/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 13:54:11,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 13:54:11,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 13:54:11,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 13:54:11,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 13:54:11,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 13:54:11,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 13:54:11,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 13:54:11,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 13:54:11,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 13:54:11,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 13:54:11,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 13:54:11,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 13:54:11,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 13:54:11,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 13:54:11,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 13:54:11,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 13:54:11,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 13:54:11,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 13:54:11,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 13:54:11,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 13:54:11,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 13:54:11,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 13:54:11,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 13:54:11,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 13:54:11,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 13:54:11,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 13:54:11,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 13:54:11,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 13:54:11,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 13:54:11,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 13:54:11,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 13:54:11,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 13:54:11,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 13:54:11,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 13:54:11,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 13:54:11,602 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 [2023-04-02 13:54:11,634 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 13:54:11,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 13:54:11,635 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 13:54:11,635 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 13:54:11,635 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 13:54:11,636 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 13:54:11,636 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 13:54:11,636 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 13:54:11,636 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 13:54:11,636 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 13:54:11,637 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 13:54:11,637 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 13:54:11,637 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 13:54:11,637 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 13:54:11,637 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 13:54:11,638 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 13:54:11,638 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 13:54:11,638 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 13:54:11,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 13:54:11,639 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 13:54:11,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 13:54:11,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 13:54:11,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 13:54:11,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 13:54:11,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 13:54:11,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 13:54:11,640 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 13:54:11,640 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 13:54:11,640 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 13:54:11,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 13:54:11,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 13:54:11,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 13:54:11,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 13:54:11,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 13:54:11,641 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 13:54:11,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 13:54:11,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 13:54:11,641 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 13:54:11,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 13:54:11,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 13:54:11,642 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 13:54:11,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 13:54:11,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 13:54:11,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 13:54:11,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 13:54:11,904 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 13:54:11,904 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 13:54:11,905 INFO L432 ainManager$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 [2023-04-02 13:54:13,041 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 13:54:13,228 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 13:54:13,230 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2023-04-02 13:54:13,235 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd10f3730/9d08eed0472a4ab9af5f8f991152f130/FLAGdd2feaac8 [2023-04-02 13:54:13,248 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd10f3730/9d08eed0472a4ab9af5f8f991152f130 [2023-04-02 13:54:13,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 13:54:13,251 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 13:54:13,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 13:54:13,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 13:54:13,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 13:54:13,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f215d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13, skipping insertion in model container [2023-04-02 13:54:13,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 13:54:13,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 13:54:13,395 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2023-04-02 13:54:13,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 13:54:13,454 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 13:54:13,467 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] [2023-04-02 13:54:13,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 13:54:13,490 INFO L208 MainTranslator]: Completed translation [2023-04-02 13:54:13,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13 WrapperNode [2023-04-02 13:54:13,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 13:54:13,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 13:54:13,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 13:54:13,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 13:54:13,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,520 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 13:54:13,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 13:54:13,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 13:54:13,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 13:54:13,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 13:54:13,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:13,558 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) [2023-04-02 13:54:13,560 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 [2023-04-02 13:54:13,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 13:54:13,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 13:54:13,597 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 13:54:13,600 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 13:54:13,600 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2023-04-02 13:54:13,601 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2023-04-02 13:54:13,601 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 13:54:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 13:54:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 13:54:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 13:54:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 13:54:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 13:54:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 13:54:13,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 13:54:13,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 13:54:13,602 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2023-04-02 13:54:13,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 13:54:13,602 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2023-04-02 13:54:13,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 13:54:13,602 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 13:54:13,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 13:54:13,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 13:54:13,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 13:54:13,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 13:54:13,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 13:54:13,667 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 13:54:13,669 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 13:54:13,908 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 13:54:13,973 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 13:54:13,973 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-04-02 13:54:13,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:54:13 BoogieIcfgContainer [2023-04-02 13:54:13,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 13:54:13,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 13:54:13,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 13:54:13,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 13:54:13,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:54:13" (1/3) ... [2023-04-02 13:54:13,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32735fe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:54:13, skipping insertion in model container [2023-04-02 13:54:13,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (2/3) ... [2023-04-02 13:54:13,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32735fe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:54:13, skipping insertion in model container [2023-04-02 13:54:13,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:54:13" (3/3) ... [2023-04-02 13:54:13,987 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2023-04-02 13:54:14,008 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 13:54:14,009 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 13:54:14,053 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 13:54:14,058 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;@68f9c0f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 13:54:14,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 13:54:14,061 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) [2023-04-02 13:54:14,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 13:54:14,066 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:14,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:14,067 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:14,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:14,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1516028163, now seen corresponding path program 1 times [2023-04-02 13:54:14,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:14,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526007311] [2023-04-02 13:54:14,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:14,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 13:54:14,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:14,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526007311] [2023-04-02 13:54:14,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526007311] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:54:14,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 13:54:14,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 13:54:14,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296944811] [2023-04-02 13:54:14,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:54:14,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 13:54:14,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:14,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 13:54:14,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:54:14,308 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) [2023-04-02 13:54:14,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:14,402 INFO L93 Difference]: Finished difference Result 88 states and 125 transitions. [2023-04-02 13:54:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 13:54:14,404 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 [2023-04-02 13:54:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:14,410 INFO L225 Difference]: With dead ends: 88 [2023-04-02 13:54:14,411 INFO L226 Difference]: Without dead ends: 52 [2023-04-02 13:54:14,413 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 [2023-04-02 13:54:14,416 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, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:14,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 58 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:54:14,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-02 13:54:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2023-04-02 13:54:14,450 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) [2023-04-02 13:54:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-04-02 13:54:14,453 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 12 [2023-04-02 13:54:14,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:14,453 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-04-02 13:54:14,453 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) [2023-04-02 13:54:14,453 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-04-02 13:54:14,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 13:54:14,454 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:14,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:14,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 13:54:14,455 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:14,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:14,455 INFO L85 PathProgramCache]: Analyzing trace with hash -68675596, now seen corresponding path program 1 times [2023-04-02 13:54:14,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:14,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611045369] [2023-04-02 13:54:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:14,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 13:54:14,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:14,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611045369] [2023-04-02 13:54:14,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611045369] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:14,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489324459] [2023-04-02 13:54:14,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:14,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:14,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:14,591 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) [2023-04-02 13:54:14,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 13:54:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:14,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 13:54:14,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 13:54:14,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 13:54:14,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489324459] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:14,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1162880546] [2023-04-02 13:54:14,735 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 13:54:14,735 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:14,740 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:14,743 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:14,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:14,809 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:14,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:14,944 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:15,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1162880546] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:54:15,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:15,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4, 4] total 13 [2023-04-02 13:54:15,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440174136] [2023-04-02 13:54:15,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:54:15,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 13:54:15,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:15,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 13:54:15,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-04-02 13:54:15,084 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) [2023-04-02 13:54:15,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:15,647 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2023-04-02 13:54:15,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 13:54:15,647 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 [2023-04-02 13:54:15,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:15,651 INFO L225 Difference]: With dead ends: 84 [2023-04-02 13:54:15,651 INFO L226 Difference]: Without dead ends: 53 [2023-04-02 13:54:15,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-04-02 13:54:15,655 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 113 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:15,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 5 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 13:54:15,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-02 13:54:15,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2023-04-02 13:54:15,681 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) [2023-04-02 13:54:15,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2023-04-02 13:54:15,687 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 13 [2023-04-02 13:54:15,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:15,687 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2023-04-02 13:54:15,688 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) [2023-04-02 13:54:15,688 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2023-04-02 13:54:15,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 13:54:15,689 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:15,689 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] [2023-04-02 13:54:15,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:15,896 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 [2023-04-02 13:54:15,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:15,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:15,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1059173312, now seen corresponding path program 1 times [2023-04-02 13:54:15,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:15,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689592389] [2023-04-02 13:54:15,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:15,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:54:16,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:16,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689592389] [2023-04-02 13:54:16,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689592389] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:16,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549752169] [2023-04-02 13:54:16,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:16,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:16,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:16,031 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) [2023-04-02 13:54:16,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 13:54:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:16,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 13:54:16,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 13:54:16,118 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 13:54:16,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549752169] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:54:16,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 13:54:16,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-02 13:54:16,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328007667] [2023-04-02 13:54:16,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:54:16,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 13:54:16,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:16,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 13:54:16,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 13:54:16,121 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) [2023-04-02 13:54:16,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:16,168 INFO L93 Difference]: Finished difference Result 81 states and 102 transitions. [2023-04-02 13:54:16,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 13:54:16,169 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 [2023-04-02 13:54:16,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:16,171 INFO L225 Difference]: With dead ends: 81 [2023-04-02 13:54:16,171 INFO L226 Difference]: Without dead ends: 47 [2023-04-02 13:54:16,171 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 [2023-04-02 13:54:16,174 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 [2023-04-02 13:54:16,179 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] [2023-04-02 13:54:16,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-02 13:54:16,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2023-04-02 13:54:16,195 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) [2023-04-02 13:54:16,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2023-04-02 13:54:16,197 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 29 [2023-04-02 13:54:16,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:16,197 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2023-04-02 13:54:16,197 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) [2023-04-02 13:54:16,197 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2023-04-02 13:54:16,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-02 13:54:16,199 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:16,199 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] [2023-04-02 13:54:16,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:16,405 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 [2023-04-02 13:54:16,405 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:16,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:16,406 INFO L85 PathProgramCache]: Analyzing trace with hash -427584065, now seen corresponding path program 1 times [2023-04-02 13:54:16,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:16,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332201542] [2023-04-02 13:54:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:16,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 13:54:16,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:16,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332201542] [2023-04-02 13:54:16,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332201542] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:16,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643085875] [2023-04-02 13:54:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:16,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:16,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:16,501 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) [2023-04-02 13:54:16,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 13:54:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:16,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 13:54:16,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 13:54:16,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 13:54:16,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643085875] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:16,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1589977536] [2023-04-02 13:54:16,619 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-04-02 13:54:16,619 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:16,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:16,619 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:16,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:16,644 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:17,304 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 24 for LOIs [2023-04-02 13:54:17,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:17,319 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 24 for LOIs [2023-04-02 13:54:17,353 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:18,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1589977536] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:54:18,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:18,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [4, 4, 4] total 24 [2023-04-02 13:54:18,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592069653] [2023-04-02 13:54:18,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:54:18,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 13:54:18,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:18,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 13:54:18,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2023-04-02 13:54:18,171 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 19 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 12 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) [2023-04-02 13:54:19,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:19,962 INFO L93 Difference]: Finished difference Result 124 states and 162 transitions. [2023-04-02 13:54:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 13:54:19,962 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 12 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 [2023-04-02 13:54:19,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:19,963 INFO L225 Difference]: With dead ends: 124 [2023-04-02 13:54:19,963 INFO L226 Difference]: Without dead ends: 95 [2023-04-02 13:54:19,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=386, Invalid=1506, Unknown=0, NotChecked=0, Total=1892 [2023-04-02 13:54:19,965 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 238 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:19,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 9 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 13:54:19,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-04-02 13:54:19,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 61. [2023-04-02 13:54:19,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 43 states have (on average 1.302325581395349) internal successors, (56), 45 states have internal predecessors, (56), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2023-04-02 13:54:19,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2023-04-02 13:54:19,985 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 30 [2023-04-02 13:54:19,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:19,985 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2023-04-02 13:54:19,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 12 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) [2023-04-02 13:54:19,985 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2023-04-02 13:54:19,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 13:54:19,986 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:19,986 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] [2023-04-02 13:54:19,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:20,199 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 [2023-04-02 13:54:20,200 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:20,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:20,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1006294764, now seen corresponding path program 1 times [2023-04-02 13:54:20,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:20,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240114203] [2023-04-02 13:54:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:20,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 13:54:20,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:20,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240114203] [2023-04-02 13:54:20,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240114203] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:20,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131543750] [2023-04-02 13:54:20,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:20,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:20,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:20,275 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) [2023-04-02 13:54:20,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 13:54:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:20,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 13:54:20,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 13:54:20,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 13:54:20,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131543750] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:20,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2139361639] [2023-04-02 13:54:20,391 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 13:54:20,392 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:20,392 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:20,392 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:20,392 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:20,411 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:21,395 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 13:54:21,409 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 40 for LOIs [2023-04-02 13:54:21,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:21,419 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 30 for LOIs [2023-04-02 13:54:21,504 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:23,181 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1559#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0) (exists ((|v_main_~#set~0.base_BEFORE_CALL_35| Int)) (and (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_35|) 0) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_35|) 4)) (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_35| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_35|) (<= 2 |v_main_~#set~0.base_BEFORE_CALL_35|))))' at error location [2023-04-02 13:54:23,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:23,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:23,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 13:54:23,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226079166] [2023-04-02 13:54:23,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:23,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 13:54:23,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:23,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 13:54:23,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2023-04-02 13:54:23,184 INFO L87 Difference]: Start difference. First operand 61 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) [2023-04-02 13:54:23,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:23,253 INFO L93 Difference]: Finished difference Result 134 states and 178 transitions. [2023-04-02 13:54:23,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 13:54:23,253 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 [2023-04-02 13:54:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:23,255 INFO L225 Difference]: With dead ends: 134 [2023-04-02 13:54:23,255 INFO L226 Difference]: Without dead ends: 80 [2023-04-02 13:54:23,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2023-04-02 13:54:23,257 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:23,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 56 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:23,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-04-02 13:54:23,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2023-04-02 13:54:23,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 48 states have internal predecessors, (59), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2023-04-02 13:54:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2023-04-02 13:54:23,282 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 40 [2023-04-02 13:54:23,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:23,282 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2023-04-02 13:54:23,282 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) [2023-04-02 13:54:23,282 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2023-04-02 13:54:23,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-02 13:54:23,283 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:23,283 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] [2023-04-02 13:54:23,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:23,488 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 [2023-04-02 13:54:23,488 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:23,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:23,489 INFO L85 PathProgramCache]: Analyzing trace with hash 2107176067, now seen corresponding path program 2 times [2023-04-02 13:54:23,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:23,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310055371] [2023-04-02 13:54:23,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:23,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 13:54:23,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:23,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310055371] [2023-04-02 13:54:23,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310055371] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:23,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124779834] [2023-04-02 13:54:23,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:54:23,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:23,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:23,566 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) [2023-04-02 13:54:23,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 13:54:23,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 13:54:23,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:23,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 13:54:23,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 13:54:23,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 13:54:23,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124779834] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:23,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [583370078] [2023-04-02 13:54:23,669 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 13:54:23,669 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:23,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:23,670 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:23,670 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:23,682 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:24,581 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 13:54:24,592 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 40 for LOIs [2023-04-02 13:54:24,603 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:24,607 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 30 for LOIs [2023-04-02 13:54:24,689 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:26,190 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2149#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#set~0.base_BEFORE_CALL_60| Int)) (and (<= 2 |v_main_~#set~0.base_BEFORE_CALL_60|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_60|) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_60|) 4) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_60|) 0)) (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_60| |#StackHeapBarrier|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:26,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:26,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:26,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 13:54:26,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319465651] [2023-04-02 13:54:26,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:26,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 13:54:26,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:26,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 13:54:26,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2023-04-02 13:54:26,192 INFO L87 Difference]: Start difference. First operand 64 states and 81 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) [2023-04-02 13:54:26,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:26,256 INFO L93 Difference]: Finished difference Result 165 states and 222 transitions. [2023-04-02 13:54:26,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 13:54:26,256 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 [2023-04-02 13:54:26,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:26,257 INFO L225 Difference]: With dead ends: 165 [2023-04-02 13:54:26,257 INFO L226 Difference]: Without dead ends: 114 [2023-04-02 13:54:26,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2023-04-02 13:54:26,259 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:26,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 90 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:26,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-04-02 13:54:26,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2023-04-02 13:54:26,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 80 states have internal predecessors, (94), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (27), 18 states have call predecessors, (27), 20 states have call successors, (27) [2023-04-02 13:54:26,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 142 transitions. [2023-04-02 13:54:26,281 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 142 transitions. Word has length 43 [2023-04-02 13:54:26,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:26,281 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 142 transitions. [2023-04-02 13:54:26,281 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) [2023-04-02 13:54:26,282 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 142 transitions. [2023-04-02 13:54:26,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-02 13:54:26,283 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:26,283 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] [2023-04-02 13:54:26,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:26,489 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 [2023-04-02 13:54:26,489 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:26,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:26,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1247403734, now seen corresponding path program 3 times [2023-04-02 13:54:26,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:26,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738775727] [2023-04-02 13:54:26,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:26,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-02 13:54:26,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:26,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738775727] [2023-04-02 13:54:26,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738775727] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:26,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195369517] [2023-04-02 13:54:26,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:54:26,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:26,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:26,609 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) [2023-04-02 13:54:26,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 13:54:26,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:54:26,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:26,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 13:54:26,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-04-02 13:54:26,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 34 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-04-02 13:54:26,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195369517] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:26,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [172385257] [2023-04-02 13:54:26,850 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 13:54:26,850 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:26,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:26,850 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:26,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:26,861 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:27,616 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 13:54:27,625 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 40 for LOIs [2023-04-02 13:54:27,630 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:27,632 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 30 for LOIs [2023-04-02 13:54:27,677 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:29,306 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2970#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#set~0.base_BEFORE_CALL_85| Int)) (and (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_85| |#StackHeapBarrier|)) (<= 2 |v_main_~#set~0.base_BEFORE_CALL_85|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_85|) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_85|) 4) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_85|) 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:29,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:29,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:29,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 11 [2023-04-02 13:54:29,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285689382] [2023-04-02 13:54:29,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:29,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 13:54:29,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:29,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 13:54:29,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 13:54:29,308 INFO L87 Difference]: Start difference. First operand 106 states and 142 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) [2023-04-02 13:54:29,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:29,510 INFO L93 Difference]: Finished difference Result 173 states and 234 transitions. [2023-04-02 13:54:29,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 13:54:29,511 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 [2023-04-02 13:54:29,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:29,512 INFO L225 Difference]: With dead ends: 173 [2023-04-02 13:54:29,512 INFO L226 Difference]: Without dead ends: 111 [2023-04-02 13:54:29,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=215, Invalid=1765, Unknown=0, NotChecked=0, Total=1980 [2023-04-02 13:54:29,514 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:29,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 136 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:54:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-02 13:54:29,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 86. [2023-04-02 13:54:29,538 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) [2023-04-02 13:54:29,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2023-04-02 13:54:29,539 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 64 [2023-04-02 13:54:29,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:29,539 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2023-04-02 13:54:29,540 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) [2023-04-02 13:54:29,540 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2023-04-02 13:54:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 13:54:29,541 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:29,541 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] [2023-04-02 13:54:29,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:29,745 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 [2023-04-02 13:54:29,745 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:29,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:29,746 INFO L85 PathProgramCache]: Analyzing trace with hash 401628486, now seen corresponding path program 1 times [2023-04-02 13:54:29,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:29,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299914569] [2023-04-02 13:54:29,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:29,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-02 13:54:29,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:29,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299914569] [2023-04-02 13:54:29,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299914569] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:29,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513316471] [2023-04-02 13:54:29,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:29,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:29,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:29,940 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) [2023-04-02 13:54:29,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 13:54:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:30,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 13:54:30,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-02 13:54:30,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-02 13:54:30,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513316471] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:30,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [300843967] [2023-04-02 13:54:30,135 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 13:54:30,135 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:30,135 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:30,135 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:30,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:30,147 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:30,694 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 13:54:30,703 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 40 for LOIs [2023-04-02 13:54:30,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:30,714 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 30 for LOIs [2023-04-02 13:54:30,749 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:32,226 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3861#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#set~0.base_BEFORE_CALL_98| Int)) (and (<= 2 |v_main_~#set~0.base_BEFORE_CALL_98|) (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_98| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_98|) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_98|) 4) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_98|) 0)))) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:32,226 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:32,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:32,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 13:54:32,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156660132] [2023-04-02 13:54:32,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:32,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 13:54:32,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:32,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 13:54:32,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2023-04-02 13:54:32,228 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) [2023-04-02 13:54:32,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:32,334 INFO L93 Difference]: Finished difference Result 208 states and 273 transitions. [2023-04-02 13:54:32,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 13:54:32,334 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 [2023-04-02 13:54:32,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:32,335 INFO L225 Difference]: With dead ends: 208 [2023-04-02 13:54:32,335 INFO L226 Difference]: Without dead ends: 132 [2023-04-02 13:54:32,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2023-04-02 13:54:32,337 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 65 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:32,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 102 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:54:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-04-02 13:54:32,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 92. [2023-04-02 13:54:32,355 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) [2023-04-02 13:54:32,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2023-04-02 13:54:32,356 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 76 [2023-04-02 13:54:32,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:32,356 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2023-04-02 13:54:32,356 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) [2023-04-02 13:54:32,356 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2023-04-02 13:54:32,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-02 13:54:32,357 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:32,357 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] [2023-04-02 13:54:32,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:32,561 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 [2023-04-02 13:54:32,561 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:32,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:32,561 INFO L85 PathProgramCache]: Analyzing trace with hash 219550182, now seen corresponding path program 2 times [2023-04-02 13:54:32,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:32,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480540526] [2023-04-02 13:54:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:32,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-02 13:54:32,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:32,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480540526] [2023-04-02 13:54:32,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480540526] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:32,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946011100] [2023-04-02 13:54:32,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:54:32,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:32,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:32,801 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) [2023-04-02 13:54:32,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 13:54:32,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 13:54:32,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:32,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 13:54:32,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:32,982 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-04-02 13:54:32,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-04-02 13:54:33,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946011100] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:33,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1741367722] [2023-04-02 13:54:33,064 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 13:54:33,064 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:33,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:33,065 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:33,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:33,076 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:33,640 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 13:54:33,650 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 40 for LOIs [2023-04-02 13:54:33,657 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:33,659 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 30 for LOIs [2023-04-02 13:54:33,702 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:35,198 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4866#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#set~0.base_BEFORE_CALL_115| Int)) (and (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_115| |#StackHeapBarrier|)) (<= 2 |v_main_~#set~0.base_BEFORE_CALL_115|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_115|) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_115|) 0) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_115|) 4)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:35,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:35,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:35,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 23 [2023-04-02 13:54:35,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765094351] [2023-04-02 13:54:35,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:35,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-02 13:54:35,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:35,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-02 13:54:35,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1894, Unknown=0, NotChecked=0, Total=2256 [2023-04-02 13:54:35,200 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) [2023-04-02 13:54:35,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:35,570 INFO L93 Difference]: Finished difference Result 309 states and 414 transitions. [2023-04-02 13:54:35,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 13:54:35,570 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 [2023-04-02 13:54:35,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:35,573 INFO L225 Difference]: With dead ends: 309 [2023-04-02 13:54:35,573 INFO L226 Difference]: Without dead ends: 233 [2023-04-02 13:54:35,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=595, Invalid=2711, Unknown=0, NotChecked=0, Total=3306 [2023-04-02 13:54:35,577 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 279 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:35,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 123 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 13:54:35,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-04-02 13:54:35,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 183. [2023-04-02 13:54:35,629 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) [2023-04-02 13:54:35,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 233 transitions. [2023-04-02 13:54:35,634 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 233 transitions. Word has length 82 [2023-04-02 13:54:35,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:35,634 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 233 transitions. [2023-04-02 13:54:35,634 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) [2023-04-02 13:54:35,634 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 233 transitions. [2023-04-02 13:54:35,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-02 13:54:35,636 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:35,636 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] [2023-04-02 13:54:35,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:35,857 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 [2023-04-02 13:54:35,857 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:35,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:35,857 INFO L85 PathProgramCache]: Analyzing trace with hash -557369507, now seen corresponding path program 3 times [2023-04-02 13:54:35,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:35,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069127610] [2023-04-02 13:54:35,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:35,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2023-04-02 13:54:36,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:36,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069127610] [2023-04-02 13:54:36,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069127610] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:36,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492148540] [2023-04-02 13:54:36,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:54:36,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:36,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:36,279 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) [2023-04-02 13:54:36,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 13:54:36,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:54:36,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:36,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 13:54:36,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2023-04-02 13:54:36,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2023-04-02 13:54:37,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492148540] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:37,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1924064571] [2023-04-02 13:54:37,243 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 13:54:37,243 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:37,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:37,244 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:37,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:37,257 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:37,805 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 13:54:37,814 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 40 for LOIs [2023-04-02 13:54:37,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:37,823 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 30 for LOIs [2023-04-02 13:54:37,864 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:39,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6697#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#set~0.base_BEFORE_CALL_132| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_132|) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_132|) 4) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_132|) 0)) (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_132| |#StackHeapBarrier|)) (<= 2 |v_main_~#set~0.base_BEFORE_CALL_132|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:39,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:39,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:39,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2023-04-02 13:54:39,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243506843] [2023-04-02 13:54:39,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:39,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-04-02 13:54:39,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:39,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-04-02 13:54:39,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=596, Invalid=3064, Unknown=0, NotChecked=0, Total=3660 [2023-04-02 13:54:39,609 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) [2023-04-02 13:54:40,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:40,408 INFO L93 Difference]: Finished difference Result 584 states and 793 transitions. [2023-04-02 13:54:40,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-04-02 13:54:40,408 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 [2023-04-02 13:54:40,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:40,411 INFO L225 Difference]: With dead ends: 584 [2023-04-02 13:54:40,411 INFO L226 Difference]: Without dead ends: 418 [2023-04-02 13:54:40,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2285 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1391, Invalid=5415, Unknown=0, NotChecked=0, Total=6806 [2023-04-02 13:54:40,414 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 475 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:40,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 160 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 13:54:40,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2023-04-02 13:54:40,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 364. [2023-04-02 13:54:40,477 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) [2023-04-02 13:54:40,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 474 transitions. [2023-04-02 13:54:40,480 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 474 transitions. Word has length 167 [2023-04-02 13:54:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:40,481 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 474 transitions. [2023-04-02 13:54:40,481 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) [2023-04-02 13:54:40,481 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 474 transitions. [2023-04-02 13:54:40,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2023-04-02 13:54:40,486 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:40,487 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] [2023-04-02 13:54:40,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:40,694 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 [2023-04-02 13:54:40,695 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:40,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:40,695 INFO L85 PathProgramCache]: Analyzing trace with hash -845540730, now seen corresponding path program 4 times [2023-04-02 13:54:40,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:40,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706360767] [2023-04-02 13:54:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:40,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3356 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3278 trivial. 0 not checked. [2023-04-02 13:54:41,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:41,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706360767] [2023-04-02 13:54:41,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706360767] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:41,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621243916] [2023-04-02 13:54:41,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:54:41,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:41,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:41,357 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) [2023-04-02 13:54:41,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 13:54:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:41,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-02 13:54:41,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3356 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3278 trivial. 0 not checked. [2023-04-02 13:54:41,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3356 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3278 trivial. 0 not checked. [2023-04-02 13:54:42,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621243916] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:42,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [472743797] [2023-04-02 13:54:42,065 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 13:54:42,065 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:42,066 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:42,066 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:42,066 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:42,076 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:42,624 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 13:54:42,632 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 40 for LOIs [2023-04-02 13:54:42,640 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:42,642 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 30 for LOIs [2023-04-02 13:54:42,712 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:44,242 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10252#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#set~0.base_BEFORE_CALL_149| Int)) (and (<= 2 |v_main_~#set~0.base_BEFORE_CALL_149|) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_149|) 4) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_149|) 0)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_149|) (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_149| |#StackHeapBarrier|)))) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:44,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:44,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:44,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2023-04-02 13:54:44,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650073688] [2023-04-02 13:54:44,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:44,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-02 13:54:44,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:44,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-02 13:54:44,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=798, Invalid=2064, Unknown=0, NotChecked=0, Total=2862 [2023-04-02 13:54:44,245 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) [2023-04-02 13:54:44,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:44,559 INFO L93 Difference]: Finished difference Result 828 states and 1113 transitions. [2023-04-02 13:54:44,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-02 13:54:44,560 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 [2023-04-02 13:54:44,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:44,564 INFO L225 Difference]: With dead ends: 828 [2023-04-02 13:54:44,564 INFO L226 Difference]: Without dead ends: 482 [2023-04-02 13:54:44,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1022 GetRequests, 970 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=798, Invalid=2064, Unknown=0, NotChecked=0, Total=2862 [2023-04-02 13:54:44,567 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 215 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:44,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 86 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 13:54:44,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-04-02 13:54:44,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 378. [2023-04-02 13:54:44,675 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) [2023-04-02 13:54:44,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 488 transitions. [2023-04-02 13:54:44,678 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 488 transitions. Word has length 336 [2023-04-02 13:54:44,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:44,678 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 488 transitions. [2023-04-02 13:54:44,678 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) [2023-04-02 13:54:44,679 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 488 transitions. [2023-04-02 13:54:44,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-04-02 13:54:44,686 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:44,686 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] [2023-04-02 13:54:44,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:44,894 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 [2023-04-02 13:54:44,894 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:44,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:44,895 INFO L85 PathProgramCache]: Analyzing trace with hash 128926374, now seen corresponding path program 5 times [2023-04-02 13:54:44,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:44,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138619631] [2023-04-02 13:54:44,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:44,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 3278 trivial. 0 not checked. [2023-04-02 13:54:46,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:46,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138619631] [2023-04-02 13:54:46,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138619631] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:46,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832884492] [2023-04-02 13:54:46,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:54:46,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:46,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:46,274 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) [2023-04-02 13:54:46,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 13:55:22,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-04-02 13:55:22,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:55:22,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 13:55:22,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:55:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3376 trivial. 0 not checked. [2023-04-02 13:55:22,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:55:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3376 trivial. 0 not checked. [2023-04-02 13:55:23,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832884492] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:55:23,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1413090287] [2023-04-02 13:55:23,783 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 13:55:23,783 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:55:23,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:55:23,784 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:55:23,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:55:23,795 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:55:24,359 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 13:55:24,367 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 40 for LOIs [2023-04-02 13:55:24,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:55:24,376 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 30 for LOIs [2023-04-02 13:55:24,420 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:55:26,347 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14281#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#set~0.base_BEFORE_CALL_166| Int)) (and (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_166|) 0) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_166|) 4)) (<= 2 |v_main_~#set~0.base_BEFORE_CALL_166|) (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_166| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_166|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:55:26,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:55:26,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:55:26,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25, 25] total 75 [2023-04-02 13:55:26,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56947669] [2023-04-02 13:55:26,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:55:26,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-04-02 13:55:26,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:55:26,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-04-02 13:55:26,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1928, Invalid=7972, Unknown=0, NotChecked=0, Total=9900 [2023-04-02 13:55:26,353 INFO L87 Difference]: Start difference. First operand 378 states and 488 transitions. Second operand has 75 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 75 states have internal predecessors, (106), 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) [2023-04-02 13:55:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:55:28,805 INFO L93 Difference]: Finished difference Result 1199 states and 1642 transitions. [2023-04-02 13:55:28,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-04-02 13:55:28,805 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 75 states have internal predecessors, (106), 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 350 [2023-04-02 13:55:28,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:55:28,810 INFO L225 Difference]: With dead ends: 1199 [2023-04-02 13:55:28,810 INFO L226 Difference]: Without dead ends: 853 [2023-04-02 13:55:28,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1124 GetRequests, 980 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6173 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5381, Invalid=15789, Unknown=0, NotChecked=0, Total=21170 [2023-04-02 13:55:28,817 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2216 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 1045 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2243 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1045 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 13:55:28,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2243 Valid, 259 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1045 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 13:55:28,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2023-04-02 13:55:28,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 739. [2023-04-02 13:55:28,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 548 states have (on average 1.0182481751824817) internal successors, (558), 549 states have internal predecessors, (558), 183 states have call successors, (183), 7 states have call predecessors, (183), 7 states have return successors, (228), 182 states have call predecessors, (228), 182 states have call successors, (228) [2023-04-02 13:55:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 969 transitions. [2023-04-02 13:55:28,947 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 969 transitions. Word has length 350 [2023-04-02 13:55:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:55:28,948 INFO L495 AbstractCegarLoop]: Abstraction has 739 states and 969 transitions. [2023-04-02 13:55:28,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 75 states have internal predecessors, (106), 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) [2023-04-02 13:55:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 969 transitions. [2023-04-02 13:55:28,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2023-04-02 13:55:28,963 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:55:28,964 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 45, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:55:28,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 13:55:29,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 13:55:29,177 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:55:29,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:55:29,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1723300573, now seen corresponding path program 6 times [2023-04-02 13:55:29,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:55:29,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893329601] [2023-04-02 13:55:29,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:55:29,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:55:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:55:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 14960 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 14582 trivial. 0 not checked. [2023-04-02 13:55:31,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:55:31,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893329601] [2023-04-02 13:55:31,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893329601] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:55:31,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209744735] [2023-04-02 13:55:31,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:55:31,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:55:31,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:55:31,285 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:55:31,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 13:55:45,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:55:45,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:55:45,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 3838 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-02 13:55:45,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:55:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 14960 backedges. 0 proven. 7291 refuted. 0 times theorem prover too weak. 7669 trivial. 0 not checked. [2023-04-02 13:55:47,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:55:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 14960 backedges. 0 proven. 7291 refuted. 0 times theorem prover too weak. 7669 trivial. 0 not checked. [2023-04-02 13:55:50,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209744735] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:55:50,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [339206013] [2023-04-02 13:55:50,500 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 13:55:50,500 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:55:50,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:55:50,501 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:55:50,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:55:50,518 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:55:51,021 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 13:55:51,030 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 40 for LOIs [2023-04-02 13:55:51,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:55:51,039 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 30 for LOIs [2023-04-02 13:55:51,077 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:55:53,338 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21548#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#set~0.base_BEFORE_CALL_183| Int)) (and (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_183| |#StackHeapBarrier|)) (<= 2 |v_main_~#set~0.base_BEFORE_CALL_183|) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_183|) 4) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_183|) 0)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_183|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:55:53,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:55:53,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:55:53,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 49, 49] total 124 [2023-04-02 13:55:53,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801507387] [2023-04-02 13:55:53,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:55:53,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2023-04-02 13:55:53,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:55:53,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2023-04-02 13:55:53,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5400, Invalid=16652, Unknown=0, NotChecked=0, Total=22052 [2023-04-02 13:55:53,346 INFO L87 Difference]: Start difference. First operand 739 states and 969 transitions. Second operand has 124 states, 124 states have (on average 4.185483870967742) internal successors, (519), 124 states have internal predecessors, (519), 94 states have call successors, (189), 2 states have call predecessors, (189), 1 states have return successors, (187), 94 states have call predecessors, (187), 94 states have call successors, (187) [2023-04-02 13:55:59,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:55:59,747 INFO L93 Difference]: Finished difference Result 2284 states and 3137 transitions. [2023-04-02 13:55:59,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-04-02 13:55:59,748 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 4.185483870967742) internal successors, (519), 124 states have internal predecessors, (519), 94 states have call successors, (189), 2 states have call predecessors, (189), 1 states have return successors, (187), 94 states have call predecessors, (187), 94 states have call successors, (187) Word has length 687 [2023-04-02 13:55:59,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:55:59,757 INFO L225 Difference]: With dead ends: 2284 [2023-04-02 13:55:59,757 INFO L226 Difference]: Without dead ends: 1578 [2023-04-02 13:55:59,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2278 GetRequests, 2037 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14499 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=17059, Invalid=41747, Unknown=0, NotChecked=0, Total=58806 [2023-04-02 13:55:59,764 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1896 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1924 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 2069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:55:59,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1924 Valid, 385 Invalid, 2069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1215 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 13:55:59,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2023-04-02 13:55:59,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1460. [2023-04-02 13:55:59,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1077 states have (on average 1.0092850510677809) internal successors, (1087), 1078 states have internal predecessors, (1087), 375 states have call successors, (375), 7 states have call predecessors, (375), 7 states have return successors, (468), 374 states have call predecessors, (468), 374 states have call successors, (468) [2023-04-02 13:55:59,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 1930 transitions. [2023-04-02 13:55:59,994 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 1930 transitions. Word has length 687 [2023-04-02 13:55:59,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:55:59,994 INFO L495 AbstractCegarLoop]: Abstraction has 1460 states and 1930 transitions. [2023-04-02 13:55:59,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 4.185483870967742) internal successors, (519), 124 states have internal predecessors, (519), 94 states have call successors, (189), 2 states have call predecessors, (189), 1 states have return successors, (187), 94 states have call predecessors, (187), 94 states have call successors, (187) [2023-04-02 13:55:59,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 1930 transitions. [2023-04-02 13:56:00,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1361 [2023-04-02 13:56:00,014 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:56:00,014 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 93, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:56:00,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 13:56:00,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 13:56:00,230 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:56:00,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:56:00,231 INFO L85 PathProgramCache]: Analyzing trace with hash 902221958, now seen corresponding path program 7 times [2023-04-02 13:56:00,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:56:00,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254535280] [2023-04-02 13:56:00,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:56:00,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:56:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:56:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 61788 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 61382 trivial. 0 not checked. [2023-04-02 13:56:03,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:56:03,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254535280] [2023-04-02 13:56:03,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254535280] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:56:03,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745797096] [2023-04-02 13:56:03,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:56:03,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:56:03,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:56:03,853 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:56:03,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 13:56:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:56:05,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 7495 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-02 13:56:05,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:56:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 61788 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 61382 trivial. 0 not checked. [2023-04-02 13:56:05,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:56:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 61788 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 61382 trivial. 0 not checked. [2023-04-02 13:56:06,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745797096] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:56:06,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [974944255] [2023-04-02 13:56:06,494 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 13:56:06,494 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:56:06,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:56:06,494 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:56:06,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:56:06,511 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:56:07,006 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 13:56:07,012 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 40 for LOIs [2023-04-02 13:56:07,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:56:07,019 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 30 for LOIs [2023-04-02 13:56:07,048 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:56:08,788 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35631#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#set~0.base_BEFORE_CALL_200| Int)) (and (<= 2 |v_main_~#set~0.base_BEFORE_CALL_200|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_200|) (= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_200|) 4) (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_200|) 0)) (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_200| |#StackHeapBarrier|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:56:08,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:56:08,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:56:08,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2023-04-02 13:56:08,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157183183] [2023-04-02 13:56:08,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:56:08,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-04-02 13:56:08,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:56:08,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-04-02 13:56:08,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2574, Invalid=4736, Unknown=0, NotChecked=0, Total=7310 [2023-04-02 13:56:08,792 INFO L87 Difference]: Start difference. First operand 1460 states and 1930 transitions. Second operand has 61 states, 61 states have (on average 1.459016393442623) internal successors, (89), 61 states have internal predecessors, (89), 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) [2023-04-02 13:56:09,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:56:09,866 INFO L93 Difference]: Finished difference Result 3148 states and 4233 transitions. [2023-04-02 13:56:09,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-04-02 13:56:09,866 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.459016393442623) internal successors, (89), 61 states have internal predecessors, (89), 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 1360 [2023-04-02 13:56:09,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:56:09,874 INFO L225 Difference]: With dead ends: 3148 [2023-04-02 13:56:09,874 INFO L226 Difference]: Without dead ends: 1722 [2023-04-02 13:56:09,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4110 GetRequests, 4026 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2738 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2574, Invalid=4736, Unknown=0, NotChecked=0, Total=7310 [2023-04-02 13:56:09,879 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 472 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 13:56:09,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 146 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 13:56:09,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2023-04-02 13:56:10,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1490. [2023-04-02 13:56:10,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1107 states have (on average 1.00903342366757) internal successors, (1117), 1108 states have internal predecessors, (1117), 375 states have call successors, (375), 7 states have call predecessors, (375), 7 states have return successors, (468), 374 states have call predecessors, (468), 374 states have call successors, (468) [2023-04-02 13:56:10,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 1960 transitions. [2023-04-02 13:56:10,124 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 1960 transitions. Word has length 1360 [2023-04-02 13:56:10,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:56:10,124 INFO L495 AbstractCegarLoop]: Abstraction has 1490 states and 1960 transitions. [2023-04-02 13:56:10,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.459016393442623) internal successors, (89), 61 states have internal predecessors, (89), 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) [2023-04-02 13:56:10,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 1960 transitions. [2023-04-02 13:56:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1391 [2023-04-02 13:56:10,143 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:56:10,144 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 93, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:56:10,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-02 13:56:10,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-02 13:56:10,365 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:56:10,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:56:10,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1084287066, now seen corresponding path program 8 times [2023-04-02 13:56:10,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:56:10,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794006494] [2023-04-02 13:56:10,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:56:10,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:56:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:56:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 63093 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 61382 trivial. 0 not checked. [2023-04-02 13:56:17,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:56:17,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794006494] [2023-04-02 13:56:17,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794006494] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:56:17,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709245481] [2023-04-02 13:56:17,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:56:17,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:56:17,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:56:17,024 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:56:17,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process