/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/reducercommutativity/avg60-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:26:13,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:26:13,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:26:13,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:26:13,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:26:13,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:26:13,560 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:26:13,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:26:13,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:26:13,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:26:13,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:26:13,570 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:26:13,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:26:13,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:26:13,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:26:13,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:26:13,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:26:13,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:26:13,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:26:13,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:26:13,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:26:13,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:26:13,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:26:13,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:26:13,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 14:26:13,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 14:26:13,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 14:26:13,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 14:26:13,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 14:26:13,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 14:26:13,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:26:13,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:26:13,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:26:13,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:26:13,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:26:13,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:26:13,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:26:13,592 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:26:13,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:26:13,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:26:13,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:26:13,596 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 14:26:13,618 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:26:13,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:26:13,619 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:26:13,619 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:26:13,620 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:26:13,620 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:26:13,620 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:26:13,620 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:26:13,620 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:26:13,620 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:26:13,621 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:26:13,621 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:26:13,621 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:26:13,621 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:26:13,621 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:26:13,621 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:26:13,621 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:26:13,621 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:26:13,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:26:13,622 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:26:13,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:26:13,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:26:13,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:26:13,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:26:13,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:26:13,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:26:13,623 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:26:13,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:26:13,623 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:26:13,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:26:13,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:26:13,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:26:13,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:26:13,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:26:13,624 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:26:13,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:26:13,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:26:13,624 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:26:13,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:26:13,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:26:13,624 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:26:13,624 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:26:13,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:26:13,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:26:13,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:26:13,793 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:26:13,794 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:26:13,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/avg60-1.i [2023-04-02 14:26:14,624 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:26:14,834 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:26:14,834 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg60-1.i [2023-04-02 14:26:14,842 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4a527965/11c6503e368b486a8b766cb0cd64c934/FLAG8010c4f49 [2023-04-02 14:26:14,859 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4a527965/11c6503e368b486a8b766cb0cd64c934 [2023-04-02 14:26:14,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:26:14,862 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:26:14,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:26:14,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:26:14,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:26:14,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:26:14" (1/1) ... [2023-04-02 14:26:14,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c8e6ebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:14, skipping insertion in model container [2023-04-02 14:26:14,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:26:14" (1/1) ... [2023-04-02 14:26:14,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:26:14,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:26:14,985 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/reducercommutativity/avg60-1.i[1282,1295] [2023-04-02 14:26:14,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:26:14,994 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:26:15,006 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/reducercommutativity/avg60-1.i[1282,1295] [2023-04-02 14:26:15,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:26:15,016 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:26:15,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:15 WrapperNode [2023-04-02 14:26:15,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:26:15,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:26:15,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:26:15,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:26:15,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:15" (1/1) ... [2023-04-02 14:26:15,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:15" (1/1) ... [2023-04-02 14:26:15,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:15" (1/1) ... [2023-04-02 14:26:15,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:15" (1/1) ... [2023-04-02 14:26:15,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:15" (1/1) ... [2023-04-02 14:26:15,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:15" (1/1) ... [2023-04-02 14:26:15,037 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:15" (1/1) ... [2023-04-02 14:26:15,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:15" (1/1) ... [2023-04-02 14:26:15,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:26:15,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:26:15,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:26:15,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:26:15,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:15" (1/1) ... [2023-04-02 14:26:15,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:26:15,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:26:15,060 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 14:26:15,065 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 14:26:15,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:26:15,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:26:15,085 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:26:15,085 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2023-04-02 14:26:15,085 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:26:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:26:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:26:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 14:26:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 14:26:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:26:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:26:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 14:26:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2023-04-02 14:26:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:26:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:26:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:26:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:26:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:26:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:26:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:26:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:26:15,135 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:26:15,136 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:26:15,255 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:26:15,289 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:26:15,289 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 14:26:15,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:26:15 BoogieIcfgContainer [2023-04-02 14:26:15,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:26:15,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:26:15,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:26:15,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:26:15,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:26:14" (1/3) ... [2023-04-02 14:26:15,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c541250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:26:15, skipping insertion in model container [2023-04-02 14:26:15,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:26:15" (2/3) ... [2023-04-02 14:26:15,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c541250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:26:15, skipping insertion in model container [2023-04-02 14:26:15,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:26:15" (3/3) ... [2023-04-02 14:26:15,312 INFO L112 eAbstractionObserver]: Analyzing ICFG avg60-1.i [2023-04-02 14:26:15,324 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:26:15,324 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:26:15,398 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:26:15,405 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;@7d66afe8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:26:15,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:26:15,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:26:15,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 14:26:15,415 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:26:15,416 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:26:15,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:26:15,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:26:15,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1378679920, now seen corresponding path program 1 times [2023-04-02 14:26:15,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:26:15,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70609130] [2023-04-02 14:26:15,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:15,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:26:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 14:26:15,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:26:15,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70609130] [2023-04-02 14:26:15,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70609130] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:26:15,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:26:15,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:26:15,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188860511] [2023-04-02 14:26:15,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:26:15,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:26:15,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:26:15,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:26:15,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:26:15,744 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 14:26:15,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:26:15,773 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2023-04-02 14:26:15,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:26:15,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2023-04-02 14:26:15,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:26:15,779 INFO L225 Difference]: With dead ends: 41 [2023-04-02 14:26:15,780 INFO L226 Difference]: Without dead ends: 20 [2023-04-02 14:26:15,781 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 14:26:15,784 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:26:15,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:26:15,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-02 14:26:15,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-02 14:26:15,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:26:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-04-02 14:26:15,814 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2023-04-02 14:26:15,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:26:15,814 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-04-02 14:26:15,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 14:26:15,815 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-04-02 14:26:15,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 14:26:15,817 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:26:15,817 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:26:15,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 14:26:15,818 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:26:15,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:26:15,819 INFO L85 PathProgramCache]: Analyzing trace with hash -176704520, now seen corresponding path program 1 times [2023-04-02 14:26:15,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:26:15,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018228902] [2023-04-02 14:26:15,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:15,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:26:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 14:26:15,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:26:15,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018228902] [2023-04-02 14:26:15,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018228902] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:26:15,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167611936] [2023-04-02 14:26:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:15,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:15,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:26:15,967 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 14:26:15,973 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 14:26:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:16,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 14:26:16,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:26:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 14:26:16,113 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 14:26:16,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167611936] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:26:16,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 14:26:16,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-02 14:26:16,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746865737] [2023-04-02 14:26:16,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:26:16,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:26:16,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:26:16,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:26:16,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 14:26:16,123 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 14:26:16,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:26:16,149 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-04-02 14:26:16,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:26:16,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-04-02 14:26:16,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:26:16,152 INFO L225 Difference]: With dead ends: 33 [2023-04-02 14:26:16,152 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 14:26:16,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 14:26:16,155 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:26:16,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:26:16,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 14:26:16,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-02 14:26:16,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:26:16,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-04-02 14:26:16,166 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2023-04-02 14:26:16,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:26:16,166 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-04-02 14:26:16,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 14:26:16,167 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-04-02 14:26:16,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 14:26:16,168 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:26:16,168 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:26:16,175 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 14:26:16,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:16,375 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:26:16,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:26:16,376 INFO L85 PathProgramCache]: Analyzing trace with hash -799799483, now seen corresponding path program 1 times [2023-04-02 14:26:16,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:26:16,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852428054] [2023-04-02 14:26:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:16,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:26:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 14:26:16,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:26:16,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852428054] [2023-04-02 14:26:16,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852428054] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:26:16,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913515382] [2023-04-02 14:26:16,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:16,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:16,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:26:16,476 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 14:26:16,478 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 14:26:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:16,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 14:26:16,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:26:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:26:16,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 14:26:16,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913515382] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:26:16,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 14:26:16,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-02 14:26:16,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266189962] [2023-04-02 14:26:16,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:26:16,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:26:16,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:26:16,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:26:16,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 14:26:16,585 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 14:26:16,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:26:16,604 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-04-02 14:26:16,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:26:16,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-04-02 14:26:16,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:26:16,606 INFO L225 Difference]: With dead ends: 31 [2023-04-02 14:26:16,606 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 14:26:16,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 14:26:16,608 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:26:16,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:26:16,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 14:26:16,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-02 14:26:16,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:26:16,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-04-02 14:26:16,617 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2023-04-02 14:26:16,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:26:16,618 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-04-02 14:26:16,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 14:26:16,619 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-04-02 14:26:16,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 14:26:16,620 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:26:16,620 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:26:16,629 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 14:26:16,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 14:26:16,825 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:26:16,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:26:16,826 INFO L85 PathProgramCache]: Analyzing trace with hash 645167792, now seen corresponding path program 1 times [2023-04-02 14:26:16,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:26:16,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388440892] [2023-04-02 14:26:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:16,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:26:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 14:26:16,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:26:16,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388440892] [2023-04-02 14:26:16,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388440892] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:26:16,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441542528] [2023-04-02 14:26:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:16,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:16,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:26:16,883 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 14:26:16,885 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 14:26:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:16,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:26:16,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:26:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 14:26:16,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:26:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 14:26:17,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441542528] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:26:17,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [498938080] [2023-04-02 14:26:17,024 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:26:17,024 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:26:17,027 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:26:17,030 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:26:17,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:26:17,077 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:26:17,847 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 19 for LOIs [2023-04-02 14:26:17,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:26:17,889 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:26:18,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '631#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= 60 main_~i~1) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:26:18,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:26:18,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:26:18,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:26:18,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738176989] [2023-04-02 14:26:18,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:26:18,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:26:18,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:26:18,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:26:18,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-04-02 14:26:18,864 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:26:18,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:26:18,885 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-04-02 14:26:18,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:26:18,885 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 29 [2023-04-02 14:26:18,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:26:18,886 INFO L225 Difference]: With dead ends: 40 [2023-04-02 14:26:18,886 INFO L226 Difference]: Without dead ends: 25 [2023-04-02 14:26:18,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-04-02 14:26:18,887 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:26:18,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:26:18,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-02 14:26:18,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-02 14:26:18,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:26:18,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-02 14:26:18,890 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2023-04-02 14:26:18,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:26:18,890 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-02 14:26:18,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:26:18,890 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-02 14:26:18,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 14:26:18,890 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:26:18,891 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:26:18,898 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 14:26:19,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:19,098 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:26:19,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:26:19,098 INFO L85 PathProgramCache]: Analyzing trace with hash 2130012456, now seen corresponding path program 2 times [2023-04-02 14:26:19,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:26:19,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487647009] [2023-04-02 14:26:19,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:19,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:26:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 14:26:19,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:26:19,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487647009] [2023-04-02 14:26:19,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487647009] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:26:19,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123261988] [2023-04-02 14:26:19,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:26:19,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:19,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:26:19,149 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 14:26:19,151 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 14:26:19,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 14:26:19,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:26:19,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:26:19,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:26:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 14:26:19,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:26:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 14:26:19,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123261988] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:26:19,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [121608949] [2023-04-02 14:26:19,231 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:26:19,231 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:26:19,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:26:19,231 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:26:19,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:26:19,243 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:26:19,607 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 19 for LOIs [2023-04-02 14:26:19,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:26:19,639 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:26:20,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '950#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= 60 main_~i~1) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:26:20,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:26:20,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:26:20,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:26:20,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611051610] [2023-04-02 14:26:20,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:26:20,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:26:20,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:26:20,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:26:20,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-04-02 14:26:20,521 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:26:20,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:26:20,543 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-04-02 14:26:20,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:26:20,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 32 [2023-04-02 14:26:20,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:26:20,544 INFO L225 Difference]: With dead ends: 42 [2023-04-02 14:26:20,544 INFO L226 Difference]: Without dead ends: 28 [2023-04-02 14:26:20,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-04-02 14:26:20,545 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:26:20,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:26:20,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-02 14:26:20,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-02 14:26:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:26:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-04-02 14:26:20,548 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 32 [2023-04-02 14:26:20,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:26:20,548 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-04-02 14:26:20,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:26:20,548 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-04-02 14:26:20,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 14:26:20,549 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:26:20,549 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:26:20,559 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 14:26:20,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:20,753 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:26:20,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:26:20,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1996872369, now seen corresponding path program 3 times [2023-04-02 14:26:20,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:26:20,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583942971] [2023-04-02 14:26:20,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:20,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:26:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-04-02 14:26:20,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:26:20,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583942971] [2023-04-02 14:26:20,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583942971] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:26:20,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708433448] [2023-04-02 14:26:20,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:26:20,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:20,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:26:20,824 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 14:26:20,826 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 14:26:20,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:26:20,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:26:20,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:26:20,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:26:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-02 14:26:20,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:26:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-02 14:26:20,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708433448] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:26:20,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1247063591] [2023-04-02 14:26:20,969 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:26:20,969 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:26:20,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:26:20,969 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:26:20,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:26:20,980 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:26:21,321 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 19 for LOIs [2023-04-02 14:26:21,366 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:26:21,369 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:26:22,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1340#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= 60 main_~i~1) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:26:22,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:26:22,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:26:22,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-04-02 14:26:22,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524687705] [2023-04-02 14:26:22,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:26:22,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 14:26:22,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:26:22,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 14:26:22,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=713, Unknown=8, NotChecked=0, Total=870 [2023-04-02 14:26:22,297 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-02 14:26:22,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:26:22,347 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2023-04-02 14:26:22,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 14:26:22,348 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 41 [2023-04-02 14:26:22,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:26:22,349 INFO L225 Difference]: With dead ends: 53 [2023-04-02 14:26:22,349 INFO L226 Difference]: Without dead ends: 35 [2023-04-02 14:26:22,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=149, Invalid=713, Unknown=8, NotChecked=0, Total=870 [2023-04-02 14:26:22,351 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:26:22,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:26:22,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-02 14:26:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-02 14:26:22,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:26:22,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-04-02 14:26:22,360 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 41 [2023-04-02 14:26:22,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:26:22,360 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-04-02 14:26:22,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-02 14:26:22,360 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-04-02 14:26:22,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-02 14:26:22,361 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:26:22,361 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:26:22,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 14:26:22,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:22,567 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:26:22,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:26:22,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1939926096, now seen corresponding path program 4 times [2023-04-02 14:26:22,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:26:22,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037600864] [2023-04-02 14:26:22,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:22,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:26:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-02 14:26:22,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:26:22,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037600864] [2023-04-02 14:26:22,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037600864] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:26:22,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827697307] [2023-04-02 14:26:22,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:26:22,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:22,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:26:22,749 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 14:26:22,751 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 14:26:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:22,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:26:22,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:26:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-02 14:26:22,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:26:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-02 14:26:22,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827697307] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:26:22,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [688515467] [2023-04-02 14:26:22,994 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:26:22,994 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:26:22,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:26:22,994 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:26:22,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:26:23,005 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:26:23,312 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 19 for LOIs [2023-04-02 14:26:23,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:26:23,338 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:26:24,289 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1819#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= 60 main_~i~1) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:26:24,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:26:24,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:26:24,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 14:26:24,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887339010] [2023-04-02 14:26:24,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:26:24,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 14:26:24,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:26:24,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 14:26:24,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=1254, Unknown=8, NotChecked=0, Total=1640 [2023-04-02 14:26:24,291 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:26:24,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:26:24,333 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2023-04-02 14:26:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 14:26:24,333 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2023-04-02 14:26:24,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:26:24,334 INFO L225 Difference]: With dead ends: 66 [2023-04-02 14:26:24,334 INFO L226 Difference]: Without dead ends: 47 [2023-04-02 14:26:24,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=378, Invalid=1254, Unknown=8, NotChecked=0, Total=1640 [2023-04-02 14:26:24,335 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:26:24,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:26:24,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-02 14:26:24,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-02 14:26:24,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:26:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-04-02 14:26:24,341 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 48 [2023-04-02 14:26:24,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:26:24,342 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-04-02 14:26:24,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:26:24,342 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-04-02 14:26:24,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 14:26:24,343 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:26:24,343 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:26:24,349 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 14:26:24,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:24,545 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:26:24,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:26:24,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1920150960, now seen corresponding path program 5 times [2023-04-02 14:26:24,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:26:24,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674498769] [2023-04-02 14:26:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:24,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:26:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-02 14:26:25,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:26:25,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674498769] [2023-04-02 14:26:25,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674498769] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:26:25,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634860999] [2023-04-02 14:26:25,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:26:25,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:25,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:26:25,012 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 14:26:25,015 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 14:26:25,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:26:25,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:26:25,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:26:25,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:26:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-04-02 14:26:25,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:26:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-04-02 14:26:25,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634860999] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:26:25,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [496963891] [2023-04-02 14:26:25,279 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:26:25,280 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:26:25,280 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:26:25,280 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:26:25,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:26:25,306 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:26:25,617 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 19 for LOIs [2023-04-02 14:26:25,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:26:25,643 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:26:26,828 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2430#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= 60 main_~i~1) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:26:26,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:26:26,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:26:26,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-04-02 14:26:26,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136081961] [2023-04-02 14:26:26,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:26:26,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-02 14:26:26,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:26:26,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-02 14:26:26,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=2099, Unknown=8, NotChecked=0, Total=2550 [2023-04-02 14:26:26,830 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:26:26,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:26:26,899 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2023-04-02 14:26:26,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-02 14:26:26,899 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 60 [2023-04-02 14:26:26,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:26:26,900 INFO L225 Difference]: With dead ends: 73 [2023-04-02 14:26:26,900 INFO L226 Difference]: Without dead ends: 54 [2023-04-02 14:26:26,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=443, Invalid=2099, Unknown=8, NotChecked=0, Total=2550 [2023-04-02 14:26:26,902 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:26:26,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:26:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-02 14:26:26,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-04-02 14:26:26,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:26:26,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2023-04-02 14:26:26,913 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 60 [2023-04-02 14:26:26,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:26:26,914 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2023-04-02 14:26:26,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:26:26,914 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2023-04-02 14:26:26,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-02 14:26:26,915 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:26:26,915 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:26:26,920 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 14:26:27,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:27,120 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:26:27,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:26:27,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1954799608, now seen corresponding path program 6 times [2023-04-02 14:26:27,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:26:27,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061876815] [2023-04-02 14:26:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:27,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:26:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-02 14:26:27,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:26:27,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061876815] [2023-04-02 14:26:27,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061876815] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:26:27,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691802688] [2023-04-02 14:26:27,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:26:27,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:27,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:26:27,675 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 14:26:27,675 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 14:26:27,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:26:27,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:26:27,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 14:26:27,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:26:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-02 14:26:27,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:26:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-02 14:26:28,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691802688] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:26:28,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1264922773] [2023-04-02 14:26:28,400 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:26:28,400 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:26:28,400 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:26:28,400 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:26:28,400 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:26:28,410 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:26:28,724 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 19 for LOIs [2023-04-02 14:26:28,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:26:28,750 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:26:29,790 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3199#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= 60 main_~i~1) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:26:29,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:26:29,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:26:29,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-04-02 14:26:29,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744121512] [2023-04-02 14:26:29,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:26:29,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-02 14:26:29,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:26:29,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-02 14:26:29,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1353, Invalid=3061, Unknown=8, NotChecked=0, Total=4422 [2023-04-02 14:26:29,793 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:26:29,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:26:29,868 INFO L93 Difference]: Finished difference Result 104 states and 136 transitions. [2023-04-02 14:26:29,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-02 14:26:29,869 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 79 [2023-04-02 14:26:29,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:26:29,869 INFO L225 Difference]: With dead ends: 104 [2023-04-02 14:26:29,869 INFO L226 Difference]: Without dead ends: 79 [2023-04-02 14:26:29,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1353, Invalid=3061, Unknown=8, NotChecked=0, Total=4422 [2023-04-02 14:26:29,871 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:26:29,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:26:29,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-02 14:26:29,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-04-02 14:26:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:26:29,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2023-04-02 14:26:29,875 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 79 [2023-04-02 14:26:29,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:26:29,875 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2023-04-02 14:26:29,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:26:29,875 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2023-04-02 14:26:29,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-02 14:26:29,876 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:26:29,876 INFO L195 NwaCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:26:29,884 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 14:26:30,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-02 14:26:30,084 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:26:30,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:26:30,084 INFO L85 PathProgramCache]: Analyzing trace with hash -183362704, now seen corresponding path program 7 times [2023-04-02 14:26:30,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:26:30,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591267652] [2023-04-02 14:26:30,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:30,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:26:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-02 14:26:31,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:26:31,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591267652] [2023-04-02 14:26:31,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591267652] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:26:31,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13496267] [2023-04-02 14:26:31,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:26:31,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:31,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:26:31,752 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 14:26:31,754 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 14:26:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:31,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-02 14:26:31,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:26:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-02 14:26:31,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:26:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-02 14:26:33,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13496267] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:26:33,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1436694947] [2023-04-02 14:26:33,052 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:26:33,052 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:26:33,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:26:33,052 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:26:33,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:26:33,061 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:26:33,399 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 19 for LOIs [2023-04-02 14:26:33,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:26:33,431 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:26:34,726 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4242#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= 60 main_~i~1) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:26:34,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:26:34,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:26:34,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 63 [2023-04-02 14:26:34,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198145983] [2023-04-02 14:26:34,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:26:34,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-04-02 14:26:34,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:26:34,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-04-02 14:26:34,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2031, Invalid=4123, Unknown=8, NotChecked=0, Total=6162 [2023-04-02 14:26:34,730 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 63 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:26:34,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:26:34,789 INFO L93 Difference]: Finished difference Result 116 states and 135 transitions. [2023-04-02 14:26:34,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-04-02 14:26:34,790 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 63 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 104 [2023-04-02 14:26:34,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:26:34,790 INFO L225 Difference]: With dead ends: 116 [2023-04-02 14:26:34,790 INFO L226 Difference]: Without dead ends: 91 [2023-04-02 14:26:34,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 246 SyntacticMatches, 39 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2031, Invalid=4123, Unknown=8, NotChecked=0, Total=6162 [2023-04-02 14:26:34,792 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:26:34,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:26:34,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-04-02 14:26:34,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-04-02 14:26:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:26:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2023-04-02 14:26:34,796 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 104 [2023-04-02 14:26:34,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:26:34,797 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2023-04-02 14:26:34,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 63 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:26:34,797 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2023-04-02 14:26:34,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-04-02 14:26:34,797 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:26:34,798 INFO L195 NwaCegarLoop]: trace histogram [60, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:26:34,803 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 14:26:35,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 14:26:35,004 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:26:35,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:26:35,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1377042800, now seen corresponding path program 8 times [2023-04-02 14:26:35,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:26:35,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997980968] [2023-04-02 14:26:35,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:35,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:26:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2367 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 2068 trivial. 0 not checked. [2023-04-02 14:26:35,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:26:35,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997980968] [2023-04-02 14:26:35,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997980968] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:26:35,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043495534] [2023-04-02 14:26:35,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:26:35,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:35,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:26:35,301 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 14:26:35,320 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 14:26:35,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:26:35,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:26:35,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:26:35,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:26:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2367 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2023-04-02 14:26:35,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:26:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2364 trivial. 0 not checked. [2023-04-02 14:26:35,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043495534] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:26:35,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1425962022] [2023-04-02 14:26:35,476 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:26:35,476 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:26:35,476 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:26:35,477 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:26:35,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:26:35,485 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:26:35,762 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 19 for LOIs [2023-04-02 14:26:35,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:26:35,786 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:26:36,743 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5361#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= 60 main_~i~1) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:26:36,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:26:36,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:26:36,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-04-02 14:26:36,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969916234] [2023-04-02 14:26:36,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:26:36,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 14:26:36,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:26:36,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 14:26:36,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=999, Unknown=8, NotChecked=0, Total=1190 [2023-04-02 14:26:36,744 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:26:36,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:26:36,776 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2023-04-02 14:26:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 14:26:36,776 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-04-02 14:26:36,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:26:36,777 INFO L225 Difference]: With dead ends: 120 [2023-04-02 14:26:36,777 INFO L226 Difference]: Without dead ends: 96 [2023-04-02 14:26:36,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=183, Invalid=999, Unknown=8, NotChecked=0, Total=1190 [2023-04-02 14:26:36,778 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:26:36,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:26:36,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-02 14:26:36,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-04-02 14:26:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 88 states have internal predecessors, (91), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:26:36,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2023-04-02 14:26:36,783 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 116 [2023-04-02 14:26:36,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:26:36,783 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2023-04-02 14:26:36,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:26:36,783 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2023-04-02 14:26:36,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-02 14:26:36,784 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:26:36,784 INFO L195 NwaCegarLoop]: trace histogram [60, 33, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:26:36,789 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 14:26:36,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 14:26:36,989 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:26:36,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:26:36,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1501855757, now seen corresponding path program 9 times [2023-04-02 14:26:36,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:26:36,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527475419] [2023-04-02 14:26:36,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:36,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:26:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 0 proven. 356 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2023-04-02 14:26:37,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:26:37,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527475419] [2023-04-02 14:26:37,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527475419] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:26:37,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815684652] [2023-04-02 14:26:37,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:26:37,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:37,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:26:37,302 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 14:26:37,305 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 14:26:37,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:26:37,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:26:37,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 14:26:37,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:26:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 290 proven. 66 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2023-04-02 14:26:37,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:26:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 0 proven. 356 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2023-04-02 14:26:37,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815684652] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:26:37,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1415447089] [2023-04-02 14:26:37,697 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:26:37,697 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:26:37,697 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:26:37,697 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:26:37,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:26:37,708 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:26:37,999 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 19 for LOIs [2023-04-02 14:26:38,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:26:38,026 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:26:38,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6548#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= 60 main_~i~1) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:26:38,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:26:38,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:26:38,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-04-02 14:26:38,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263232257] [2023-04-02 14:26:38,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:26:38,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-02 14:26:38,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:26:38,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-02 14:26:38,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=1369, Unknown=8, NotChecked=0, Total=1806 [2023-04-02 14:26:38,936 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 14:26:38,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:26:38,978 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2023-04-02 14:26:38,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 14:26:38,979 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 123 [2023-04-02 14:26:38,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:26:38,979 INFO L225 Difference]: With dead ends: 138 [2023-04-02 14:26:38,980 INFO L226 Difference]: Without dead ends: 109 [2023-04-02 14:26:38,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 340 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=429, Invalid=1369, Unknown=8, NotChecked=0, Total=1806 [2023-04-02 14:26:38,980 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:26:38,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:26:38,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-04-02 14:26:38,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-04-02 14:26:38,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 101 states have internal predecessors, (104), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:26:38,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2023-04-02 14:26:38,985 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 123 [2023-04-02 14:26:38,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:26:38,986 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2023-04-02 14:26:38,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 14:26:38,986 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2023-04-02 14:26:38,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-02 14:26:38,986 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:26:38,986 INFO L195 NwaCegarLoop]: trace histogram [72, 60, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:26:38,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 14:26:39,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 14:26:39,189 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:26:39,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:26:39,189 INFO L85 PathProgramCache]: Analyzing trace with hash 290513744, now seen corresponding path program 10 times [2023-04-02 14:26:39,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:26:39,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734619076] [2023-04-02 14:26:39,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:39,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:26:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2023-04-02 14:26:39,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:26:39,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734619076] [2023-04-02 14:26:39,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734619076] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:26:39,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856127503] [2023-04-02 14:26:39,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:26:39,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:39,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:26:39,832 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:26:39,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 14:26:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:40,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 14:26:40,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:26:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 1252 proven. 300 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2023-04-02 14:26:40,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:26:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2023-04-02 14:26:40,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856127503] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:26:40,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [712198797] [2023-04-02 14:26:40,699 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:26:40,699 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:26:40,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:26:40,699 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:26:40,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:26:40,718 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:26:41,008 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 19 for LOIs [2023-04-02 14:26:41,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:26:41,032 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:26:42,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8057#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= 60 main_~i~1) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:26:42,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:26:42,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:26:42,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-04-02 14:26:42,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887454250] [2023-04-02 14:26:42,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:26:42,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-04-02 14:26:42,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:26:42,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-04-02 14:26:42,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=3228, Unknown=8, NotChecked=0, Total=4692 [2023-04-02 14:26:42,107 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 14:26:42,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:26:42,180 INFO L93 Difference]: Finished difference Result 177 states and 212 transitions. [2023-04-02 14:26:42,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-04-02 14:26:42,180 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 162 [2023-04-02 14:26:42,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:26:42,181 INFO L225 Difference]: With dead ends: 177 [2023-04-02 14:26:42,181 INFO L226 Difference]: Without dead ends: 135 [2023-04-02 14:26:42,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 444 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1456, Invalid=3228, Unknown=8, NotChecked=0, Total=4692 [2023-04-02 14:26:42,183 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:26:42,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:26:42,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-04-02 14:26:42,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-04-02 14:26:42,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:26:42,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2023-04-02 14:26:42,188 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 162 [2023-04-02 14:26:42,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:26:42,188 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2023-04-02 14:26:42,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 14:26:42,188 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2023-04-02 14:26:42,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2023-04-02 14:26:42,190 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:26:42,190 INFO L195 NwaCegarLoop]: trace histogram [150, 60, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:26:42,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 14:26:42,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 14:26:42,399 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:26:42,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:26:42,400 INFO L85 PathProgramCache]: Analyzing trace with hash 111535408, now seen corresponding path program 11 times [2023-04-02 14:26:42,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:26:42,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850621273] [2023-04-02 14:26:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:42,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:26:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 13485 backedges. 0 proven. 6479 refuted. 0 times theorem prover too weak. 7006 trivial. 0 not checked. [2023-04-02 14:26:44,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:26:44,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850621273] [2023-04-02 14:26:44,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850621273] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:26:44,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870260963] [2023-04-02 14:26:44,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:26:44,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:44,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:26:44,297 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:26:44,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 14:26:44,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-02 14:26:44,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:26:44,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 14:26:44,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:26:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13485 backedges. 5206 proven. 21 refuted. 0 times theorem prover too weak. 8258 trivial. 0 not checked. [2023-04-02 14:26:44,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:26:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 13485 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13464 trivial. 0 not checked. [2023-04-02 14:26:44,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870260963] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:26:44,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2018617582] [2023-04-02 14:26:44,861 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:26:44,861 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:26:44,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:26:44,861 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:26:44,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:26:44,870 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:26:45,162 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 19 for LOIs [2023-04-02 14:26:45,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:26:45,196 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:26:46,584 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10178#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= 60 main_~i~1) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:26:46,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:26:46,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:26:46,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 9, 9] total 67 [2023-04-02 14:26:46,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359460195] [2023-04-02 14:26:46,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:26:46,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-04-02 14:26:46,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:26:46,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-04-02 14:26:46,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1575, Invalid=5223, Unknown=8, NotChecked=0, Total=6806 [2023-04-02 14:26:46,587 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 67 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 67 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:26:46,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:26:46,663 INFO L93 Difference]: Finished difference Result 212 states and 230 transitions. [2023-04-02 14:26:46,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-04-02 14:26:46,663 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 67 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 240 [2023-04-02 14:26:46,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:26:46,664 INFO L225 Difference]: With dead ends: 212 [2023-04-02 14:26:46,664 INFO L226 Difference]: Without dead ends: 144 [2023-04-02 14:26:46,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 690 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1912 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1575, Invalid=5223, Unknown=8, NotChecked=0, Total=6806 [2023-04-02 14:26:46,666 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:26:46,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 166 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:26:46,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-04-02 14:26:46,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2023-04-02 14:26:46,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:26:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2023-04-02 14:26:46,673 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 240 [2023-04-02 14:26:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:26:46,673 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2023-04-02 14:26:46,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 67 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:26:46,673 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2023-04-02 14:26:46,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-04-02 14:26:46,675 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:26:46,675 INFO L195 NwaCegarLoop]: trace histogram [153, 60, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:26:46,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-02 14:26:46,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-02 14:26:46,881 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:26:46,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:26:46,881 INFO L85 PathProgramCache]: Analyzing trace with hash -470708723, now seen corresponding path program 12 times [2023-04-02 14:26:46,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:26:46,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449616219] [2023-04-02 14:26:46,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:46,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:26:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 14031 backedges. 0 proven. 6736 refuted. 0 times theorem prover too weak. 7295 trivial. 0 not checked. [2023-04-02 14:26:48,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:26:48,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449616219] [2023-04-02 14:26:48,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449616219] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:26:48,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953891574] [2023-04-02 14:26:48,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:26:48,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:48,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:26:48,787 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:26:48,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-02 14:26:49,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:26:49,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:26:49,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 1544 conjuncts, 53 conjunts are in the unsatisfiable core [2023-04-02 14:26:49,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:26:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 14031 backedges. 5410 proven. 1326 refuted. 0 times theorem prover too weak. 7295 trivial. 0 not checked. [2023-04-02 14:26:49,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:26:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14031 backedges. 0 proven. 6736 refuted. 0 times theorem prover too weak. 7295 trivial. 0 not checked. [2023-04-02 14:26:50,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953891574] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:26:50,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [408798778] [2023-04-02 14:26:50,293 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:26:50,293 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:26:50,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:26:50,293 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:26:50,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:26:50,310 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:26:50,609 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 19 for LOIs [2023-04-02 14:26:50,630 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:26:50,632 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:26:51,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12449#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= 60 main_~i~1) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:26:51,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:26:51,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:26:51,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 63 [2023-04-02 14:26:51,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311171293] [2023-04-02 14:26:51,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:26:51,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-04-02 14:26:51,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:26:51,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-04-02 14:26:51,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2031, Invalid=4123, Unknown=8, NotChecked=0, Total=6162 [2023-04-02 14:26:51,976 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 14:26:52,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:26:52,038 INFO L93 Difference]: Finished difference Result 230 states and 248 transitions. [2023-04-02 14:26:52,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-04-02 14:26:52,038 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 251 [2023-04-02 14:26:52,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:26:52,039 INFO L225 Difference]: With dead ends: 230 [2023-04-02 14:26:52,039 INFO L226 Difference]: Without dead ends: 153 [2023-04-02 14:26:52,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 684 SyntacticMatches, 45 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2697 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2031, Invalid=4123, Unknown=8, NotChecked=0, Total=6162 [2023-04-02 14:26:52,040 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:26:52,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:26:52,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-04-02 14:26:52,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2023-04-02 14:26:52,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 145 states have internal predecessors, (148), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:26:52,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2023-04-02 14:26:52,046 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 251 [2023-04-02 14:26:52,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:26:52,046 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2023-04-02 14:26:52,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 14:26:52,046 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2023-04-02 14:26:52,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2023-04-02 14:26:52,048 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:26:52,048 INFO L195 NwaCegarLoop]: trace histogram [180, 60, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:26:52,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-02 14:26:52,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:52,256 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:26:52,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:26:52,256 INFO L85 PathProgramCache]: Analyzing trace with hash -744110960, now seen corresponding path program 13 times [2023-04-02 14:26:52,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:26:52,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000202585] [2023-04-02 14:26:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:52,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:26:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 18594 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2023-04-02 14:26:52,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:26:52,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000202585] [2023-04-02 14:26:52,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000202585] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:26:52,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279641584] [2023-04-02 14:26:52,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:26:52,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:52,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:26:52,890 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:26:52,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-02 14:26:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:53,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 1679 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 14:26:53,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:26:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18594 backedges. 7446 proven. 105 refuted. 0 times theorem prover too weak. 11043 trivial. 0 not checked. [2023-04-02 14:26:53,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:26:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18594 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2023-04-02 14:26:53,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279641584] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:26:53,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [244140570] [2023-04-02 14:26:53,516 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:26:53,516 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:26:53,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:26:53,516 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:26:53,516 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:26:53,524 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:26:53,818 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 19 for LOIs [2023-04-02 14:26:53,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:26:53,841 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:26:54,811 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14906#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= 60 main_~i~1) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:26:54,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:26:54,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:26:54,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-04-02 14:26:54,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842226865] [2023-04-02 14:26:54,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:26:54,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-02 14:26:54,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:26:54,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-02 14:26:54,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=1738, Unknown=8, NotChecked=0, Total=2352 [2023-04-02 14:26:54,813 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 14:26:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:26:54,848 INFO L93 Difference]: Finished difference Result 237 states and 257 transitions. [2023-04-02 14:26:54,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-02 14:26:54,848 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 278 [2023-04-02 14:26:54,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:26:54,849 INFO L225 Difference]: With dead ends: 237 [2023-04-02 14:26:54,849 INFO L226 Difference]: Without dead ends: 169 [2023-04-02 14:26:54,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 850 GetRequests, 802 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=606, Invalid=1738, Unknown=8, NotChecked=0, Total=2352 [2023-04-02 14:26:54,850 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:26:54,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:26:54,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-04-02 14:26:54,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-04-02 14:26:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 161 states have (on average 1.0186335403726707) internal successors, (164), 161 states have internal predecessors, (164), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:26:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2023-04-02 14:26:54,856 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 278 [2023-04-02 14:26:54,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:26:54,859 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2023-04-02 14:26:54,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 14:26:54,859 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2023-04-02 14:26:54,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-04-02 14:26:54,860 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:26:54,861 INFO L195 NwaCegarLoop]: trace histogram [180, 60, 30, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:26:54,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-04-02 14:26:55,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-02 14:26:55,067 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:26:55,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:26:55,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1678269040, now seen corresponding path program 14 times [2023-04-02 14:26:55,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:26:55,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886712658] [2023-04-02 14:26:55,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:26:55,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:26:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:26:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 18954 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2023-04-02 14:26:56,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:26:56,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886712658] [2023-04-02 14:26:56,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886712658] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:26:56,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562660945] [2023-04-02 14:26:56,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:26:56,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:26:56,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:26:56,178 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:26:56,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-02 14:27:12,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2023-04-02 14:27:12,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:27:12,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 55 conjunts are in the unsatisfiable core [2023-04-02 14:27:12,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:27:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18954 backedges. 7446 proven. 465 refuted. 0 times theorem prover too weak. 11043 trivial. 0 not checked. [2023-04-02 14:27:12,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:27:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18954 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2023-04-02 14:27:13,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562660945] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:27:13,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1501996470] [2023-04-02 14:27:13,104 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:27:13,104 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:27:13,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:27:13,104 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:27:13,104 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:27:13,113 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:27:13,396 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 19 for LOIs [2023-04-02 14:27:13,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:27:13,423 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:27:14,543 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17536#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= 60 main_~i~1) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:27:14,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:27:14,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:27:14,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 62 [2023-04-02 14:27:14,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622552702] [2023-04-02 14:27:14,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:27:14,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-04-02 14:27:14,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:27:14,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-04-02 14:27:14,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1969, Invalid=4029, Unknown=8, NotChecked=0, Total=6006 [2023-04-02 14:27:14,545 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand has 62 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 62 states have internal predecessors, (78), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 14:27:14,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:27:14,598 INFO L93 Difference]: Finished difference Result 266 states and 299 transitions. [2023-04-02 14:27:14,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-04-02 14:27:14,601 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 62 states have internal predecessors, (78), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 294 [2023-04-02 14:27:14,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:27:14,602 INFO L225 Difference]: With dead ends: 266 [2023-04-02 14:27:14,602 INFO L226 Difference]: Without dead ends: 198 [2023-04-02 14:27:14,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 834 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1969, Invalid=4029, Unknown=8, NotChecked=0, Total=6006 [2023-04-02 14:27:14,603 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:27:14,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:27:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-04-02 14:27:14,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2023-04-02 14:27:14,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 190 states have (on average 1.0157894736842106) internal successors, (193), 190 states have internal predecessors, (193), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:27:14,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2023-04-02 14:27:14,609 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 294 [2023-04-02 14:27:14,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:27:14,609 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2023-04-02 14:27:14,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 62 states have internal predecessors, (78), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 14:27:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2023-04-02 14:27:14,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2023-04-02 14:27:14,611 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:27:14,611 INFO L195 NwaCegarLoop]: trace histogram [180, 60, 59, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:27:14,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-02 14:27:14,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 14:27:14,834 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:27:14,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:27:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash -502317423, now seen corresponding path program 15 times [2023-04-02 14:27:14,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:27:14,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324763501] [2023-04-02 14:27:14,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:27:14,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:28:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat