/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 IntervalDomain -i ../sv-benchmarks/c/loops/insertion_sort-1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:57:46,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:57:46,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:57:46,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:57:46,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:57:46,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:57:46,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:57:46,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:57:46,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:57:46,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:57:46,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:57:46,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:57:46,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:57:46,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:57:46,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:57:46,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:57:46,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:57:46,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:57:46,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:57:46,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:57:46,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:57:46,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:57:46,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:57:46,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:57:46,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:57:46,562 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:57:46,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:57:46,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:57:46,563 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:57:46,564 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:57:46,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:57:46,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:57:46,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:57:46,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:57:46,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:57:46,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:57:46,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:57:46,568 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:57:46,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:57:46,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:57:46,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:57:46,571 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 [2023-03-31 22:57:46,600 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:57:46,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:57:46,601 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:57:46,601 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:57:46,602 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:57:46,602 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:57:46,602 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:57:46,602 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:57:46,603 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:57:46,603 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:57:46,603 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:57:46,604 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:57:46,604 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:57:46,604 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:57:46,604 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:57:46,604 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:57:46,604 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:57:46,604 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:57:46,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:57:46,605 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:57:46,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:57:46,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:57:46,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:57:46,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:57:46,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:57:46,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:57:46,606 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:57:46,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:57:46,606 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:57:46,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:57:46,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:57:46,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:57:46,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:57:46,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:57:46,607 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:57:46,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:57:46,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:57:46,608 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:57:46,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:57:46,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:57:46,608 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:57:46,608 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:57:46,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:57:46,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:57:46,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:57:46,814 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:57:46,814 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:57:46,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/insertion_sort-1-2.c [2023-03-31 22:57:47,999 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:57:48,192 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:57:48,193 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/insertion_sort-1-2.c [2023-03-31 22:57:48,198 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4958d3d3d/4221d353d32e4433ae135301884f6bc8/FLAGa224efac8 [2023-03-31 22:57:48,211 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4958d3d3d/4221d353d32e4433ae135301884f6bc8 [2023-03-31 22:57:48,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:57:48,215 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:57:48,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:57:48,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:57:48,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:57:48,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:57:48" (1/1) ... [2023-03-31 22:57:48,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59bf8886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:57:48, skipping insertion in model container [2023-03-31 22:57:48,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:57:48" (1/1) ... [2023-03-31 22:57:48,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:57:48,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:57:48,344 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/loops/insertion_sort-1-2.c[330,343] [2023-03-31 22:57:48,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:57:48,383 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:57:48,395 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/loops/insertion_sort-1-2.c[330,343] [2023-03-31 22:57:48,414 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:57:48,428 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:57:48,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:57:48 WrapperNode [2023-03-31 22:57:48,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:57:48,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:57:48,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:57:48,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:57:48,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:57:48" (1/1) ... [2023-03-31 22:57:48,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:57:48" (1/1) ... [2023-03-31 22:57:48,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:57:48" (1/1) ... [2023-03-31 22:57:48,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:57:48" (1/1) ... [2023-03-31 22:57:48,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:57:48" (1/1) ... [2023-03-31 22:57:48,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:57:48" (1/1) ... [2023-03-31 22:57:48,470 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:57:48" (1/1) ... [2023-03-31 22:57:48,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:57:48" (1/1) ... [2023-03-31 22:57:48,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:57:48,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:57:48,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:57:48,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:57:48,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:57:48" (1/1) ... [2023-03-31 22:57:48,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:57:48,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:57:48,505 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) [2023-03-31 22:57:48,507 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 [2023-03-31 22:57:48,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:57:48,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:57:48,540 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:57:48,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 22:57:48,542 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:57:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:57:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:57:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:57:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:57:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 22:57:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-03-31 22:57:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:57:48,543 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:57:48,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 22:57:48,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:57:48,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:57:48,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:57:48,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:57:48,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:57:48,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:57:48,598 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:57:48,600 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:57:48,753 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:57:48,814 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:57:48,815 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-03-31 22:57:48,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:57:48 BoogieIcfgContainer [2023-03-31 22:57:48,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:57:48,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:57:48,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:57:48,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:57:48,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:57:48" (1/3) ... [2023-03-31 22:57:48,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59a12214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:57:48, skipping insertion in model container [2023-03-31 22:57:48,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:57:48" (2/3) ... [2023-03-31 22:57:48,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59a12214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:57:48, skipping insertion in model container [2023-03-31 22:57:48,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:57:48" (3/3) ... [2023-03-31 22:57:48,825 INFO L112 eAbstractionObserver]: Analyzing ICFG insertion_sort-1-2.c [2023-03-31 22:57:48,841 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:57:48,841 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:57:48,886 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:57:48,903 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;@5ea4055d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:57:48,909 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:57:48,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:57:48,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-03-31 22:57:48,929 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:57:48,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:57:48,930 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:57:48,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:57:48,935 INFO L85 PathProgramCache]: Analyzing trace with hash 881694418, now seen corresponding path program 1 times [2023-03-31 22:57:48,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:57:48,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012420951] [2023-03-31 22:57:48,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:57:48,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:57:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:57:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:57:49,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:57:49,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012420951] [2023-03-31 22:57:49,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012420951] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:57:49,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:57:49,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 22:57:49,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010822473] [2023-03-31 22:57:49,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:57:49,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 22:57:49,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:57:49,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 22:57:49,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 22:57:49,417 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:57:49,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:57:49,536 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2023-03-31 22:57:49,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 22:57:49,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-03-31 22:57:49,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:57:49,544 INFO L225 Difference]: With dead ends: 48 [2023-03-31 22:57:49,544 INFO L226 Difference]: Without dead ends: 24 [2023-03-31 22:57:49,547 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 [2023-03-31 22:57:49,557 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:57:49,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 53 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:57:49,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-03-31 22:57:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2023-03-31 22:57:49,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:57:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-03-31 22:57:49,599 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2023-03-31 22:57:49,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:57:49,599 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-03-31 22:57:49,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:57:49,599 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-03-31 22:57:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 22:57:49,600 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:57:49,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:57:49,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:57:49,600 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:57:49,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:57:49,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1147278812, now seen corresponding path program 1 times [2023-03-31 22:57:49,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:57:49,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504851333] [2023-03-31 22:57:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:57:49,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:57:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:57:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:57:49,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:57:49,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504851333] [2023-03-31 22:57:49,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504851333] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:57:49,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:57:49,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 22:57:49,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982595164] [2023-03-31 22:57:49,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:57:49,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 22:57:49,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:57:49,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 22:57:49,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 22:57:49,826 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:57:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:57:49,871 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2023-03-31 22:57:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 22:57:49,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-03-31 22:57:49,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:57:49,874 INFO L225 Difference]: With dead ends: 36 [2023-03-31 22:57:49,874 INFO L226 Difference]: Without dead ends: 22 [2023-03-31 22:57:49,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 22:57:49,878 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:57:49,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:57:49,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-03-31 22:57:49,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-03-31 22:57:49,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:57:49,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-03-31 22:57:49,883 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2023-03-31 22:57:49,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:57:49,884 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-03-31 22:57:49,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:57:49,884 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-03-31 22:57:49,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 22:57:49,885 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:57:49,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:57:49,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:57:49,885 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:57:49,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:57:49,886 INFO L85 PathProgramCache]: Analyzing trace with hash 187589592, now seen corresponding path program 1 times [2023-03-31 22:57:49,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:57:49,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87233116] [2023-03-31 22:57:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:57:49,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:57:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:57:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:57:50,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:57:50,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87233116] [2023-03-31 22:57:50,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87233116] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:57:50,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798792635] [2023-03-31 22:57:50,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:57:50,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:57:50,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:57:50,019 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) [2023-03-31 22:57:50,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:57:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:57:50,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 22:57:50,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:57:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:57:50,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:57:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:57:50,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798792635] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:57:50,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2090054311] [2023-03-31 22:57:50,327 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 22:57:50,328 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:57:50,332 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:57:50,336 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:57:50,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:57:50,421 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 22:57:50,737 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2023-03-31 22:57:50,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:57:50,802 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:57:51,309 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '336#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#v~0.base_BEFORE_CALL_1| Int) (v_main_~j~0_BEFORE_CALL_1 Int) (v_main_~i~0_BEFORE_CALL_1 Int) (v_main_~SIZE~0_BEFORE_CALL_1 Int) (|v_main_~#v~0.offset_BEFORE_CALL_1| Int)) (and (or (and (<= 2 v_main_~j~0_BEFORE_CALL_1) (<= 0 |v_main_~#v~0.base_BEFORE_CALL_1|) (<= 0 v_main_~i~0_BEFORE_CALL_1) (= |v_main_~#v~0.offset_BEFORE_CALL_1| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (= v_main_~j~0_BEFORE_CALL_1 1) (<= 0 |v_main_~#v~0.base_BEFORE_CALL_1|) (= |v_main_~#v~0.offset_BEFORE_CALL_1| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (< 1 (mod v_main_~SIZE~0_BEFORE_CALL_1 4294967296)) (<= (mod v_main_~SIZE~0_BEFORE_CALL_1 4294967296) (mod v_main_~j~0_BEFORE_CALL_1 4294967296)) (< (select (select |#memory_int| |v_main_~#v~0.base_BEFORE_CALL_1|) (+ |v_main_~#v~0.offset_BEFORE_CALL_1| 4)) (select (select |#memory_int| |v_main_~#v~0.base_BEFORE_CALL_1|) |v_main_~#v~0.offset_BEFORE_CALL_1|)))))' at error location [2023-03-31 22:57:51,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:57:51,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:57:51,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-03-31 22:57:51,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953080079] [2023-03-31 22:57:51,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:57:51,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 22:57:51,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:57:51,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 22:57:51,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-03-31 22:57:51,314 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:57:51,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:57:51,395 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2023-03-31 22:57:51,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:57:51,396 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-03-31 22:57:51,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:57:51,396 INFO L225 Difference]: With dead ends: 40 [2023-03-31 22:57:51,396 INFO L226 Difference]: Without dead ends: 26 [2023-03-31 22:57:51,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-03-31 22:57:51,398 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:57:51,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 77 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:57:51,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-03-31 22:57:51,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-03-31 22:57:51,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:57:51,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-03-31 22:57:51,403 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2023-03-31 22:57:51,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:57:51,403 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-03-31 22:57:51,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:57:51,404 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-03-31 22:57:51,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-03-31 22:57:51,404 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:57:51,404 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:57:51,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:57:51,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:57:51,611 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:57:51,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:57:51,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1381162844, now seen corresponding path program 2 times [2023-03-31 22:57:51,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:57:51,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448388356] [2023-03-31 22:57:51,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:57:51,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:57:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:57:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:57:52,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:57:52,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448388356] [2023-03-31 22:57:52,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448388356] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:57:52,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361428563] [2023-03-31 22:57:52,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 22:57:52,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:57:52,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:57:52,289 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) [2023-03-31 22:57:52,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:57:52,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 22:57:52,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 22:57:52,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2023-03-31 22:57:52,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:57:52,403 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 [2023-03-31 22:57:52,425 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 13 treesize of output 9 [2023-03-31 22:57:52,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-03-31 22:57:52,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:57:52,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-03-31 22:57:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:57:52,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:57:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 22:57:56,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361428563] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:57:56,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [555897642] [2023-03-31 22:57:56,931 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 22:57:56,932 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:57:56,932 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:57:56,932 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:57:56,932 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:57:56,956 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 22:57:57,135 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2023-03-31 22:57:57,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:57:57,174 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:57:57,867 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '581#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#v~0.base_BEFORE_CALL_2| Int) (v_main_~j~0_BEFORE_CALL_2 Int) (|v_main_~#v~0.offset_BEFORE_CALL_2| Int) (v_main_~SIZE~0_BEFORE_CALL_2 Int) (v_main_~i~0_BEFORE_CALL_2 Int)) (and (or (and (= |v_main_~#v~0.offset_BEFORE_CALL_2| 0) (= v_main_~j~0_BEFORE_CALL_2 1) (<= 0 |v_main_~#v~0.base_BEFORE_CALL_2|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (= |v_main_~#v~0.offset_BEFORE_CALL_2| 0) (<= 2 v_main_~j~0_BEFORE_CALL_2) (<= 0 v_main_~i~0_BEFORE_CALL_2) (<= 0 |v_main_~#v~0.base_BEFORE_CALL_2|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (< 1 (mod v_main_~SIZE~0_BEFORE_CALL_2 4294967296)) (<= (mod v_main_~SIZE~0_BEFORE_CALL_2 4294967296) (mod v_main_~j~0_BEFORE_CALL_2 4294967296)) (< (select (select |#memory_int| |v_main_~#v~0.base_BEFORE_CALL_2|) (+ |v_main_~#v~0.offset_BEFORE_CALL_2| 4)) (select (select |#memory_int| |v_main_~#v~0.base_BEFORE_CALL_2|) |v_main_~#v~0.offset_BEFORE_CALL_2|)))))' at error location [2023-03-31 22:57:57,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:57:57,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:57:57,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 11] total 25 [2023-03-31 22:57:57,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356030715] [2023-03-31 22:57:57,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:57:57,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-03-31 22:57:57,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:57:57,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-03-31 22:57:57,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1247, Unknown=1, NotChecked=0, Total=1406 [2023-03-31 22:57:57,870 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:57:59,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:57:59,037 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2023-03-31 22:57:59,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-31 22:57:59,037 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-03-31 22:57:59,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:57:59,040 INFO L225 Difference]: With dead ends: 58 [2023-03-31 22:57:59,040 INFO L226 Difference]: Without dead ends: 56 [2023-03-31 22:57:59,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=286, Invalid=1969, Unknown=1, NotChecked=0, Total=2256 [2023-03-31 22:57:59,042 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 112 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:57:59,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 140 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 22:57:59,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-03-31 22:57:59,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 33. [2023-03-31 22:57:59,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:57:59,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-03-31 22:57:59,053 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 19 [2023-03-31 22:57:59,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:57:59,055 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-03-31 22:57:59,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:57:59,055 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-03-31 22:57:59,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:57:59,056 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:57:59,056 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:57:59,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 22:57:59,262 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,SelfDestructingSolverStorable3 [2023-03-31 22:57:59,263 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:57:59,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:57:59,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1408025448, now seen corresponding path program 1 times [2023-03-31 22:57:59,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:57:59,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321807316] [2023-03-31 22:57:59,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:57:59,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:57:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:57:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:57:59,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:57:59,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321807316] [2023-03-31 22:57:59,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321807316] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:57:59,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443349508] [2023-03-31 22:57:59,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:57:59,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:57:59,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:57:59,803 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) [2023-03-31 22:57:59,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:57:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:57:59,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2023-03-31 22:57:59,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:57:59,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2023-03-31 22:58:00,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:58:00,012 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 1 case distinctions, treesize of input 48 treesize of output 31 [2023-03-31 22:58:00,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:58:00,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2023-03-31 22:58:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 22:58:00,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:58:02,383 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 70 treesize of output 62 [2023-03-31 22:58:02,405 INFO L321 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-03-31 22:58:02,405 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 260 treesize of output 232 [2023-03-31 22:58:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 22:58:02,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443349508] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:58:02,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1350060526] [2023-03-31 22:58:02,503 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 22:58:02,503 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:58:02,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:58:02,503 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:58:02,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:58:02,521 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 22:58:02,640 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-03-31 22:58:02,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:58:02,668 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:58:03,314 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '900#(and (exists ((v_main_~j~0_BEFORE_CALL_3 Int) (|v_main_~#v~0.base_BEFORE_CALL_3| Int) (|v_main_~#v~0.offset_BEFORE_CALL_3| Int) (v_main_~SIZE~0_BEFORE_CALL_3 Int)) (and (< 1 (mod v_main_~SIZE~0_BEFORE_CALL_3 4294967296)) (or (and (<= 2 v_main_~j~0_BEFORE_CALL_3) (= |#NULL.offset| 0) (= |v_main_~#v~0.offset_BEFORE_CALL_3| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |v_main_~#v~0.base_BEFORE_CALL_3|) (= |#NULL.base| 0)) (and (= v_main_~j~0_BEFORE_CALL_3 1) (= |#NULL.offset| 0) (= |v_main_~#v~0.offset_BEFORE_CALL_3| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |v_main_~#v~0.base_BEFORE_CALL_3|) (= |#NULL.base| 0))) (<= (mod v_main_~SIZE~0_BEFORE_CALL_3 4294967296) (mod v_main_~j~0_BEFORE_CALL_3 4294967296)) (< (select (select |#memory_int| |v_main_~#v~0.base_BEFORE_CALL_3|) (+ |v_main_~#v~0.offset_BEFORE_CALL_3| 4)) (select (select |#memory_int| |v_main_~#v~0.base_BEFORE_CALL_3|) |v_main_~#v~0.offset_BEFORE_CALL_3|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 22:58:03,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:58:03,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:58:03,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11] total 25 [2023-03-31 22:58:03,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687204368] [2023-03-31 22:58:03,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:58:03,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-03-31 22:58:03,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:58:03,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-03-31 22:58:03,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2023-03-31 22:58:03,316 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 25 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:58:09,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:58:09,917 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2023-03-31 22:58:09,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-31 22:58:09,917 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-03-31 22:58:09,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:58:09,919 INFO L225 Difference]: With dead ends: 72 [2023-03-31 22:58:09,920 INFO L226 Difference]: Without dead ends: 59 [2023-03-31 22:58:09,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=200, Invalid=1606, Unknown=0, NotChecked=0, Total=1806 [2023-03-31 22:58:09,921 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:58:09,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 161 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 22:58:09,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-03-31 22:58:09,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2023-03-31 22:58:09,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 32 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:58:09,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-03-31 22:58:09,932 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 21 [2023-03-31 22:58:09,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:58:09,932 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-03-31 22:58:09,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:58:09,932 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-03-31 22:58:09,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 22:58:09,933 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:09,933 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:58:09,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 22:58:10,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:58:10,139 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:10,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:10,139 INFO L85 PathProgramCache]: Analyzing trace with hash 720643219, now seen corresponding path program 1 times [2023-03-31 22:58:10,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:10,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226285398] [2023-03-31 22:58:10,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:10,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:10,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 22:58:10,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:58:10,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226285398] [2023-03-31 22:58:10,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226285398] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:58:10,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231664476] [2023-03-31 22:58:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:10,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:58:10,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:58:10,306 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:58:10,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 22:58:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:10,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 22:58:10,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:58:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 22:58:10,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:58:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 22:58:10,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231664476] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:58:10,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2016102023] [2023-03-31 22:58:10,648 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-03-31 22:58:10,648 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:58:10,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:58:10,648 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:58:10,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:58:10,665 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 22:58:10,875 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-03-31 22:58:10,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:58:10,888 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:58:11,337 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1260#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:58:11,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:58:11,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:58:11,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-03-31 22:58:11,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202477174] [2023-03-31 22:58:11,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:58:11,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 22:58:11,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:58:11,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 22:58:11,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-03-31 22:58:11,340 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:58:11,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:58:11,540 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2023-03-31 22:58:11,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 22:58:11,541 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2023-03-31 22:58:11,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:58:11,541 INFO L225 Difference]: With dead ends: 84 [2023-03-31 22:58:11,541 INFO L226 Difference]: Without dead ends: 48 [2023-03-31 22:58:11,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2023-03-31 22:58:11,543 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:58:11,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 99 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:58:11,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-03-31 22:58:11,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2023-03-31 22:58:11,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 35 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:58:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-03-31 22:58:11,555 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 26 [2023-03-31 22:58:11,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:58:11,555 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-03-31 22:58:11,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:58:11,556 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-03-31 22:58:11,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 22:58:11,556 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:11,556 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:58:11,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 22:58:11,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:58:11,765 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:11,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:11,766 INFO L85 PathProgramCache]: Analyzing trace with hash -2123884818, now seen corresponding path program 2 times [2023-03-31 22:58:11,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:11,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564617565] [2023-03-31 22:58:11,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:11,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 22:58:12,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:58:12,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564617565] [2023-03-31 22:58:12,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564617565] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:58:12,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28455728] [2023-03-31 22:58:12,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 22:58:12,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:58:12,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:58:12,610 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:58:12,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 22:58:12,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-31 22:58:12,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 22:58:12,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 26 conjunts are in the unsatisfiable core [2023-03-31 22:58:12,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:58:12,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-31 22:58:12,850 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:58:12,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-03-31 22:58:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:58:12,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:58:12,997 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 57 treesize of output 51 [2023-03-31 22:58:13,017 INFO L321 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2023-03-31 22:58:13,018 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 87 treesize of output 80 [2023-03-31 22:58:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:58:13,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28455728] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:58:13,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [502182953] [2023-03-31 22:58:13,121 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 22:58:13,121 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:58:13,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:58:13,121 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:58:13,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:58:13,136 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 22:58:13,281 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 22:58:13,291 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:58:13,294 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:58:23,980 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1654#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#v~0.offset_BEFORE_CALL_11| Int) (|v_main_~#v~0.base_BEFORE_CALL_11| Int)) (< (select (select |#memory_int| |v_main_~#v~0.base_BEFORE_CALL_11|) (+ |v_main_~#v~0.offset_BEFORE_CALL_11| 4)) (select (select |#memory_int| |v_main_~#v~0.base_BEFORE_CALL_11|) |v_main_~#v~0.offset_BEFORE_CALL_11|))))' at error location [2023-03-31 22:58:23,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:58:23,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:58:23,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 27 [2023-03-31 22:58:23,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182142772] [2023-03-31 22:58:23,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:58:23,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-03-31 22:58:23,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:58:23,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-03-31 22:58:23,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1359, Unknown=1, NotChecked=0, Total=1482 [2023-03-31 22:58:23,982 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:58:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:58:28,858 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2023-03-31 22:58:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-03-31 22:58:28,859 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-03-31 22:58:28,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:58:28,860 INFO L225 Difference]: With dead ends: 94 [2023-03-31 22:58:28,860 INFO L226 Difference]: Without dead ends: 92 [2023-03-31 22:58:28,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=343, Invalid=2960, Unknown=3, NotChecked=0, Total=3306 [2023-03-31 22:58:28,862 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 153 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:58:28,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 139 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 22:58:28,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-03-31 22:58:28,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 50. [2023-03-31 22:58:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 43 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:58:28,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-03-31 22:58:28,874 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 26 [2023-03-31 22:58:28,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:58:28,874 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-03-31 22:58:28,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:58:28,874 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-03-31 22:58:28,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 22:58:28,875 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:28,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:58:28,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-03-31 22:58:29,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:58:29,081 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:29,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:29,082 INFO L85 PathProgramCache]: Analyzing trace with hash -538025618, now seen corresponding path program 3 times [2023-03-31 22:58:29,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:29,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944282028] [2023-03-31 22:58:29,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:29,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 22:58:29,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:58:29,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944282028] [2023-03-31 22:58:29,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944282028] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:58:29,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529991580] [2023-03-31 22:58:29,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 22:58:29,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:58:29,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:58:29,793 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:58:29,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 22:58:29,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 22:58:29,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 22:58:29,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2023-03-31 22:58:29,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:58:29,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-03-31 22:58:30,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:58:30,017 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 1 case distinctions, treesize of input 32 treesize of output 23 [2023-03-31 22:58:30,109 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:58:30,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2023-03-31 22:58:30,123 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:58:30,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2023-03-31 22:58:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:58:30,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:58:32,314 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_143 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ |c_main_~#v~0.offset| (* c_main_~j~0 4)) v_ArrVal_143))) (< (select .cse0 |c_main_~#v~0.offset|) (+ (select .cse0 (+ |c_main_~#v~0.offset| 4)) 1)))) is different from false [2023-03-31 22:58:34,644 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 144 treesize of output 132 [2023-03-31 22:58:34,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:58:34,676 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 31456 treesize of output 29876 [2023-03-31 22:58:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-03-31 22:58:35,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529991580] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:58:35,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [254055640] [2023-03-31 22:58:35,075 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 22:58:35,075 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:58:35,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:58:35,076 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:58:35,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:58:35,093 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 22:58:35,233 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 22:58:35,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:58:35,247 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:58:45,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2104#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#v~0.base_BEFORE_CALL_12| Int) (|v_main_~#v~0.offset_BEFORE_CALL_12| Int)) (< (select (select |#memory_int| |v_main_~#v~0.base_BEFORE_CALL_12|) (+ |v_main_~#v~0.offset_BEFORE_CALL_12| 4)) (select (select |#memory_int| |v_main_~#v~0.base_BEFORE_CALL_12|) |v_main_~#v~0.offset_BEFORE_CALL_12|))))' at error location [2023-03-31 22:58:45,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:58:45,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:58:45,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 30 [2023-03-31 22:58:45,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223220274] [2023-03-31 22:58:45,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:58:45,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-03-31 22:58:45,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:58:45,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-03-31 22:58:45,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1492, Unknown=2, NotChecked=78, Total=1722 [2023-03-31 22:58:45,976 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 30 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)