percent of original size [2023-04-01 04:52:13,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 192 treesize of output 242 [2023-04-01 04:52:13,341 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 154 [2023-04-01 04:52:13,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 157 [2023-04-01 04:52:13,377 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 127 [2023-04-01 04:52:13,406 INFO L321 Elim1Store]: treesize reduction 34, result has 12.8 percent of original size [2023-04-01 04:52:13,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 312 treesize of output 282 [2023-04-01 04:52:13,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 177 [2023-04-01 04:52:13,469 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-04-01 04:52:13,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2023-04-01 04:52:13,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 5 [2023-04-01 04:52:13,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 100 [2023-04-01 04:52:13,727 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-04-01 04:52:13,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 118 [2023-04-01 04:52:13,737 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 23 [2023-04-01 04:52:13,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2023-04-01 04:52:13,790 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:52:13,791 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 1 [2023-04-01 04:52:13,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:13,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:13,848 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 04:52:13,848 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 110 treesize of output 96 [2023-04-01 04:52:13,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 45 [2023-04-01 04:52:14,871 INFO L350 Elim1Store]: Elim1 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 215 treesize of output 203 [2023-04-01 04:52:15,069 INFO L321 Elim1Store]: treesize reduction 8, result has 86.9 percent of original size [2023-04-01 04:52:15,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 244 [2023-04-01 04:52:16,827 INFO L321 Elim1Store]: treesize reduction 8, result has 86.9 percent of original size [2023-04-01 04:52:16,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 536 treesize of output 437 [2023-04-01 04:52:16,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 162 treesize of output 148 [2023-04-01 04:52:16,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 224 treesize of output 202 [2023-04-01 04:52:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:52:17,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:52:17,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:17,703 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 198 [2023-04-01 04:52:17,752 INFO L321 Elim1Store]: treesize reduction 31, result has 43.6 percent of original size [2023-04-01 04:52:17,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 264 treesize of output 262 [2023-04-01 04:52:17,804 INFO L321 Elim1Store]: treesize reduction 14, result has 68.2 percent of original size [2023-04-01 04:52:17,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 211 treesize of output 255 [2023-04-01 04:52:17,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:17,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 198 treesize of output 214 [2023-04-01 04:52:17,870 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:17,870 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 174 [2023-04-01 04:52:17,923 INFO L321 Elim1Store]: treesize reduction 37, result has 44.8 percent of original size [2023-04-01 04:52:17,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 174 treesize of output 204 [2023-04-01 04:52:17,983 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:17,983 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 11 treesize of output 10 [2023-04-01 04:52:18,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2023-04-01 04:52:18,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:18,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 192 treesize of output 167 [2023-04-01 04:52:18,228 INFO L321 Elim1Store]: treesize reduction 80, result has 48.7 percent of original size [2023-04-01 04:52:18,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 293 treesize of output 341 [2023-04-01 04:52:18,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:18,253 INFO L350 Elim1Store]: Elim1 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 285 treesize of output 279 [2023-04-01 04:52:18,275 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:18,275 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2023-04-01 04:52:20,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2023-04-01 04:52:20,566 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 04:52:20,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:20,635 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 29 [2023-04-01 04:52:20,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2023-04-01 04:52:20,933 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 04:52:20,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2023-04-01 04:52:21,024 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:21,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 175 [2023-04-01 04:52:21,798 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 04:52:21,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2023-04-01 04:52:21,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2023-04-01 04:52:21,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2023-04-01 04:52:22,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2023-04-01 04:52:22,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2023-04-01 04:52:22,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:22,048 INFO L350 Elim1Store]: Elim1 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 263 treesize of output 267 [2023-04-01 04:52:22,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2023-04-01 04:52:22,654 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 04:52:22,654 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 13 [2023-04-01 04:52:22,687 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 04:52:22,688 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 39 [2023-04-01 04:52:22,733 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 04:52:22,749 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 04:52:22,749 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 39 [2023-04-01 04:52:22,827 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 04:52:22,827 INFO L350 Elim1Store]: Elim1 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 68 treesize of output 61 [2023-04-01 04:52:22,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:52:22,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 270 treesize of output 288 [2023-04-01 04:52:23,371 INFO L321 Elim1Store]: treesize reduction 25, result has 49.0 percent of original size [2023-04-01 04:52:23,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 66 [2023-04-01 04:52:23,431 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 04:52:23,454 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 04:52:23,454 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 1 [2023-04-01 04:52:23,521 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 04:52:23,521 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 1 [2023-04-01 04:52:23,588 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 04:52:23,589 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 1 [2023-04-01 04:52:23,654 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 04:52:23,655 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 1 [2023-04-01 04:52:23,703 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 04:52:23,830 INFO L321 Elim1Store]: treesize reduction 25, result has 79.3 percent of original size [2023-04-01 04:52:23,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 205 [2023-04-01 04:52:24,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:52:24,222 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11