/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 EqDomain -i ../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:40:01,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:40:01,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:40:01,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 08:40:01,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 08:40:01,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 08:40:01,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 08:40:01,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 08:40:01,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 08:40:01,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 08:40:01,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 08:40:01,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 08:40:01,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:40:01,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:40:01,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:40:01,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:40:01,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:40:01,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:40:01,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:40:01,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:40:01,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:40:01,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:40:01,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:40:01,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:40:01,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 08:40:01,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:40:01,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:40:01,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:40:01,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:40:01,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:40:01,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:40:01,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:40:01,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:40:01,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:40:01,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:40:01,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:40:01,522 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 08:40:01,558 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:40:01,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:40:01,559 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:40:01,559 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:40:01,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:40:01,560 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:40:01,560 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:40:01,560 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:40:01,560 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:40:01,560 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:40:01,560 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:40:01,561 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:40:01,561 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:40:01,561 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:40:01,561 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:40:01,561 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:40:01,561 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:40:01,561 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:40:01,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:40:01,562 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:40:01,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:40:01,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:40:01,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:40:01,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:40:01,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:40:01,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:40:01,563 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:40:01,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:40:01,563 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:40:01,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:40:01,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:40:01,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:40:01,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:40:01,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:40:01,564 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:40:01,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:40:01,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:40:01,564 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:40:01,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:40:01,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:40:01,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:40:01,566 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:40:01,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:40:01,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:40:01,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:40:01,790 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:40:01,791 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:40:01,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2023-04-01 08:40:02,992 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:40:03,161 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:40:03,162 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2023-04-01 08:40:03,169 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/782f0c991/78210ca92d934708bfd0784affe2b579/FLAG2463b484f [2023-04-01 08:40:03,183 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/782f0c991/78210ca92d934708bfd0784affe2b579 [2023-04-01 08:40:03,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:40:03,186 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:40:03,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:40:03,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:40:03,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:40:03,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:40:03" (1/1) ... [2023-04-01 08:40:03,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a9397df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:40:03, skipping insertion in model container [2023-04-01 08:40:03,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:40:03" (1/1) ... [2023-04-01 08:40:03,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:40:03,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:40:03,319 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/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2023-04-01 08:40:03,340 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:40:03,347 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:40:03,356 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/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2023-04-01 08:40:03,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:40:03,377 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:40:03,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:40:03 WrapperNode [2023-04-01 08:40:03,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:40:03,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:40:03,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:40:03,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:40:03,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:40:03" (1/1) ... [2023-04-01 08:40:03,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:40:03" (1/1) ... [2023-04-01 08:40:03,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:40:03" (1/1) ... [2023-04-01 08:40:03,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:40:03" (1/1) ... [2023-04-01 08:40:03,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:40:03" (1/1) ... [2023-04-01 08:40:03,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:40:03" (1/1) ... [2023-04-01 08:40:03,407 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:40:03" (1/1) ... [2023-04-01 08:40:03,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:40:03" (1/1) ... [2023-04-01 08:40:03,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:40:03,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:40:03,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:40:03,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:40:03,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:40:03" (1/1) ... [2023-04-01 08:40:03,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:40:03,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:40:03,450 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 08:40:03,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 08:40:03,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:40:03,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:40:03,482 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:40:03,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 08:40:03,482 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2023-04-01 08:40:03,483 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2023-04-01 08:40:03,483 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:40:03,483 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:40:03,483 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:40:03,483 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 08:40:03,483 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 08:40:03,483 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:40:03,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:40:03,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 08:40:03,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 08:40:03,484 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2023-04-01 08:40:03,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:40:03,484 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2023-04-01 08:40:03,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:40:03,484 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:40:03,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 08:40:03,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:40:03,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:40:03,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:40:03,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:40:03,554 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:40:03,557 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:40:03,852 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:40:03,932 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:40:03,932 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-04-01 08:40:03,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:40:03 BoogieIcfgContainer [2023-04-01 08:40:03,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:40:03,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:40:03,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:40:03,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:40:03,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:40:03" (1/3) ... [2023-04-01 08:40:03,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@508dda5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:40:03, skipping insertion in model container [2023-04-01 08:40:03,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:40:03" (2/3) ... [2023-04-01 08:40:03,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@508dda5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:40:03, skipping insertion in model container [2023-04-01 08:40:03,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:40:03" (3/3) ... [2023-04-01 08:40:03,945 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2023-04-01 08:40:03,961 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:40:03,962 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:40:04,021 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:40:04,029 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;@58c5b4d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:40:04,029 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:40:04,034 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 08:40:04,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 08:40:04,041 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:40:04,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:40:04,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:40:04,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:40:04,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1516028163, now seen corresponding path program 1 times [2023-04-01 08:40:04,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:40:04,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537361048] [2023-04-01 08:40:04,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:40:04,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:40:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:40:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:40:04,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:40:04,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537361048] [2023-04-01 08:40:04,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537361048] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:40:04,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:40:04,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 08:40:04,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396629754] [2023-04-01 08:40:04,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:40:04,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:40:04,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:40:04,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:40:04,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:40:04,324 INFO L87 Difference]: Start difference. First operand has 38 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-04-01 08:40:04,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:40:04,392 INFO L93 Difference]: Finished difference Result 88 states and 125 transitions. [2023-04-01 08:40:04,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:40:04,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2023-04-01 08:40:04,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:40:04,409 INFO L225 Difference]: With dead ends: 88 [2023-04-01 08:40:04,409 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 08:40:04,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:40:04,415 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:40:04,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 58 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:40:04,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 08:40:04,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2023-04-01 08:40:04,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 08:40:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-04-01 08:40:04,462 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 12 [2023-04-01 08:40:04,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:40:04,463 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-04-01 08:40:04,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-04-01 08:40:04,463 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-04-01 08:40:04,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 08:40:04,464 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:40:04,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:40:04,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 08:40:04,464 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:40:04,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:40:04,465 INFO L85 PathProgramCache]: Analyzing trace with hash -68675596, now seen corresponding path program 1 times [2023-04-01 08:40:04,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:40:04,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056313033] [2023-04-01 08:40:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:40:04,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:40:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:40:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:40:04,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:40:04,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056313033] [2023-04-01 08:40:04,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056313033] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:40:04,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623001585] [2023-04-01 08:40:04,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:40:04,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:40:04,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:40:04,538 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:40:04,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 08:40:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:40:04,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:40:04,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:40:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:40:04,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:40:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:40:04,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623001585] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:40:04,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1158383111] [2023-04-01 08:40:04,721 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:40:04,721 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:40:04,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:40:04,728 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:40:04,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:40:04,853 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:40:05,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:40:05,138 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:40:05,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1158383111] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:40:05,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:40:05,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4, 4] total 13 [2023-04-01 08:40:05,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523872582] [2023-04-01 08:40:05,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:40:05,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 08:40:05,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:40:05,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 08:40:05,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-04-01 08:40:05,498 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 8 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:40:06,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:40:06,234 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2023-04-01 08:40:06,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 08:40:06,235 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 3 states have call successors, (3), 3 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 [2023-04-01 08:40:06,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:40:06,238 INFO L225 Difference]: With dead ends: 84 [2023-04-01 08:40:06,238 INFO L226 Difference]: Without dead ends: 53 [2023-04-01 08:40:06,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-04-01 08:40:06,242 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 99 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 08:40:06,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 4 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 08:40:06,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-01 08:40:06,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2023-04-01 08:40:06,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 08:40:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2023-04-01 08:40:06,269 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 13 [2023-04-01 08:40:06,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:40:06,269 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2023-04-01 08:40:06,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:40:06,269 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2023-04-01 08:40:06,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 08:40:06,270 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:40:06,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:40:06,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 08:40:06,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:40:06,479 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:40:06,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:40:06,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1059173312, now seen corresponding path program 1 times [2023-04-01 08:40:06,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:40:06,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531185743] [2023-04-01 08:40:06,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:40:06,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:40:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:40:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 08:40:06,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:40:06,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531185743] [2023-04-01 08:40:06,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531185743] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:40:06,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000235208] [2023-04-01 08:40:06,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:40:06,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:40:06,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:40:06,642 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:40:06,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 08:40:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:40:06,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 08:40:06,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:40:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 08:40:06,733 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:40:06,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000235208] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:40:06,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 08:40:06,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 08:40:06,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207917430] [2023-04-01 08:40:06,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:40:06,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:40:06,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:40:06,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:40:06,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:40:06,736 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 08:40:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:40:06,779 INFO L93 Difference]: Finished difference Result 81 states and 102 transitions. [2023-04-01 08:40:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:40:06,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-04-01 08:40:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:40:06,781 INFO L225 Difference]: With dead ends: 81 [2023-04-01 08:40:06,782 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 08:40:06,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:40:06,784 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:40:06,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 48 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:40:06,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 08:40:06,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2023-04-01 08:40:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 08:40:06,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2023-04-01 08:40:06,803 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 29 [2023-04-01 08:40:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:40:06,803 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2023-04-01 08:40:06,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 08:40:06,803 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2023-04-01 08:40:06,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 08:40:06,805 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:40:06,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:40:06,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 08:40:07,010 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,SelfDestructingSolverStorable2 [2023-04-01 08:40:07,011 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:40:07,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:40:07,011 INFO L85 PathProgramCache]: Analyzing trace with hash -427584065, now seen corresponding path program 1 times [2023-04-01 08:40:07,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:40:07,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830869975] [2023-04-01 08:40:07,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:40:07,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:40:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:40:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 08:40:07,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:40:07,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830869975] [2023-04-01 08:40:07,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830869975] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:40:07,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742011743] [2023-04-01 08:40:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:40:07,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:40:07,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:40:07,116 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:40:07,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 08:40:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:40:07,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:40:07,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:40:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 08:40:07,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:40:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 08:40:07,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742011743] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:40:07,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2143180462] [2023-04-01 08:40:07,249 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-04-01 08:40:07,249 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:40:07,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:40:07,250 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:40:07,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:40:07,310 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:40:08,495 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 68 for LOIs [2023-04-01 08:40:08,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:40:08,529 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 74 for LOIs [2023-04-01 08:40:08,624 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:40:10,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2143180462] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:40:10,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:40:10,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [4, 4, 4] total 25 [2023-04-01 08:40:10,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024820632] [2023-04-01 08:40:10,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:40:10,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 08:40:10,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:40:10,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 08:40:10,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2023-04-01 08:40:10,564 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 08:40:12,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:40:12,606 INFO L93 Difference]: Finished difference Result 102 states and 132 transitions. [2023-04-01 08:40:12,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 08:40:12,607 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2023-04-01 08:40:12,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:40:12,608 INFO L225 Difference]: With dead ends: 102 [2023-04-01 08:40:12,608 INFO L226 Difference]: Without dead ends: 73 [2023-04-01 08:40:12,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=319, Invalid=1573, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 08:40:12,610 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 115 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 08:40:12,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 7 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 08:40:12,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-01 08:40:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2023-04-01 08:40:12,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.302325581395349) internal successors, (56), 44 states have internal predecessors, (56), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-04-01 08:40:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2023-04-01 08:40:12,626 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 30 [2023-04-01 08:40:12,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:40:12,626 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2023-04-01 08:40:12,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 08:40:12,626 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2023-04-01 08:40:12,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 08:40:12,627 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:40:12,627 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:40:12,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 08:40:12,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:40:12,832 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:40:12,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:40:12,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1006294764, now seen corresponding path program 1 times [2023-04-01 08:40:12,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:40:12,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362115121] [2023-04-01 08:40:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:40:12,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:40:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:40:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:40:12,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:40:12,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362115121] [2023-04-01 08:40:12,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362115121] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:40:12,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013918531] [2023-04-01 08:40:12,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:40:12,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:40:12,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:40:12,944 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) [2023-04-01 08:40:12,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 08:40:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:40:13,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:40:13,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:40:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:40:13,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:40:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:40:13,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013918531] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:40:13,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1562529241] [2023-04-01 08:40:13,067 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 08:40:13,068 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:40:13,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:40:13,069 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:40:13,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:40:13,096 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:40:15,610 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2023-04-01 08:40:15,635 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 81 for LOIs [2023-04-01 08:40:15,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:40:15,663 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 81 for LOIs [2023-04-01 08:40:15,775 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:40:17,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1520#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_main_~#set~0.base_BEFORE_CALL_47| Int) (|v_old(#length)_BEFORE_CALL_47| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_47| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_47| (Array Int Int))) (and (not (= (select |v_old(#memory_int)_BEFORE_CALL_47| 1) |v_old(#valid)_BEFORE_CALL_47|)) (= 2 (select |v_old(#length)_BEFORE_CALL_47| 1)) (= (select |v_old(#valid)_BEFORE_CALL_47| |v_main_~#set~0.base_BEFORE_CALL_47|) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_47| 1) 1) 0) (not (= |v_main_~#set~0.base_BEFORE_CALL_47| |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_47| |v_old(#length)_BEFORE_CALL_47|)) (= 42 (select |v_old(#length)_BEFORE_CALL_47| 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_47| 1) 0) 48) (= (select |v_old(#valid)_BEFORE_CALL_47| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_47| 0) 0) (not (= |v_main_~#set~0.base_BEFORE_CALL_47| 0)) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_47|) 4) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_47|) 0)) (not (= |v_main_~#set~0.base_BEFORE_CALL_47| 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_47| 1) |v_old(#length)_BEFORE_CALL_47|)) (= (select |v_old(#valid)_BEFORE_CALL_47| 1) 1) (not (= |v_main_~#set~0.base_BEFORE_CALL_47| 2)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:40:17,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:40:17,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:40:17,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 08:40:17,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953073750] [2023-04-01 08:40:17,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:40:17,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 08:40:17,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:40:17,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 08:40:17,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=850, Unknown=1, NotChecked=0, Total=992 [2023-04-01 08:40:17,906 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 08:40:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:40:17,967 INFO L93 Difference]: Finished difference Result 132 states and 172 transitions. [2023-04-01 08:40:17,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:40:17,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2023-04-01 08:40:17,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:40:17,968 INFO L225 Difference]: With dead ends: 132 [2023-04-01 08:40:17,968 INFO L226 Difference]: Without dead ends: 79 [2023-04-01 08:40:17,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=141, Invalid=850, Unknown=1, NotChecked=0, Total=992 [2023-04-01 08:40:17,970 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:40:17,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 71 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:40:17,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-01 08:40:17,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2023-04-01 08:40:17,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 47 states have internal predecessors, (59), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-04-01 08:40:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2023-04-01 08:40:17,985 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 40 [2023-04-01 08:40:17,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:40:17,985 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2023-04-01 08:40:17,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 08:40:17,986 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2023-04-01 08:40:17,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 08:40:17,987 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:40:17,987 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:40:17,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 08:40:18,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:40:18,193 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:40:18,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:40:18,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2107176067, now seen corresponding path program 2 times [2023-04-01 08:40:18,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:40:18,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98663295] [2023-04-01 08:40:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:40:18,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:40:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:40:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 08:40:18,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:40:18,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98663295] [2023-04-01 08:40:18,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98663295] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:40:18,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098239786] [2023-04-01 08:40:18,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:40:18,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:40:18,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:40:18,309 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) [2023-04-01 08:40:18,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 08:40:18,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 08:40:18,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:40:18,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:40:18,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:40:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 08:40:18,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:40:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 08:40:18,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098239786] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:40:18,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [622815231] [2023-04-01 08:40:18,410 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 08:40:18,410 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:40:18,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:40:18,411 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:40:18,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:40:18,432 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:40:20,709 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2023-04-01 08:40:20,733 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 81 for LOIs [2023-04-01 08:40:20,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:40:20,761 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 81 for LOIs [2023-04-01 08:40:20,862 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:40:22,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2104#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_main_~#set~0.base_BEFORE_CALL_84| Int) (|v_old(#length)_BEFORE_CALL_84| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_84| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_84| (Array Int Int))) (and (not (= |v_main_~#set~0.base_BEFORE_CALL_84| 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_84| 1) 1) 0) (= 2 (select |v_old(#length)_BEFORE_CALL_84| 1)) (not (= |v_main_~#set~0.base_BEFORE_CALL_84| |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_84| 1) 1) (= 42 (select |v_old(#length)_BEFORE_CALL_84| 2)) (= (select |v_old(#valid)_BEFORE_CALL_84| 0) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_84| 1) |v_old(#valid)_BEFORE_CALL_84|)) (not (= |v_main_~#set~0.base_BEFORE_CALL_84| 1)) (not (= |v_main_~#set~0.base_BEFORE_CALL_84| 2)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_84| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_84| |v_main_~#set~0.base_BEFORE_CALL_84|) 0) (not (= |v_old(#valid)_BEFORE_CALL_84| |v_old(#length)_BEFORE_CALL_84|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_84| 1) |v_old(#length)_BEFORE_CALL_84|)) (= (select |v_old(#valid)_BEFORE_CALL_84| 2) 1) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_84|) 0) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_84|) 4)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:40:22,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:40:22,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:40:22,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 08:40:22,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603616282] [2023-04-01 08:40:22,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:40:22,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 08:40:22,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:40:22,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 08:40:22,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2023-04-01 08:40:22,916 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 08:40:23,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:40:23,010 INFO L93 Difference]: Finished difference Result 161 states and 210 transitions. [2023-04-01 08:40:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:40:23,011 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2023-04-01 08:40:23,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:40:23,012 INFO L225 Difference]: With dead ends: 161 [2023-04-01 08:40:23,012 INFO L226 Difference]: Without dead ends: 111 [2023-04-01 08:40:23,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2023-04-01 08:40:23,013 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:40:23,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 112 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:40:23,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-01 08:40:23,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2023-04-01 08:40:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 77 states have internal predecessors, (94), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (21), 18 states have call predecessors, (21), 17 states have call successors, (21) [2023-04-01 08:40:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 133 transitions. [2023-04-01 08:40:23,036 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 133 transitions. Word has length 43 [2023-04-01 08:40:23,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:40:23,037 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 133 transitions. [2023-04-01 08:40:23,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 08:40:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 133 transitions. [2023-04-01 08:40:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 08:40:23,039 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:40:23,039 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:40:23,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 08:40:23,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:40:23,245 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:40:23,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:40:23,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1247403734, now seen corresponding path program 3 times [2023-04-01 08:40:23,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:40:23,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456341627] [2023-04-01 08:40:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:40:23,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:40:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:40:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 08:40:23,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:40:23,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456341627] [2023-04-01 08:40:23,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456341627] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:40:23,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840899594] [2023-04-01 08:40:23,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:40:23,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:40:23,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:40:23,380 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) [2023-04-01 08:40:23,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 08:40:23,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:40:23,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:40:23,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 08:40:23,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:40:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-04-01 08:40:23,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:40:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 34 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-04-01 08:40:23,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840899594] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:40:23,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1525128218] [2023-04-01 08:40:23,624 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 08:40:23,624 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:40:23,624 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:40:23,624 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:40:23,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:40:23,649 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:40:25,749 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2023-04-01 08:40:25,772 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 81 for LOIs [2023-04-01 08:40:25,799 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:40:25,802 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 81 for LOIs [2023-04-01 08:40:25,926 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:40:28,199 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2911#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((|v_old(#valid)_BEFORE_CALL_121| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_121| (Array Int Int)) (|v_main_~#set~0.base_BEFORE_CALL_121| Int) (|v_old(#memory_int)_BEFORE_CALL_121| (Array Int (Array Int Int)))) (and (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_121| 1) 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_121| 1) |v_old(#length)_BEFORE_CALL_121|)) (not (= |v_main_~#set~0.base_BEFORE_CALL_121| 2)) (not (= |v_main_~#set~0.base_BEFORE_CALL_121| |#StackHeapBarrier|)) (= 1 (select |v_old(#valid)_BEFORE_CALL_121| 1)) (= 0 (select |v_old(#valid)_BEFORE_CALL_121| |v_main_~#set~0.base_BEFORE_CALL_121|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_121| 1) |v_old(#valid)_BEFORE_CALL_121|)) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_121|) 0) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_121|) 4)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_121| 1) 1) 0) (not (= |v_main_~#set~0.base_BEFORE_CALL_121| 1)) (not (= |v_main_~#set~0.base_BEFORE_CALL_121| 0)) (= (select |v_old(#valid)_BEFORE_CALL_121| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_121| |v_old(#length)_BEFORE_CALL_121|)) (= (select |v_old(#valid)_BEFORE_CALL_121| 2) 1) (= 42 (select |v_old(#length)_BEFORE_CALL_121| 2)) (= 2 (select |v_old(#length)_BEFORE_CALL_121| 1)))) (= |#NULL.base| 0))' at error location [2023-04-01 08:40:28,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:40:28,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:40:28,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 11 [2023-04-01 08:40:28,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96734167] [2023-04-01 08:40:28,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:40:28,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 08:40:28,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:40:28,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 08:40:28,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 08:40:28,202 INFO L87 Difference]: Start difference. First operand 103 states and 133 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 08:40:28,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:40:28,544 INFO L93 Difference]: Finished difference Result 161 states and 217 transitions. [2023-04-01 08:40:28,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 08:40:28,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2023-04-01 08:40:28,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:40:28,545 INFO L225 Difference]: With dead ends: 161 [2023-04-01 08:40:28,546 INFO L226 Difference]: Without dead ends: 111 [2023-04-01 08:40:28,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2023-04-01 08:40:28,547 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:40:28,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 217 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:40:28,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-01 08:40:28,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 86. [2023-04-01 08:40:28,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2023-04-01 08:40:28,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2023-04-01 08:40:28,573 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 64 [2023-04-01 08:40:28,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:40:28,573 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2023-04-01 08:40:28,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 08:40:28,574 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2023-04-01 08:40:28,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-01 08:40:28,575 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:40:28,576 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:40:28,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 08:40:28,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:40:28,782 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:40:28,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:40:28,783 INFO L85 PathProgramCache]: Analyzing trace with hash 401628486, now seen corresponding path program 1 times [2023-04-01 08:40:28,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:40:28,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520430276] [2023-04-01 08:40:28,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:40:28,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:40:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:40:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-01 08:40:28,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:40:28,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520430276] [2023-04-01 08:40:28,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520430276] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:40:28,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77786149] [2023-04-01 08:40:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:40:28,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:40:28,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:40:28,910 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:40:28,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 08:40:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:40:29,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 08:40:29,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:40:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-01 08:40:29,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:40:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-01 08:40:29,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77786149] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:40:29,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [864957385] [2023-04-01 08:40:29,119 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 08:40:29,119 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:40:29,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:40:29,120 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:40:29,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:40:29,139 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:40:30,639 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2023-04-01 08:40:30,656 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 81 for LOIs [2023-04-01 08:40:30,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:40:30,674 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 81 for LOIs [2023-04-01 08:40:30,755 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:40:32,706 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3784#(and (exists ((|v_old(#length)_BEFORE_CALL_142| (Array Int Int)) (|v_old(#valid)_BEFORE_CALL_142| (Array Int Int)) (|v_main_~#set~0.base_BEFORE_CALL_142| Int) (|v_old(#memory_int)_BEFORE_CALL_142| (Array Int (Array Int Int)))) (and (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_142| 1) 0)) (= (select |v_old(#length)_BEFORE_CALL_142| 2) 42) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_142|) 0) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_142|) 4)) (= (select |v_old(#valid)_BEFORE_CALL_142| 0) 0) (not (= |v_main_~#set~0.base_BEFORE_CALL_142| 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_142| 1) |v_old(#length)_BEFORE_CALL_142|)) (not (= |v_old(#valid)_BEFORE_CALL_142| |v_old(#length)_BEFORE_CALL_142|)) (= 2 (select |v_old(#length)_BEFORE_CALL_142| 1)) (= (select |v_old(#valid)_BEFORE_CALL_142| |v_main_~#set~0.base_BEFORE_CALL_142|) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_142| 1) 1) 0) (not (= |v_main_~#set~0.base_BEFORE_CALL_142| |#StackHeapBarrier|)) (not (= |v_main_~#set~0.base_BEFORE_CALL_142| 0)) (= (select |v_old(#valid)_BEFORE_CALL_142| 2) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_142| 1) |v_old(#valid)_BEFORE_CALL_142|)) (= (select |v_old(#valid)_BEFORE_CALL_142| 1) 1) (not (= |v_main_~#set~0.base_BEFORE_CALL_142| 1)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:40:32,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:40:32,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:40:32,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-01 08:40:32,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726345758] [2023-04-01 08:40:32,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:40:32,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 08:40:32,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:40:32,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 08:40:32,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1138, Unknown=1, NotChecked=0, Total=1406 [2023-04-01 08:40:32,708 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 08:40:32,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:40:32,799 INFO L93 Difference]: Finished difference Result 208 states and 273 transitions. [2023-04-01 08:40:32,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 08:40:32,800 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 76 [2023-04-01 08:40:32,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:40:32,801 INFO L225 Difference]: With dead ends: 208 [2023-04-01 08:40:32,801 INFO L226 Difference]: Without dead ends: 132 [2023-04-01 08:40:32,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=267, Invalid=1138, Unknown=1, NotChecked=0, Total=1406 [2023-04-01 08:40:32,802 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 92 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:40:32,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 55 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:40:32,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-04-01 08:40:32,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 92. [2023-04-01 08:40:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.144927536231884) internal successors, (79), 70 states have internal predecessors, (79), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2023-04-01 08:40:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2023-04-01 08:40:32,821 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 76 [2023-04-01 08:40:32,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:40:32,821 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2023-04-01 08:40:32,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 08:40:32,822 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2023-04-01 08:40:32,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-01 08:40:32,823 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:40:32,823 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:40:32,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 08:40:33,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:40:33,025 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:40:33,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:40:33,025 INFO L85 PathProgramCache]: Analyzing trace with hash 219550182, now seen corresponding path program 2 times [2023-04-01 08:40:33,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:40:33,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525234995] [2023-04-01 08:40:33,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:40:33,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:40:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:40:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-01 08:40:33,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:40:33,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525234995] [2023-04-01 08:40:33,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525234995] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:40:33,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950964523] [2023-04-01 08:40:33,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:40:33,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:40:33,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:40:33,291 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:40:33,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 08:40:33,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 08:40:33,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:40:33,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 08:40:33,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:40:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-04-01 08:40:33,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:40:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-04-01 08:40:33,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950964523] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:40:33,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [611278081] [2023-04-01 08:40:33,588 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 08:40:33,588 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:40:33,589 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:40:33,589 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:40:33,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:40:33,611 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:40:34,967 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2023-04-01 08:40:34,983 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 81 for LOIs [2023-04-01 08:40:35,003 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:40:35,007 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 81 for LOIs [2023-04-01 08:40:35,094 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:40:37,224 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4789#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0) (exists ((|v_old(#length)_BEFORE_CALL_167| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_167| (Array Int (Array Int Int))) (|v_main_~#set~0.base_BEFORE_CALL_167| Int) (|v_old(#valid)_BEFORE_CALL_167| (Array Int Int))) (and (not (= |v_main_~#set~0.base_BEFORE_CALL_167| 2)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_167| 1) 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_167| 1) |v_old(#length)_BEFORE_CALL_167|)) (= 0 (select |v_old(#valid)_BEFORE_CALL_167| |v_main_~#set~0.base_BEFORE_CALL_167|)) (not (= |v_old(#valid)_BEFORE_CALL_167| |v_old(#length)_BEFORE_CALL_167|)) (not (= |v_main_~#set~0.base_BEFORE_CALL_167| |#StackHeapBarrier|)) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_167|) 4) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_167|) 0)) (= 2 (select |v_old(#length)_BEFORE_CALL_167| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_167| 1) 1) 0) (= (select |v_old(#length)_BEFORE_CALL_167| 2) 42) (= (select |v_old(#valid)_BEFORE_CALL_167| 0) 0) (not (= |v_main_~#set~0.base_BEFORE_CALL_167| 1)) (= (select |v_old(#valid)_BEFORE_CALL_167| 1) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_167| 1) |v_old(#valid)_BEFORE_CALL_167|)) (= (select |v_old(#valid)_BEFORE_CALL_167| 2) 1) (not (= |v_main_~#set~0.base_BEFORE_CALL_167| 0)))))' at error location [2023-04-01 08:40:37,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:40:37,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:40:37,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 23 [2023-04-01 08:40:37,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909334659] [2023-04-01 08:40:37,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:40:37,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 08:40:37,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:40:37,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 08:40:37,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1924, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 08:40:37,227 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 08:40:37,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:40:37,753 INFO L93 Difference]: Finished difference Result 309 states and 414 transitions. [2023-04-01 08:40:37,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 08:40:37,754 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 82 [2023-04-01 08:40:37,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:40:37,756 INFO L225 Difference]: With dead ends: 309 [2023-04-01 08:40:37,756 INFO L226 Difference]: Without dead ends: 233 [2023-04-01 08:40:37,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=562, Invalid=2744, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 08:40:37,758 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 477 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 08:40:37,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 155 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 08:40:37,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-04-01 08:40:37,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 183. [2023-04-01 08:40:37,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 136 states have (on average 1.0735294117647058) internal successors, (146), 137 states have internal predecessors, (146), 39 states have call successors, (39), 7 states have call predecessors, (39), 7 states have return successors, (48), 38 states have call predecessors, (48), 38 states have call successors, (48) [2023-04-01 08:40:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 233 transitions. [2023-04-01 08:40:37,796 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 233 transitions. Word has length 82 [2023-04-01 08:40:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:40:37,797 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 233 transitions. [2023-04-01 08:40:37,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 08:40:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 233 transitions. [2023-04-01 08:40:37,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-01 08:40:37,799 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:40:37,799 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:40:37,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 08:40:38,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 08:40:38,011 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:40:38,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:40:38,012 INFO L85 PathProgramCache]: Analyzing trace with hash -557369507, now seen corresponding path program 3 times [2023-04-01 08:40:38,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:40:38,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846085357] [2023-04-01 08:40:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:40:38,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:40:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:40:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2023-04-01 08:40:38,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:40:38,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846085357] [2023-04-01 08:40:38,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846085357] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:40:38,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009302799] [2023-04-01 08:40:38,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:40:38,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:40:38,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:40:38,440 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:40:38,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 08:40:38,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:40:38,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:40:38,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 08:40:38,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:40:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2023-04-01 08:40:39,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:40:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2023-04-01 08:40:39,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009302799] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:40:39,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1858688984] [2023-04-01 08:40:39,440 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 08:40:39,440 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:40:39,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:40:39,441 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:40:39,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:40:39,464 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:40:40,823 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2023-04-01 08:40:40,839 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 81 for LOIs [2023-04-01 08:40:40,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:40:40,857 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 81 for LOIs [2023-04-01 08:40:40,943 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:40:43,317 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6620#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((|v_main_~#set~0.base_BEFORE_CALL_192| Int) (|v_old(#valid)_BEFORE_CALL_192| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_192| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_192| (Array Int (Array Int Int)))) (and (= (select |v_old(#length)_BEFORE_CALL_192| 2) 42) (not (= |v_main_~#set~0.base_BEFORE_CALL_192| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_192| 1) 0) 48) (not (= |v_old(#valid)_BEFORE_CALL_192| |v_old(#length)_BEFORE_CALL_192|)) (= (select |v_old(#length)_BEFORE_CALL_192| 1) 2) (not (= |v_old(#valid)_BEFORE_CALL_192| (select |v_old(#memory_int)_BEFORE_CALL_192| 1))) (= (select |v_old(#valid)_BEFORE_CALL_192| |v_main_~#set~0.base_BEFORE_CALL_192|) 0) (= (select |v_old(#valid)_BEFORE_CALL_192| 2) 1) (not (= |v_main_~#set~0.base_BEFORE_CALL_192| 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_192| 1) |v_old(#length)_BEFORE_CALL_192|)) (not (= |v_main_~#set~0.base_BEFORE_CALL_192| |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_192| 0) 0) (= (select |v_old(#valid)_BEFORE_CALL_192| 1) 1) (not (= |v_main_~#set~0.base_BEFORE_CALL_192| 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_192| 1) 1) 0) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_192|) 4) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_192|) 0)))) (= |#NULL.base| 0))' at error location [2023-04-01 08:40:43,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:40:43,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:40:43,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2023-04-01 08:40:43,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100932464] [2023-04-01 08:40:43,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:40:43,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-04-01 08:40:43,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:40:43,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-04-01 08:40:43,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=3094, Unknown=0, NotChecked=0, Total=3660 [2023-04-01 08:40:43,321 INFO L87 Difference]: Start difference. First operand 183 states and 233 transitions. Second operand has 36 states, 36 states have (on average 3.9722222222222223) internal successors, (143), 36 states have internal predecessors, (143), 22 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 22 states have call predecessors, (43), 22 states have call successors, (43) [2023-04-01 08:40:44,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:40:44,274 INFO L93 Difference]: Finished difference Result 584 states and 793 transitions. [2023-04-01 08:40:44,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-04-01 08:40:44,274 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.9722222222222223) internal successors, (143), 36 states have internal predecessors, (143), 22 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 22 states have call predecessors, (43), 22 states have call successors, (43) Word has length 167 [2023-04-01 08:40:44,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:40:44,281 INFO L225 Difference]: With dead ends: 584 [2023-04-01 08:40:44,281 INFO L226 Difference]: Without dead ends: 418 [2023-04-01 08:40:44,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1358, Invalid=5448, Unknown=0, NotChecked=0, Total=6806 [2023-04-01 08:40:44,284 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 775 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 08:40:44,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 162 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 08:40:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2023-04-01 08:40:44,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 364. [2023-04-01 08:40:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 269 states have (on average 1.037174721189591) internal successors, (279), 270 states have internal predecessors, (279), 87 states have call successors, (87), 7 states have call predecessors, (87), 7 states have return successors, (108), 86 states have call predecessors, (108), 86 states have call successors, (108) [2023-04-01 08:40:44,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 474 transitions. [2023-04-01 08:40:44,366 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 474 transitions. Word has length 167 [2023-04-01 08:40:44,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:40:44,367 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 474 transitions. [2023-04-01 08:40:44,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.9722222222222223) internal successors, (143), 36 states have internal predecessors, (143), 22 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 22 states have call predecessors, (43), 22 states have call successors, (43) [2023-04-01 08:40:44,367 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 474 transitions. [2023-04-01 08:40:44,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2023-04-01 08:40:44,372 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:40:44,372 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:40:44,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 08:40:44,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 08:40:44,580 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:40:44,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:40:44,581 INFO L85 PathProgramCache]: Analyzing trace with hash -845540730, now seen corresponding path program 4 times [2023-04-01 08:40:44,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:40:44,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455503821] [2023-04-01 08:40:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:40:44,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:40:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:40:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3356 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3278 trivial. 0 not checked. [2023-04-01 08:40:45,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:40:45,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455503821] [2023-04-01 08:40:45,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455503821] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:40:45,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16349584] [2023-04-01 08:40:45,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:40:45,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:40:45,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:40:45,380 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:40:45,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 08:40:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:40:45,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 08:40:45,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:40:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3356 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3278 trivial. 0 not checked. [2023-04-01 08:40:45,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:40:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3356 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3278 trivial. 0 not checked. [2023-04-01 08:40:46,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16349584] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:40:46,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1275304631] [2023-04-01 08:40:46,129 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 08:40:46,129 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:40:46,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:40:46,129 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:40:46,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:40:46,147 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:40:47,355 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2023-04-01 08:40:47,371 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 81 for LOIs [2023-04-01 08:40:47,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:40:47,388 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 81 for LOIs [2023-04-01 08:40:47,480 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:40:49,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10175#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((|v_main_~#set~0.base_BEFORE_CALL_217| Int) (|v_old(#memory_int)_BEFORE_CALL_217| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_217| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_217| (Array Int Int))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_217| 1) 1) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_217| 1) |v_old(#length)_BEFORE_CALL_217|)) (not (= |v_main_~#set~0.base_BEFORE_CALL_217| 1)) (not (= |v_main_~#set~0.base_BEFORE_CALL_217| |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_217| 0) 0) (= 42 (select |v_old(#length)_BEFORE_CALL_217| 2)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_217| 1) 0)) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_217|) 4) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_217|) 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_217| 1) |v_old(#valid)_BEFORE_CALL_217|)) (not (= |v_old(#valid)_BEFORE_CALL_217| |v_old(#length)_BEFORE_CALL_217|)) (not (= |v_main_~#set~0.base_BEFORE_CALL_217| 2)) (= (select |v_old(#length)_BEFORE_CALL_217| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_217| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_217| |v_main_~#set~0.base_BEFORE_CALL_217|) 0) (= (select |v_old(#valid)_BEFORE_CALL_217| 1) 1) (not (= |v_main_~#set~0.base_BEFORE_CALL_217| 0)))) (= |#NULL.base| 0))' at error location [2023-04-01 08:40:49,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:40:49,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:40:49,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2023-04-01 08:40:49,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450605892] [2023-04-01 08:40:49,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:40:49,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-01 08:40:49,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:40:49,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-01 08:40:49,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=2090, Unknown=1, NotChecked=0, Total=2862 [2023-04-01 08:40:49,603 INFO L87 Difference]: Start difference. First operand 364 states and 474 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 08:40:49,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:40:49,891 INFO L93 Difference]: Finished difference Result 828 states and 1113 transitions. [2023-04-01 08:40:49,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-01 08:40:49,892 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 336 [2023-04-01 08:40:49,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:40:49,894 INFO L225 Difference]: With dead ends: 828 [2023-04-01 08:40:49,894 INFO L226 Difference]: Without dead ends: 482 [2023-04-01 08:40:49,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1022 GetRequests, 970 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=771, Invalid=2090, Unknown=1, NotChecked=0, Total=2862 [2023-04-01 08:40:49,897 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 301 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 08:40:49,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 55 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 08:40:49,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-04-01 08:40:49,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 378. [2023-04-01 08:40:49,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 283 states have (on average 1.0353356890459364) internal successors, (293), 284 states have internal predecessors, (293), 87 states have call successors, (87), 7 states have call predecessors, (87), 7 states have return successors, (108), 86 states have call predecessors, (108), 86 states have call successors, (108) [2023-04-01 08:40:49,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 488 transitions. [2023-04-01 08:40:49,973 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 488 transitions. Word has length 336 [2023-04-01 08:40:49,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:40:49,974 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 488 transitions. [2023-04-01 08:40:49,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 08:40:49,974 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 488 transitions. [2023-04-01 08:40:49,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-04-01 08:40:49,979 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:40:49,979 INFO L195 NwaCegarLoop]: trace histogram [26, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:40:49,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 08:40:50,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 08:40:50,186 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:40:50,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:40:50,187 INFO L85 PathProgramCache]: Analyzing trace with hash 128926374, now seen corresponding path program 5 times [2023-04-01 08:40:50,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:40:50,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15371194] [2023-04-01 08:40:50,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:40:50,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:40:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:40:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 3278 trivial. 0 not checked. [2023-04-01 08:40:51,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:40:51,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15371194] [2023-04-01 08:40:51,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15371194] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:40:51,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259603202] [2023-04-01 08:40:51,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:40:51,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:40:51,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:40:51,533 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:40:51,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process