/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/standard_partition_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:11:51,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:11:51,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:11:51,711 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:11:51,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:11:51,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:11:51,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:11:51,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:11:51,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:11:51,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:11:51,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:11:51,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:11:51,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:11:51,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:11:51,730 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:11:51,731 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:11:51,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:11:51,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:11:51,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:11:51,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:11:51,739 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:11:51,740 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:11:51,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:11:51,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:11:51,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 14:11:51,749 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 14:11:51,749 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 14:11:51,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 14:11:51,750 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 14:11:51,752 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 14:11:51,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:11:51,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:11:51,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:11:51,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:11:51,755 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:11:51,755 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:11:51,755 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:11:51,755 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:11:51,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:11:51,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:11:51,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:11:51,758 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 14:11:51,782 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:11:51,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:11:51,783 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:11:51,783 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:11:51,784 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:11:51,784 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:11:51,784 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:11:51,784 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:11:51,784 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:11:51,784 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:11:51,785 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:11:51,785 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:11:51,786 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:11:51,786 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:11:51,786 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:11:51,786 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:11:51,786 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:11:51,786 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:11:51,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:11:51,787 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:11:51,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:11:51,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:11:51,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:11:51,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:11:51,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:11:51,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:11:51,787 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:11:51,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:11:51,788 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:11:51,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:11:51,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:11:51,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:11:51,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:11:51,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:11:51,789 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:11:51,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:11:51,789 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:11:51,789 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:11:51,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:11:51,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:11:51,789 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:11:51,789 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:11:51,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:11:52,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:11:52,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:11:52,020 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:11:52,021 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:11:52,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2023-04-02 14:11:53,106 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:11:53,265 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:11:53,266 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2023-04-02 14:11:53,271 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3e324045/4376967e98d54ef6b1120ce3195360be/FLAGc8f9769f3 [2023-04-02 14:11:53,286 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3e324045/4376967e98d54ef6b1120ce3195360be [2023-04-02 14:11:53,288 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:11:53,289 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:11:53,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:11:53,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:11:53,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:11:53,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:11:53" (1/1) ... [2023-04-02 14:11:53,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75affb5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:53, skipping insertion in model container [2023-04-02 14:11:53,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:11:53" (1/1) ... [2023-04-02 14:11:53,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:11:53,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:11:53,414 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/standard_partition_ground-2.i[820,833] [2023-04-02 14:11:53,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:11:53,432 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:11:53,441 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/standard_partition_ground-2.i[820,833] [2023-04-02 14:11:53,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:11:53,458 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:11:53,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:53 WrapperNode [2023-04-02 14:11:53,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:11:53,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:11:53,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:11:53,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:11:53,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:53" (1/1) ... [2023-04-02 14:11:53,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:53" (1/1) ... [2023-04-02 14:11:53,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:53" (1/1) ... [2023-04-02 14:11:53,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:53" (1/1) ... [2023-04-02 14:11:53,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:53" (1/1) ... [2023-04-02 14:11:53,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:53" (1/1) ... [2023-04-02 14:11:53,482 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:53" (1/1) ... [2023-04-02 14:11:53,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:53" (1/1) ... [2023-04-02 14:11:53,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:11:53,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:11:53,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:11:53,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:11:53,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:53" (1/1) ... [2023-04-02 14:11:53,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:11:53,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:11:53,515 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 14:11:53,520 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 14:11:53,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:11:53,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:11:53,543 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:11:53,543 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:11:53,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:11:53,543 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:11:53,543 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:11:53,544 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 14:11:53,544 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 14:11:53,544 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:11:53,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:11:53,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:11:53,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 14:11:53,544 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:11:53,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:11:53,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:11:53,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:11:53,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:11:53,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:11:53,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:11:53,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:11:53,607 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:11:53,609 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:11:53,807 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:11:53,908 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:11:53,909 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-02 14:11:53,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:11:53 BoogieIcfgContainer [2023-04-02 14:11:53,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:11:53,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:11:53,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:11:53,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:11:53,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:11:53" (1/3) ... [2023-04-02 14:11:53,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57655b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:11:53, skipping insertion in model container [2023-04-02 14:11:53,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:53" (2/3) ... [2023-04-02 14:11:53,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57655b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:11:53, skipping insertion in model container [2023-04-02 14:11:53,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:11:53" (3/3) ... [2023-04-02 14:11:53,927 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2023-04-02 14:11:53,941 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:11:53,942 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:11:53,992 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:11:54,000 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;@6494ef32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:11:54,000 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:11:54,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:11:54,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 14:11:54,010 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:11:54,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:11:54,011 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:11:54,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:11:54,017 INFO L85 PathProgramCache]: Analyzing trace with hash 149831594, now seen corresponding path program 1 times [2023-04-02 14:11:54,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:11:54,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395436914] [2023-04-02 14:11:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:11:54,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:11:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:54,272 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 14:11:54,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:11:54,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395436914] [2023-04-02 14:11:54,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395436914] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:11:54,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:11:54,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:11:54,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940733390] [2023-04-02 14:11:54,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:11:54,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:11:54,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:11:54,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:11:54,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:11:54,319 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:11:54,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:11:54,379 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-04-02 14:11:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:11:54,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-02 14:11:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:11:54,389 INFO L225 Difference]: With dead ends: 35 [2023-04-02 14:11:54,389 INFO L226 Difference]: Without dead ends: 18 [2023-04-02 14:11:54,391 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 14:11:54,396 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:11:54,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:11:54,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-02 14:11:54,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-04-02 14:11:54,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:11:54,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-04-02 14:11:54,430 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2023-04-02 14:11:54,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:11:54,430 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-04-02 14:11:54,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:11:54,431 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-04-02 14:11:54,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 14:11:54,432 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:11:54,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:11:54,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 14:11:54,433 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:11:54,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:11:54,434 INFO L85 PathProgramCache]: Analyzing trace with hash 966017234, now seen corresponding path program 1 times [2023-04-02 14:11:54,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:11:54,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337041078] [2023-04-02 14:11:54,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:11:54,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:11:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:11:54,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:11:54,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337041078] [2023-04-02 14:11:54,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337041078] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:11:54,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:11:54,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:11:54,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674505635] [2023-04-02 14:11:54,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:11:54,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:11:54,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:11:54,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:11:54,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:11:54,541 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 14:11:54,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:11:54,567 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-04-02 14:11:54,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:11:54,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2023-04-02 14:11:54,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:11:54,568 INFO L225 Difference]: With dead ends: 30 [2023-04-02 14:11:54,568 INFO L226 Difference]: Without dead ends: 20 [2023-04-02 14:11:54,569 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 14:11:54,570 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:11:54,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:11:54,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-02 14:11:54,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-02 14:11:54,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:11:54,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-04-02 14:11:54,577 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2023-04-02 14:11:54,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:11:54,578 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-04-02 14:11:54,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 14:11:54,578 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-04-02 14:11:54,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 14:11:54,579 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:11:54,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:11:54,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 14:11:54,579 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:11:54,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:11:54,580 INFO L85 PathProgramCache]: Analyzing trace with hash -349934862, now seen corresponding path program 1 times [2023-04-02 14:11:54,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:11:54,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929641420] [2023-04-02 14:11:54,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:11:54,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:11:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:54,690 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 14:11:54,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:11:54,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929641420] [2023-04-02 14:11:54,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929641420] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:11:54,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305371618] [2023-04-02 14:11:54,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:11:54,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:11:54,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:11:54,699 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 14:11:54,713 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 14:11:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:54,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:11:54,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:11:54,813 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 14:11:54,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:11:54,869 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 14:11:54,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305371618] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:11:54,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1814911380] [2023-04-02 14:11:54,884 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 14:11:54,885 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:11:54,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:11:54,906 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:11:54,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:11:55,020 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:11:55,510 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-02 14:11:55,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:11:55,536 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:11:55,814 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '289#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#bb~0.base_BEFORE_CALL_1| Int) (|v_main_~#bb~0.offset_BEFORE_CALL_1| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_1|) |v_main_~#bb~0.offset_BEFORE_CALL_1|) 0)))' at error location [2023-04-02 14:11:55,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:11:55,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:11:55,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:11:55,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007675732] [2023-04-02 14:11:55,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:11:55,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:11:55,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:11:55,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:11:55,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:11:55,817 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 14:11:55,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:11:55,861 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2023-04-02 14:11:55,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:11:55,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 16 [2023-04-02 14:11:55,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:11:55,863 INFO L225 Difference]: With dead ends: 36 [2023-04-02 14:11:55,864 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 14:11:55,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:11:55,869 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:11:55,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:11:55,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 14:11:55,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-02 14:11:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:11:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-04-02 14:11:55,879 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2023-04-02 14:11:55,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:11:55,879 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-04-02 14:11:55,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 14:11:55,880 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-04-02 14:11:55,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 14:11:55,881 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:11:55,881 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:11:55,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 14:11:56,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:11:56,088 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:11:56,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:11:56,089 INFO L85 PathProgramCache]: Analyzing trace with hash -278225462, now seen corresponding path program 2 times [2023-04-02 14:11:56,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:11:56,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376113967] [2023-04-02 14:11:56,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:11:56,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:11:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 14:11:56,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:11:56,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376113967] [2023-04-02 14:11:56,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376113967] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:11:56,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625748782] [2023-04-02 14:11:56,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:11:56,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:11:56,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:11:56,211 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 14:11:56,214 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 14:11:56,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 14:11:56,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:11:56,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:11:56,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:11:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 14:11:56,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:11:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 14:11:56,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625748782] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:11:56,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [452185294] [2023-04-02 14:11:56,343 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 14:11:56,343 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:11:56,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:11:56,344 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:11:56,344 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:11:56,372 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:11:56,609 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-02 14:11:56,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:11:56,621 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:11:56,850 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '516#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#bb~0.base_BEFORE_CALL_2| Int) (|v_main_~#bb~0.offset_BEFORE_CALL_2| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_2|) |v_main_~#bb~0.offset_BEFORE_CALL_2|) 0)))' at error location [2023-04-02 14:11:56,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:11:56,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:11:56,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:11:56,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101210973] [2023-04-02 14:11:56,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:11:56,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:11:56,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:11:56,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:11:56,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:11:56,852 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 14:11:56,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:11:56,892 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-04-02 14:11:56,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:11:56,894 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 19 [2023-04-02 14:11:56,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:11:56,895 INFO L225 Difference]: With dead ends: 40 [2023-04-02 14:11:56,895 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 14:11:56,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:11:56,896 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:11:56,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:11:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 14:11:56,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-02 14:11:56,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:11:56,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-04-02 14:11:56,905 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 19 [2023-04-02 14:11:56,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:11:56,905 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-04-02 14:11:56,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 14:11:56,906 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-04-02 14:11:56,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 14:11:56,906 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:11:56,906 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:11:56,918 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 14:11:57,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-02 14:11:57,113 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:11:57,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:11:57,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1079441194, now seen corresponding path program 3 times [2023-04-02 14:11:57,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:11:57,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435121049] [2023-04-02 14:11:57,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:11:57,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:11:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 14:11:57,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:11:57,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435121049] [2023-04-02 14:11:57,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435121049] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:11:57,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659013241] [2023-04-02 14:11:57,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:11:57,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:11:57,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:11:57,273 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 14:11:57,298 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 14:11:57,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:11:57,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:11:57,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:11:57,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:11:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 14:11:57,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:11:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 14:11:57,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659013241] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:11:57,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [622714423] [2023-04-02 14:11:57,454 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 14:11:57,454 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:11:57,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:11:57,455 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:11:57,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:11:57,475 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:11:57,679 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-02 14:11:57,685 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:11:57,688 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:11:57,913 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '805#(and (exists ((|v_main_~#bb~0.offset_BEFORE_CALL_3| Int) (|v_main_~#bb~0.base_BEFORE_CALL_3| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_3|) |v_main_~#bb~0.offset_BEFORE_CALL_3|) 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 14:11:57,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:11:57,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:11:57,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 14:11:57,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439343425] [2023-04-02 14:11:57,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:11:57,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 14:11:57,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:11:57,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 14:11:57,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-04-02 14:11:57,915 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 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 14:11:57,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:11:57,950 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2023-04-02 14:11:57,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 14:11:57,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 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 25 [2023-04-02 14:11:57,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:11:57,951 INFO L225 Difference]: With dead ends: 54 [2023-04-02 14:11:57,951 INFO L226 Difference]: Without dead ends: 35 [2023-04-02 14:11:57,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-04-02 14:11:57,953 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:11:57,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:11:57,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-02 14:11:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-02 14:11:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:11:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2023-04-02 14:11:57,958 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 25 [2023-04-02 14:11:57,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:11:57,958 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2023-04-02 14:11:57,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 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 14:11:57,959 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2023-04-02 14:11:57,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 14:11:57,959 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:11:57,959 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:11:57,968 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 14:11:58,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:11:58,166 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:11:58,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:11:58,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1040636374, now seen corresponding path program 4 times [2023-04-02 14:11:58,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:11:58,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912656111] [2023-04-02 14:11:58,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:11:58,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:11:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 14:11:58,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:11:58,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912656111] [2023-04-02 14:11:58,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912656111] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:11:58,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827154176] [2023-04-02 14:11:58,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:11:58,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:11:58,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:11:58,428 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 14:11:58,453 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 14:11:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:58,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:11:58,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:11:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 14:11:58,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:11:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 14:11:58,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827154176] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:11:58,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [729171397] [2023-04-02 14:11:58,755 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 14:11:58,755 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:11:58,755 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:11:58,755 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:11:58,755 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:11:58,774 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:11:58,959 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-02 14:11:58,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:11:58,967 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:11:59,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1182#(and (exists ((|v_main_~#bb~0.offset_BEFORE_CALL_4| Int) (|v_main_~#bb~0.base_BEFORE_CALL_4| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_4|) |v_main_~#bb~0.offset_BEFORE_CALL_4|) 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 14:11:59,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:11:59,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:11:59,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 14:11:59,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635361276] [2023-04-02 14:11:59,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:11:59,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 14:11:59,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:11:59,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 14:11:59,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 14:11:59,214 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 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 14:11:59,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:11:59,285 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2023-04-02 14:11:59,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 14:11:59,287 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 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 31 [2023-04-02 14:11:59,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:11:59,289 INFO L225 Difference]: With dead ends: 66 [2023-04-02 14:11:59,289 INFO L226 Difference]: Without dead ends: 47 [2023-04-02 14:11:59,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 14:11:59,293 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:11:59,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:11:59,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-02 14:11:59,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-02 14:11:59,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:11:59,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-04-02 14:11:59,305 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 31 [2023-04-02 14:11:59,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:11:59,305 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-04-02 14:11:59,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 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 14:11:59,305 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-04-02 14:11:59,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-02 14:11:59,307 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:11:59,308 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:11:59,316 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 14:11:59,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:11:59,514 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:11:59,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:11:59,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1942996010, now seen corresponding path program 5 times [2023-04-02 14:11:59,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:11:59,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995612369] [2023-04-02 14:11:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:11:59,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:11:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:12:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 14:12:00,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:12:00,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995612369] [2023-04-02 14:12:00,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995612369] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:12:00,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594098841] [2023-04-02 14:12:00,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:12:00,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:12:00,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:12:00,085 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 14:12:00,098 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 14:12:00,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:12:00,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:12:00,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:12:00,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:12:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2023-04-02 14:12:00,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:12:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2023-04-02 14:12:00,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594098841] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:12:00,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [801643497] [2023-04-02 14:12:00,385 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 14:12:00,385 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:12:00,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:12:00,385 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:12:00,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:12:00,399 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:12:00,579 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-02 14:12:00,584 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:12:00,591 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:12:00,915 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1689#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#bb~0.offset_BEFORE_CALL_5| Int) (|v_main_~#bb~0.base_BEFORE_CALL_5| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_5|) |v_main_~#bb~0.offset_BEFORE_CALL_5|) 0)))' at error location [2023-04-02 14:12:00,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:12:00,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:12:00,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-04-02 14:12:00,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434688345] [2023-04-02 14:12:00,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:12:00,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-02 14:12:00,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:12:00,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-02 14:12:00,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1663, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 14:12:00,918 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 35 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 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 14:12:01,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:12:01,356 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2023-04-02 14:12:01,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-02 14:12:01,357 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 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 43 [2023-04-02 14:12:01,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:12:01,358 INFO L225 Difference]: With dead ends: 79 [2023-04-02 14:12:01,358 INFO L226 Difference]: Without dead ends: 60 [2023-04-02 14:12:01,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1212, Invalid=3480, Unknown=0, NotChecked=0, Total=4692 [2023-04-02 14:12:01,363 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:12:01,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 78 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:12:01,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-02 14:12:01,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-04-02 14:12:01,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:12:01,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2023-04-02 14:12:01,378 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 43 [2023-04-02 14:12:01,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:12:01,380 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2023-04-02 14:12:01,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 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 14:12:01,380 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2023-04-02 14:12:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-02 14:12:01,381 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:12:01,381 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:12:01,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 14:12:01,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:12:01,585 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:12:01,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:12:01,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1637975954, now seen corresponding path program 6 times [2023-04-02 14:12:01,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:12:01,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001396142] [2023-04-02 14:12:01,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:12:01,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:12:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:12:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-02 14:12:02,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:12:02,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001396142] [2023-04-02 14:12:02,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001396142] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:12:02,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38155106] [2023-04-02 14:12:02,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:12:02,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:12:02,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:12:02,340 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 14:12:02,342 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 14:12:02,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:12:02,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:12:02,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 14:12:02,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:12:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-02 14:12:02,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:12:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-02 14:12:03,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38155106] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:12:03,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2087008847] [2023-04-02 14:12:03,175 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 14:12:03,175 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:12:03,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:12:03,175 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:12:03,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:12:03,202 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:12:03,385 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-02 14:12:03,392 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:12:03,395 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:12:03,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2388#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#bb~0.offset_BEFORE_CALL_6| Int) (|v_main_~#bb~0.base_BEFORE_CALL_6| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_6|) |v_main_~#bb~0.offset_BEFORE_CALL_6|) 0)))' at error location [2023-04-02 14:12:03,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:12:03,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:12:03,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-04-02 14:12:03,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165239378] [2023-04-02 14:12:03,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:12:03,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-02 14:12:03,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:12:03,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-02 14:12:03,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1307, Invalid=2475, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 14:12:03,706 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 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 14:12:03,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:12:03,793 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2023-04-02 14:12:03,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-02 14:12:03,794 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 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 56 [2023-04-02 14:12:03,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:12:03,795 INFO L225 Difference]: With dead ends: 116 [2023-04-02 14:12:03,795 INFO L226 Difference]: Without dead ends: 85 [2023-04-02 14:12:03,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1307, Invalid=2475, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 14:12:03,802 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:12:03,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:12:03,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-04-02 14:12:03,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-04-02 14:12:03,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:12:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2023-04-02 14:12:03,819 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 56 [2023-04-02 14:12:03,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:12:03,819 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2023-04-02 14:12:03,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 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 14:12:03,819 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2023-04-02 14:12:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-02 14:12:03,820 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:12:03,820 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:12:03,832 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 14:12:04,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:12:04,028 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:12:04,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:12:04,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1691182742, now seen corresponding path program 7 times [2023-04-02 14:12:04,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:12:04,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131157550] [2023-04-02 14:12:04,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:12:04,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:12:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:12:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-02 14:12:06,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:12:06,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131157550] [2023-04-02 14:12:06,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131157550] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:12:06,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921763090] [2023-04-02 14:12:06,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:12:06,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:12:06,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:12:06,193 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 14:12:06,212 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 14:12:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:12:06,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-02 14:12:06,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:12:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-02 14:12:06,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:12:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-02 14:12:08,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921763090] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:12:08,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [280651156] [2023-04-02 14:12:08,917 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 14:12:08,917 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:12:08,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:12:08,917 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:12:08,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:12:08,937 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:12:09,112 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-02 14:12:09,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:12:09,118 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:12:09,501 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3365#(and (exists ((|v_main_~#bb~0.offset_BEFORE_CALL_7| Int) (|v_main_~#bb~0.base_BEFORE_CALL_7| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_7|) |v_main_~#bb~0.offset_BEFORE_CALL_7|) 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 14:12:09,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:12:09,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:12:09,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-04-02 14:12:09,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887407827] [2023-04-02 14:12:09,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:12:09,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-04-02 14:12:09,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:12:09,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-04-02 14:12:09,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5082, Invalid=7350, Unknown=0, NotChecked=0, Total=12432 [2023-04-02 14:12:09,510 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 101 states have internal predecessors, (111), 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 14:12:09,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:12:09,649 INFO L93 Difference]: Finished difference Result 166 states and 221 transitions. [2023-04-02 14:12:09,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-04-02 14:12:09,650 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 101 states have internal predecessors, (111), 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 81 [2023-04-02 14:12:09,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:12:09,651 INFO L225 Difference]: With dead ends: 166 [2023-04-02 14:12:09,651 INFO L226 Difference]: Without dead ends: 135 [2023-04-02 14:12:09,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5082, Invalid=7350, Unknown=0, NotChecked=0, Total=12432 [2023-04-02 14:12:09,656 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:12:09,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:12:09,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-04-02 14:12:09,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-04-02 14:12:09,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 129 states have (on average 1.0310077519379846) internal successors, (133), 129 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:12:09,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2023-04-02 14:12:09,673 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 81 [2023-04-02 14:12:09,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:12:09,674 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2023-04-02 14:12:09,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 101 states have internal predecessors, (111), 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 14:12:09,675 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2023-04-02 14:12:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-02 14:12:09,681 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:12:09,681 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:12:09,691 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 14:12:09,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:12:09,888 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:12:09,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:12:09,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1571768726, now seen corresponding path program 8 times [2023-04-02 14:12:09,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:12:09,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972016943] [2023-04-02 14:12:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:12:09,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:12:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:12:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-02 14:12:15,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:12:15,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972016943] [2023-04-02 14:12:15,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972016943] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:12:15,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309035206] [2023-04-02 14:12:15,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:12:15,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:12:15,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:12:15,539 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 14:12:15,541 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 14:12:16,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 14:12:16,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:12:16,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:12:16,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:12:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4906 trivial. 0 not checked. [2023-04-02 14:12:16,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:12:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4906 trivial. 0 not checked. [2023-04-02 14:12:17,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309035206] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:12:17,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [727887521] [2023-04-02 14:12:17,010 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 14:12:17,010 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:12:17,010 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:12:17,010 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:12:17,010 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:12:17,023 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:12:17,168 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-02 14:12:17,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:12:17,181 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:12:17,854 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4864#(and (exists ((|v_main_~#bb~0.offset_BEFORE_CALL_8| Int) (|v_main_~#bb~0.base_BEFORE_CALL_8| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_8|) |v_main_~#bb~0.offset_BEFORE_CALL_8|) 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 14:12:17,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:12:17,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:12:17,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 13, 13] total 123 [2023-04-02 14:12:17,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857278014] [2023-04-02 14:12:17,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:12:17,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-04-02 14:12:17,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:12:17,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-04-02 14:12:17,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5379, Invalid=12443, Unknown=0, NotChecked=0, Total=17822 [2023-04-02 14:12:17,862 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 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 14:12:22,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:12:22,072 INFO L93 Difference]: Finished difference Result 191 states and 221 transitions. [2023-04-02 14:12:22,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-04-02 14:12:22,072 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 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 131 [2023-04-02 14:12:22,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:12:22,074 INFO L225 Difference]: With dead ends: 191 [2023-04-02 14:12:22,074 INFO L226 Difference]: Without dead ends: 160 [2023-04-02 14:12:22,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8957 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=17556, Invalid=36500, Unknown=0, NotChecked=0, Total=54056 [2023-04-02 14:12:22,082 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 505 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:12:22,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 111 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:12:22,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-04-02 14:12:22,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2023-04-02 14:12:22,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.025974025974026) internal successors, (158), 154 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:12:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2023-04-02 14:12:22,110 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 131 [2023-04-02 14:12:22,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:12:22,110 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2023-04-02 14:12:22,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 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 14:12:22,111 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2023-04-02 14:12:22,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-04-02 14:12:22,116 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:12:22,117 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:12:22,127 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 14:12:22,324 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,SelfDestructingSolverStorable9 [2023-04-02 14:12:22,325 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:12:22,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:12:22,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1594448402, now seen corresponding path program 9 times [2023-04-02 14:12:22,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:12:22,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679742852] [2023-04-02 14:12:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:12:22,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:12:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:12:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5456 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-04-02 14:12:28,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:12:28,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679742852] [2023-04-02 14:12:28,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679742852] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:12:28,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291136333] [2023-04-02 14:12:28,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:12:28,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:12:28,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:12:28,093 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 14:12:28,098 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 14:12:28,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:12:28,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:12:28,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-02 14:12:28,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:12:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5456 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-04-02 14:12:28,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:12:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5456 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-04-02 14:12:38,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291136333] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:12:38,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [43291972] [2023-04-02 14:12:38,005 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 14:12:38,005 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:12:38,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:12:38,005 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:12:38,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:12:38,020 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:12:38,195 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-02 14:12:38,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:12:38,203 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:12:38,789 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6891#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#bb~0.base_BEFORE_CALL_9| Int) (|v_main_~#bb~0.offset_BEFORE_CALL_9| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_9|) |v_main_~#bb~0.offset_BEFORE_CALL_9|) 0)))' at error location [2023-04-02 14:12:38,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:12:38,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:12:38,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-04-02 14:12:38,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504196658] [2023-04-02 14:12:38,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:12:38,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-04-02 14:12:38,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:12:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-04-02 14:12:38,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20535, Invalid=25047, Unknown=0, NotChecked=0, Total=45582 [2023-04-02 14:12:38,799 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 203 states have internal predecessors, (213), 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 14:12:39,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:12:39,106 INFO L93 Difference]: Finished difference Result 316 states and 422 transitions. [2023-04-02 14:12:39,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-04-02 14:12:39,107 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 203 states have internal predecessors, (213), 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 156 [2023-04-02 14:12:39,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:12:39,108 INFO L225 Difference]: With dead ends: 316 [2023-04-02 14:12:39,108 INFO L226 Difference]: Without dead ends: 261 [2023-04-02 14:12:39,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3721 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=20535, Invalid=25047, Unknown=0, NotChecked=0, Total=45582 [2023-04-02 14:12:39,112 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:12:39,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:12:39,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-04-02 14:12:39,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2023-04-02 14:12:39,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 255 states have (on average 1.0156862745098039) internal successors, (259), 255 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:12:39,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 264 transitions. [2023-04-02 14:12:39,129 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 264 transitions. Word has length 156 [2023-04-02 14:12:39,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:12:39,130 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 264 transitions. [2023-04-02 14:12:39,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 203 states have internal predecessors, (213), 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 14:12:39,130 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 264 transitions. [2023-04-02 14:12:39,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-04-02 14:12:39,133 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:12:39,133 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:12:39,143 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 14:12:39,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:12:39,340 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:12:39,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:12:39,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1552261654, now seen corresponding path program 10 times [2023-04-02 14:12:39,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:12:39,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799892272] [2023-04-02 14:12:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:12:39,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:12:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:12:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 20606 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-04-02 14:12:58,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:12:58,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799892272] [2023-04-02 14:12:58,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799892272] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:12:58,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272204475] [2023-04-02 14:12:58,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:12:58,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:12:58,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:12:58,929 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 14:12:58,933 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 14:12:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:12:59,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 2175 conjuncts, 202 conjunts are in the unsatisfiable core [2023-04-02 14:12:59,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:12:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20606 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-04-02 14:12:59,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:13:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20606 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-04-02 14:13:36,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272204475] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:13:36,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1953668071] [2023-04-02 14:13:36,907 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 14:13:36,907 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:13:36,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:13:36,908 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:13:36,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:13:36,928 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:13:37,061 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-02 14:13:37,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:13:37,067 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:13:38,133 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9980#(and (exists ((|v_main_~#bb~0.base_BEFORE_CALL_10| Int) (|v_main_~#bb~0.offset_BEFORE_CALL_10| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_10|) |v_main_~#bb~0.offset_BEFORE_CALL_10|) 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 14:13:38,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:13:38,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:13:38,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2023-04-02 14:13:38,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736290175] [2023-04-02 14:13:38,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:13:38,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2023-04-02 14:13:38,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:13:38,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2023-04-02 14:13:38,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81842, Invalid=90798, Unknown=0, NotChecked=0, Total=172640 [2023-04-02 14:13:38,153 INFO L87 Difference]: Start difference. First operand 261 states and 264 transitions. Second operand has 405 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 405 states have internal predecessors, (415), 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 14:13:39,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:13:39,742 INFO L93 Difference]: Finished difference Result 518 states and 725 transitions. [2023-04-02 14:13:39,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2023-04-02 14:13:39,743 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 405 states have internal predecessors, (415), 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 257 [2023-04-02 14:13:39,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:13:39,745 INFO L225 Difference]: With dead ends: 518 [2023-04-02 14:13:39,745 INFO L226 Difference]: Without dead ends: 463 [2023-04-02 14:13:39,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 973 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 414 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7458 ImplicationChecksByTransitivity, 50.2s TimeCoverageRelationStatistics Valid=81842, Invalid=90798, Unknown=0, NotChecked=0, Total=172640 [2023-04-02 14:13:39,752 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 14:13:39,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 14:13:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-04-02 14:13:39,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 463. [2023-04-02 14:13:39,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 457 states have (on average 1.0087527352297594) internal successors, (461), 457 states have internal predecessors, (461), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:13:39,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 466 transitions. [2023-04-02 14:13:39,773 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 466 transitions. Word has length 257 [2023-04-02 14:13:39,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:13:39,774 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 466 transitions. [2023-04-02 14:13:39,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 405 states have internal predecessors, (415), 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 14:13:39,774 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 466 transitions. [2023-04-02 14:13:39,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-04-02 14:13:39,779 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:13:39,779 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:13:39,789 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 14:13:39,989 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,SelfDestructingSolverStorable11 [2023-04-02 14:13:39,989 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:13:39,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:13:39,990 INFO L85 PathProgramCache]: Analyzing trace with hash 989198058, now seen corresponding path program 11 times [2023-04-02 14:13:39,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:13:39,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266272846] [2023-04-02 14:13:39,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:13:39,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:13:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:15:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 81509 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-04-02 14:15:00,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:15:00,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266272846] [2023-04-02 14:15:00,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266272846] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:15:00,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780668202] [2023-04-02 14:15:00,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:15:00,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:15:00,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:15:00,105 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 14:15:00,109 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 14:15:14,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-04-02 14:15:14,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:15:14,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-02 14:15:14,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:15:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 81509 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81256 trivial. 0 not checked. [2023-04-02 14:15:18,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:15:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 81509 backedges. 0 proven. 296 refuted. 0 times theorem prover too weak. 81213 trivial. 0 not checked. [2023-04-02 14:15:22,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780668202] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:15:22,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [880940256] [2023-04-02 14:15:22,216 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 14:15:22,216 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:15:22,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:15:22,216 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:15:22,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:15:22,230 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:15:22,355 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-02 14:15:22,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:15:22,362 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:15:24,373 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15136#(and (exists ((|v_main_~#bb~0.base_BEFORE_CALL_11| Int) (|v_main_~#bb~0.offset_BEFORE_CALL_11| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_11|) |v_main_~#bb~0.offset_BEFORE_CALL_11|) 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 14:15:24,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:15:24,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:15:24,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 25, 26] total 452 [2023-04-02 14:15:24,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545436328] [2023-04-02 14:15:24,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:15:24,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 452 states [2023-04-02 14:15:24,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:15:24,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 452 interpolants. [2023-04-02 14:15:24,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83065, Invalid=130841, Unknown=0, NotChecked=0, Total=213906 [2023-04-02 14:15:24,398 INFO L87 Difference]: Start difference. First operand 463 states and 466 transitions. Second operand has 452 states, 452 states have (on average 1.0353982300884956) internal successors, (468), 452 states have internal predecessors, (468), 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)