/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/loop-zilu/benchmark23_conjunctive.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:29:14,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:29:14,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:29:14,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:29:14,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:29:14,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:29:14,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:29:14,600 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:29:14,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:29:14,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:29:14,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:29:14,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:29:14,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:29:14,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:29:14,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:29:14,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:29:14,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:29:14,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:29:14,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:29:14,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:29:14,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:29:14,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:29:14,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:29:14,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:29:14,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 22:29:14,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 22:29:14,628 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 22:29:14,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 22:29:14,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 22:29:14,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 22:29:14,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:29:14,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:29:14,630 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:29:14,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:29:14,631 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:29:14,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:29:14,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:29:14,632 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:29:14,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:29:14,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:29:14,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:29:14,645 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 22:29:14,657 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:29:14,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:29:14,658 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:29:14,658 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:29:14,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:29:14,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:29:14,658 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:29:14,659 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:29:14,659 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:29:14,659 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:29:14,659 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:29:14,659 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:29:14,659 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:29:14,659 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:29:14,659 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:29:14,659 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:29:14,659 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:29:14,659 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:29:14,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:29:14,660 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:29:14,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:29:14,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:29:14,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:29:14,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:29:14,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:29:14,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:29:14,660 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:29:14,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:29:14,661 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:29:14,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:29:14,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:29:14,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:29:14,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:29:14,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:29:14,661 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:29:14,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:29:14,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:29:14,661 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:29:14,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:29:14,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:29:14,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:29:14,662 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:29:14,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:29:14,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:29:14,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:29:14,872 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:29:14,872 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:29:14,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i [2023-04-02 22:29:15,916 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:29:16,108 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:29:16,108 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i [2023-04-02 22:29:16,112 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaabcc2e8/3047abee91ee4aa5ad0b3027abc6f4c2/FLAG513be1f45 [2023-04-02 22:29:16,130 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaabcc2e8/3047abee91ee4aa5ad0b3027abc6f4c2 [2023-04-02 22:29:16,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:29:16,133 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:29:16,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:29:16,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:29:16,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:29:16,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:29:16" (1/1) ... [2023-04-02 22:29:16,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16b25550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:29:16, skipping insertion in model container [2023-04-02 22:29:16,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:29:16" (1/1) ... [2023-04-02 22:29:16,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:29:16,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:29:16,269 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/loop-zilu/benchmark23_conjunctive.i[873,886] [2023-04-02 22:29:16,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:29:16,281 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:29:16,289 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/loop-zilu/benchmark23_conjunctive.i[873,886] [2023-04-02 22:29:16,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:29:16,299 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:29:16,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:29:16 WrapperNode [2023-04-02 22:29:16,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:29:16,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:29:16,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:29:16,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:29:16,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:29:16" (1/1) ... [2023-04-02 22:29:16,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:29:16" (1/1) ... [2023-04-02 22:29:16,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:29:16" (1/1) ... [2023-04-02 22:29:16,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:29:16" (1/1) ... [2023-04-02 22:29:16,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:29:16" (1/1) ... [2023-04-02 22:29:16,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:29:16" (1/1) ... [2023-04-02 22:29:16,316 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:29:16" (1/1) ... [2023-04-02 22:29:16,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:29:16" (1/1) ... [2023-04-02 22:29:16,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:29:16,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:29:16,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:29:16,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:29:16,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:29:16" (1/1) ... [2023-04-02 22:29:16,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:29:16,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:29:16,341 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 22:29:16,394 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 22:29:16,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:29:16,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:29:16,437 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:29:16,437 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:29:16,440 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:29:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:29:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 22:29:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 22:29:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:29:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:29:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 22:29:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 22:29:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:29:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:29:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:29:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:29:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:29:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:29:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:29:16,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:29:16,499 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:29:16,502 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:29:16,615 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:29:16,627 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:29:16,627 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 22:29:16,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:29:16 BoogieIcfgContainer [2023-04-02 22:29:16,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:29:16,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:29:16,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:29:16,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:29:16,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:29:16" (1/3) ... [2023-04-02 22:29:16,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d248f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:29:16, skipping insertion in model container [2023-04-02 22:29:16,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:29:16" (2/3) ... [2023-04-02 22:29:16,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d248f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:29:16, skipping insertion in model container [2023-04-02 22:29:16,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:29:16" (3/3) ... [2023-04-02 22:29:16,634 INFO L112 eAbstractionObserver]: Analyzing ICFG benchmark23_conjunctive.i [2023-04-02 22:29:16,645 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:29:16,645 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:29:16,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:29:16,677 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;@68e97255, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:29:16,678 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:29:16,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 22:29:16,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 22:29:16,685 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:29:16,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:29:16,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:29:16,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:29:16,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1357240066, now seen corresponding path program 1 times [2023-04-02 22:29:16,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:29:16,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144421760] [2023-04-02 22:29:16,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:29:16,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:29:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:29:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:16,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:29:16,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144421760] [2023-04-02 22:29:16,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144421760] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:29:16,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:29:16,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 22:29:16,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627562686] [2023-04-02 22:29:16,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:29:16,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 22:29:16,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:29:16,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 22:29:16,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:29:16,912 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:16,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:29:16,936 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-04-02 22:29:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 22:29:16,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-02 22:29:16,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:29:16,942 INFO L225 Difference]: With dead ends: 32 [2023-04-02 22:29:16,942 INFO L226 Difference]: Without dead ends: 13 [2023-04-02 22:29:16,944 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 22:29:16,951 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:29:16,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:29:16,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-04-02 22:29:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-04-02 22:29:16,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:16,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2023-04-02 22:29:16,981 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2023-04-02 22:29:16,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:29:16,983 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2023-04-02 22:29:16,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:16,983 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2023-04-02 22:29:16,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 22:29:16,984 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:29:16,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:29:16,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 22:29:16,984 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:29:16,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:29:16,988 INFO L85 PathProgramCache]: Analyzing trace with hash 51745214, now seen corresponding path program 1 times [2023-04-02 22:29:16,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:29:16,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445830018] [2023-04-02 22:29:16,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:29:16,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:29:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:29:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:17,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:29:17,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445830018] [2023-04-02 22:29:17,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445830018] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:29:17,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447486132] [2023-04-02 22:29:17,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:29:17,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:29:17,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:29:17,085 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 22:29:17,128 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 22:29:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:29:17,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 22:29:17,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:29:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:17,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:29:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:17,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447486132] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:29:17,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1628514168] [2023-04-02 22:29:17,254 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:29:17,254 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:29:17,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:29:17,261 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:29:17,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:29:17,356 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:29:17,446 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-02 22:29:17,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:29:17,473 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:29:17,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '163#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:29:17,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:29:17,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:29:17,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-04-02 22:29:17,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257689143] [2023-04-02 22:29:17,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:29:17,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 22:29:17,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:29:17,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 22:29:17,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-04-02 22:29:17,671 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:17,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:29:17,688 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2023-04-02 22:29:17,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 22:29:17,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-02 22:29:17,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:29:17,689 INFO L225 Difference]: With dead ends: 21 [2023-04-02 22:29:17,689 INFO L226 Difference]: Without dead ends: 16 [2023-04-02 22:29:17,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-04-02 22:29:17,692 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:29:17,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:29:17,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-04-02 22:29:17,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-04-02 22:29:17,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:17,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2023-04-02 22:29:17,699 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2023-04-02 22:29:17,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:29:17,699 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2023-04-02 22:29:17,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:17,699 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2023-04-02 22:29:17,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 22:29:17,700 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:29:17,700 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:29:17,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 22:29:17,905 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 22:29:17,905 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:29:17,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:29:17,907 INFO L85 PathProgramCache]: Analyzing trace with hash -2029102850, now seen corresponding path program 2 times [2023-04-02 22:29:17,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:29:17,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586009805] [2023-04-02 22:29:17,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:29:17,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:29:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:29:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:18,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:29:18,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586009805] [2023-04-02 22:29:18,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586009805] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:29:18,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024342258] [2023-04-02 22:29:18,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:29:18,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:29:18,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:29:18,063 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 22:29:18,064 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 22:29:18,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 22:29:18,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:29:18,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 22:29:18,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:29:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:18,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:29:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:18,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024342258] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:29:18,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1820059390] [2023-04-02 22:29:18,177 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:29:18,177 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:29:18,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:29:18,177 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:29:18,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:29:18,215 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:29:18,249 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-02 22:29:18,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:29:18,267 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:29:18,438 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '332#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:29:18,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:29:18,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:29:18,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-04-02 22:29:18,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437450425] [2023-04-02 22:29:18,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:29:18,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 22:29:18,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:29:18,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 22:29:18,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-04-02 22:29:18,440 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:18,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:29:18,454 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2023-04-02 22:29:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 22:29:18,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-02 22:29:18,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:29:18,456 INFO L225 Difference]: With dead ends: 27 [2023-04-02 22:29:18,456 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 22:29:18,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-04-02 22:29:18,458 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:29:18,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:29:18,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 22:29:18,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-02 22:29:18,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:18,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2023-04-02 22:29:18,466 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 15 [2023-04-02 22:29:18,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:29:18,466 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2023-04-02 22:29:18,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:18,467 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2023-04-02 22:29:18,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 22:29:18,467 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:29:18,467 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:29:18,487 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 22:29:18,672 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 22:29:18,672 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:29:18,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:29:18,673 INFO L85 PathProgramCache]: Analyzing trace with hash 373268734, now seen corresponding path program 3 times [2023-04-02 22:29:18,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:29:18,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16331578] [2023-04-02 22:29:18,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:29:18,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:29:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:29:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:18,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:29:18,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16331578] [2023-04-02 22:29:18,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16331578] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:29:18,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122040931] [2023-04-02 22:29:18,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:29:18,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:29:18,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:29:18,837 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 22:29:18,839 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 22:29:18,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:29:18,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:29:18,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 22:29:18,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:29:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:18,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:29:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:19,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122040931] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:29:19,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [461691722] [2023-04-02 22:29:19,079 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:29:19,079 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:29:19,079 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:29:19,079 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:29:19,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:29:19,110 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:29:19,128 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-02 22:29:19,137 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:29:19,140 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:29:19,323 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '574#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:29:19,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:29:19,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:29:19,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 22:29:19,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754272837] [2023-04-02 22:29:19,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:29:19,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 22:29:19,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:29:19,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 22:29:19,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=793, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 22:29:19,325 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:29:19,349 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2023-04-02 22:29:19,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 22:29:19,349 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-02 22:29:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:29:19,350 INFO L225 Difference]: With dead ends: 39 [2023-04-02 22:29:19,350 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 22:29:19,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=329, Invalid=793, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 22:29:19,351 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:29:19,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:29:19,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 22:29:19,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-02 22:29:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:19,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2023-04-02 22:29:19,354 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 21 [2023-04-02 22:29:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:29:19,354 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2023-04-02 22:29:19,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2023-04-02 22:29:19,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 22:29:19,355 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:29:19,355 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:29:19,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 22:29:19,559 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 22:29:19,560 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:29:19,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:29:19,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1528811266, now seen corresponding path program 4 times [2023-04-02 22:29:19,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:29:19,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435662836] [2023-04-02 22:29:19,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:29:19,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:29:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:29:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:19,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:29:19,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435662836] [2023-04-02 22:29:19,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435662836] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:29:19,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809323354] [2023-04-02 22:29:19,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 22:29:19,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:29:19,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:29:19,955 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 22:29:19,957 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 22:29:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:29:20,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 22:29:20,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:29:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:20,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:29:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:20,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809323354] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:29:20,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [83814861] [2023-04-02 22:29:20,631 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:29:20,631 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:29:20,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:29:20,631 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:29:20,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:29:20,643 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:29:20,658 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-02 22:29:20,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:29:20,666 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:29:20,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '960#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:29:20,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:29:20,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:29:20,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-02 22:29:20,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590519866] [2023-04-02 22:29:20,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:29:20,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-02 22:29:20,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:29:20,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-02 22:29:20,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2101, Unknown=0, NotChecked=0, Total=3306 [2023-04-02 22:29:20,906 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:20,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:29:20,950 INFO L93 Difference]: Finished difference Result 63 states and 86 transitions. [2023-04-02 22:29:20,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-02 22:29:20,951 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2023-04-02 22:29:20,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:29:20,951 INFO L225 Difference]: With dead ends: 63 [2023-04-02 22:29:20,952 INFO L226 Difference]: Without dead ends: 58 [2023-04-02 22:29:20,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1205, Invalid=2101, Unknown=0, NotChecked=0, Total=3306 [2023-04-02 22:29:20,953 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:29:20,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:29:20,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-04-02 22:29:20,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-04-02 22:29:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:20,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2023-04-02 22:29:20,961 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 33 [2023-04-02 22:29:20,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:29:20,961 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2023-04-02 22:29:20,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:20,961 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2023-04-02 22:29:20,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-02 22:29:20,962 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:29:20,962 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:29:20,969 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 22:29:21,167 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 22:29:21,167 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:29:21,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:29:21,167 INFO L85 PathProgramCache]: Analyzing trace with hash -786870018, now seen corresponding path program 5 times [2023-04-02 22:29:21,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:29:21,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092120879] [2023-04-02 22:29:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:29:21,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:29:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:29:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:22,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:29:22,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092120879] [2023-04-02 22:29:22,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092120879] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:29:22,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833503280] [2023-04-02 22:29:22,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:29:22,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:29:22,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:29:22,418 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 22:29:22,419 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 22:29:22,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-04-02 22:29:22,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:29:22,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-02 22:29:22,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:29:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:22,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:29:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:24,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833503280] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:29:24,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [622611397] [2023-04-02 22:29:24,503 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:29:24,503 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:29:24,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:29:24,503 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:29:24,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:29:24,530 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:29:24,544 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-02 22:29:24,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:29:24,551 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:29:24,850 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1634#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:29:24,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:29:24,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:29:24,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2023-04-02 22:29:24,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69158071] [2023-04-02 22:29:24,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:29:24,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-04-02 22:29:24,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:29:24,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-04-02 22:29:24,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4685, Invalid=6445, Unknown=0, NotChecked=0, Total=11130 [2023-04-02 22:29:24,857 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:24,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:29:24,949 INFO L93 Difference]: Finished difference Result 111 states and 158 transitions. [2023-04-02 22:29:24,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-04-02 22:29:24,950 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-02 22:29:24,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:29:24,951 INFO L225 Difference]: With dead ends: 111 [2023-04-02 22:29:24,951 INFO L226 Difference]: Without dead ends: 106 [2023-04-02 22:29:24,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4685, Invalid=6445, Unknown=0, NotChecked=0, Total=11130 [2023-04-02 22:29:24,953 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:29:24,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:29:24,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-04-02 22:29:24,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-04-02 22:29:24,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.00990099009901) internal successors, (102), 101 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2023-04-02 22:29:24,978 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 57 [2023-04-02 22:29:24,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:29:24,979 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2023-04-02 22:29:24,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:24,979 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2023-04-02 22:29:24,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-02 22:29:24,985 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:29:24,985 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:29:25,003 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 22:29:25,192 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 22:29:25,192 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:29:25,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:29:25,193 INFO L85 PathProgramCache]: Analyzing trace with hash -714370818, now seen corresponding path program 6 times [2023-04-02 22:29:25,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:29:25,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088066805] [2023-04-02 22:29:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:29:25,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:29:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:29:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:28,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:29:28,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088066805] [2023-04-02 22:29:28,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088066805] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:29:28,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722213694] [2023-04-02 22:29:28,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:29:28,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:29:28,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:29:28,447 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 22:29:28,449 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 22:29:28,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:29:28,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:29:28,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 96 conjunts are in the unsatisfiable core [2023-04-02 22:29:28,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:29:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:28,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:29:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:31,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722213694] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:29:31,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [616160770] [2023-04-02 22:29:31,457 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:29:31,457 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:29:31,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:29:31,457 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:29:31,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:29:31,476 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:29:31,496 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-02 22:29:31,502 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:29:31,504 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:29:31,868 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2793#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:29:31,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:29:31,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:29:31,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 102 [2023-04-02 22:29:31,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963031741] [2023-04-02 22:29:31,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:29:31,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-04-02 22:29:31,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:29:31,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-04-02 22:29:31,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5180, Invalid=7030, Unknown=0, NotChecked=0, Total=12210 [2023-04-02 22:29:31,875 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand has 102 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 102 states have internal predecessors, (108), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:31,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:29:31,990 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2023-04-02 22:29:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-04-02 22:29:31,990 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 102 states have internal predecessors, (108), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2023-04-02 22:29:31,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:29:31,991 INFO L225 Difference]: With dead ends: 117 [2023-04-02 22:29:31,991 INFO L226 Difference]: Without dead ends: 112 [2023-04-02 22:29:31,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 212 SyntacticMatches, 90 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5389 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5180, Invalid=7030, Unknown=0, NotChecked=0, Total=12210 [2023-04-02 22:29:31,994 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:29:31,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:29:31,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-04-02 22:29:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-04-02 22:29:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 107 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2023-04-02 22:29:32,000 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 105 [2023-04-02 22:29:32,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:29:32,001 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2023-04-02 22:29:32,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 102 states have internal predecessors, (108), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:32,001 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2023-04-02 22:29:32,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-02 22:29:32,002 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:29:32,002 INFO L195 NwaCegarLoop]: trace histogram [100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:29:32,011 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 22:29:32,207 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 22:29:32,207 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:29:32,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:29:32,208 INFO L85 PathProgramCache]: Analyzing trace with hash -942483202, now seen corresponding path program 7 times [2023-04-02 22:29:32,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:29:32,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872423745] [2023-04-02 22:29:32,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:29:32,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:29:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:29:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:37,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:29:37,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872423745] [2023-04-02 22:29:37,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872423745] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:29:37,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577855718] [2023-04-02 22:29:37,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 22:29:37,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:29:37,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:29:37,127 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 22:29:37,163 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 22:29:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:29:37,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 208 conjunts are in the unsatisfiable core [2023-04-02 22:29:37,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:29:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:37,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:29:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:38,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577855718] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:29:38,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [342886086] [2023-04-02 22:29:38,112 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:29:38,112 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:29:38,112 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:29:38,112 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:29:38,113 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:29:38,122 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:29:38,135 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-02 22:29:38,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:29:38,165 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:29:39,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4017#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:29:39,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:29:39,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:29:39,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105, 105] total 107 [2023-04-02 22:29:39,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001446588] [2023-04-02 22:29:39,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:29:39,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-04-02 22:29:39,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:29:39,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-04-02 22:29:39,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=13098, Unknown=0, NotChecked=0, Total=13340 [2023-04-02 22:29:39,066 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand has 107 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 105 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:42,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:29:42,232 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2023-04-02 22:29:42,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-04-02 22:29:42,233 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 105 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2023-04-02 22:29:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:29:42,233 INFO L225 Difference]: With dead ends: 118 [2023-04-02 22:29:42,233 INFO L226 Difference]: Without dead ends: 113 [2023-04-02 22:29:42,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 319 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=248, Invalid=13324, Unknown=0, NotChecked=0, Total=13572 [2023-04-02 22:29:42,235 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 11021 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 11021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:29:42,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 526 Invalid, 11021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11021 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-02 22:29:42,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-04-02 22:29:42,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-04-02 22:29:42,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:42,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2023-04-02 22:29:42,242 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2023-04-02 22:29:42,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:29:42,242 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2023-04-02 22:29:42,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 105 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:42,242 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2023-04-02 22:29:42,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-02 22:29:42,243 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:29:42,243 INFO L195 NwaCegarLoop]: trace histogram [101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:29:42,249 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 22:29:42,448 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 22:29:42,449 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:29:42,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:29:42,449 INFO L85 PathProgramCache]: Analyzing trace with hash 24306110, now seen corresponding path program 8 times [2023-04-02 22:29:42,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:29:42,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391460323] [2023-04-02 22:29:42,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:29:42,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:29:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:29:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 5151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:29:46,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:29:46,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391460323] [2023-04-02 22:29:46,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391460323] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:29:46,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:29:46,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2023-04-02 22:29:46,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212152294] [2023-04-02 22:29:46,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:29:46,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2023-04-02 22:29:46,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:29:46,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2023-04-02 22:29:46,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2023-04-02 22:29:46,196 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 103 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:46,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:29:46,429 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2023-04-02 22:29:46,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-04-02 22:29:46,429 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2023-04-02 22:29:46,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:29:46,431 INFO L225 Difference]: With dead ends: 113 [2023-04-02 22:29:46,431 INFO L226 Difference]: Without dead ends: 0 [2023-04-02 22:29:46,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2023-04-02 22:29:46,434 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:29:46,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:29:46,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-02 22:29:46,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-02 22:29:46,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-02 22:29:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-02 22:29:46,435 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 112 [2023-04-02 22:29:46,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:29:46,435 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-02 22:29:46,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:29:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-02 22:29:46,436 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-02 22:29:46,439 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 22:29:46,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 22:29:46,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-02 22:29:47,719 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 11) no Hoare annotation was computed. [2023-04-02 22:29:47,720 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 11) no Hoare annotation was computed. [2023-04-02 22:29:47,720 INFO L899 garLoopResultBuilder]: For program point L27(line 27) no Hoare annotation was computed. [2023-04-02 22:29:47,720 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 19 29) no Hoare annotation was computed. [2023-04-02 22:29:47,720 INFO L899 garLoopResultBuilder]: For program point L22(line 22) no Hoare annotation was computed. [2023-04-02 22:29:47,720 INFO L895 garLoopResultBuilder]: At program point L23-2(lines 23 26) the Hoare annotation is: (or (and (<= main_~j~0 190) (<= 190 main_~j~0) (<= 95 main_~i~0) (< main_~i~0 96)) (and (<= 38 main_~i~0) (<= 76 main_~j~0) (<= main_~i~0 38) (<= main_~j~0 76)) (and (<= main_~j~0 88) (<= 88 main_~j~0) (<= 44 main_~i~0) (<= main_~i~0 44)) (and (<= main_~j~0 130) (<= 130 main_~j~0) (<= 65 main_~i~0) (<= main_~i~0 65)) (and (<= main_~i~0 53) (<= 53 main_~i~0) (<= 106 main_~j~0) (<= main_~j~0 106)) (and (<= 86 main_~i~0) (<= main_~i~0 86) (<= 172 main_~j~0) (<= main_~j~0 172)) (and (<= main_~i~0 93) (<= 93 main_~i~0) (<= 186 main_~j~0) (<= main_~j~0 186)) (and (<= main_~j~0 72) (<= 72 main_~j~0) (<= 36 main_~i~0) (<= main_~i~0 36)) (and (<= main_~j~0 12) (<= 12 main_~j~0) (<= main_~i~0 6) (<= 6 main_~i~0)) (and (<= 134 main_~j~0) (<= 67 main_~i~0) (<= main_~i~0 67) (<= main_~j~0 134)) (and (<= 90 main_~i~0) (<= main_~j~0 180) (<= main_~i~0 90) (<= 180 main_~j~0)) (and (<= 148 main_~j~0) (<= main_~j~0 148) (<= 74 main_~i~0) (<= main_~i~0 74)) (and (<= 39 main_~i~0) (<= 78 main_~j~0) (<= main_~i~0 39) (<= main_~j~0 78)) (and (<= 23 main_~i~0) (<= main_~i~0 23) (<= 46 main_~j~0) (<= main_~j~0 46)) (and (<= 22 main_~j~0) (<= 11 main_~i~0) (<= main_~j~0 22) (<= main_~i~0 11)) (and (<= 77 main_~i~0) (<= main_~i~0 77) (<= 154 main_~j~0) (<= main_~j~0 154)) (and (<= 136 main_~j~0) (<= main_~j~0 136) (<= 68 main_~i~0) (<= main_~i~0 68)) (and (<= 97 main_~i~0) (<= main_~j~0 194) (< main_~i~0 98) (<= 194 main_~j~0)) (and (<= 132 main_~j~0) (<= main_~i~0 66) (<= main_~j~0 132) (<= 66 main_~i~0)) (and (<= 100 main_~i~0) (<= main_~j~0 200) (< 199 main_~j~0)) (and (<= 68 main_~j~0) (<= main_~j~0 68) (<= main_~i~0 34) (<= 34 main_~i~0)) (and (<= main_~j~0 92) (<= 46 main_~i~0) (<= main_~i~0 46) (<= 92 main_~j~0)) (and (<= 37 main_~i~0) (<= main_~i~0 37) (<= main_~j~0 74) (<= 74 main_~j~0)) (and (<= 20 main_~i~0) (<= main_~j~0 40) (<= 40 main_~j~0) (<= main_~i~0 20)) (and (<= 98 main_~i~0) (<= 196 main_~j~0) (< main_~i~0 99) (<= main_~j~0 196)) (and (<= main_~j~0 162) (<= main_~i~0 81) (<= 162 main_~j~0) (<= 81 main_~i~0)) (and (<= 52 main_~i~0) (<= main_~i~0 52) (<= main_~j~0 104) (<= 104 main_~j~0)) (and (<= 12 main_~i~0) (<= main_~j~0 24) (<= main_~i~0 12) (<= 24 main_~j~0)) (and (<= 31 main_~i~0) (<= main_~i~0 31) (<= main_~j~0 62) (<= 62 main_~j~0)) (and (<= main_~j~0 56) (<= main_~i~0 28) (<= 28 main_~i~0) (<= 56 main_~j~0)) (and (<= main_~j~0 90) (<= 90 main_~j~0) (<= 45 main_~i~0) (<= main_~i~0 45)) (and (<= main_~i~0 63) (<= main_~j~0 126) (<= 126 main_~j~0) (<= 63 main_~i~0)) (and (<= main_~i~0 79) (<= 158 main_~j~0) (<= main_~j~0 158) (<= 79 main_~i~0)) (and (<= 78 main_~i~0) (<= 156 main_~j~0) (<= main_~i~0 78) (<= main_~j~0 156)) (and (<= main_~j~0 100) (<= 100 main_~j~0) (<= main_~i~0 50) (<= 50 main_~i~0)) (and (<= 96 main_~j~0) (<= 48 main_~i~0) (<= main_~j~0 96) (<= main_~i~0 48)) (and (<= main_~j~0 44) (<= 22 main_~i~0) (<= main_~i~0 22) (<= 44 main_~j~0)) (and (<= main_~i~0 59) (<= 59 main_~i~0) (<= 118 main_~j~0) (<= main_~j~0 118)) (and (<= 150 main_~j~0) (<= main_~j~0 150) (<= main_~i~0 75) (<= 75 main_~i~0)) (and (<= 58 main_~j~0) (<= main_~j~0 58) (<= main_~i~0 29) (<= 29 main_~i~0)) (and (<= main_~i~0 16) (<= main_~j~0 32) (<= 16 main_~i~0) (<= 32 main_~j~0)) (and (<= 89 main_~i~0) (<= 178 main_~j~0) (<= main_~j~0 178) (<= main_~i~0 89)) (and (<= 30 main_~i~0) (<= main_~i~0 30) (<= main_~j~0 60) (<= 60 main_~j~0)) (and (<= 15 main_~i~0) (<= main_~j~0 30) (<= main_~i~0 15) (<= 30 main_~j~0)) (and (<= 33 main_~i~0) (<= main_~j~0 66) (<= 66 main_~j~0) (<= main_~i~0 33)) (and (<= main_~i~0 64) (<= main_~j~0 128) (<= 64 main_~i~0) (<= 128 main_~j~0)) (and (<= main_~j~0 8) (<= main_~i~0 4) (<= 8 main_~j~0) (<= 4 main_~i~0)) (and (<= 9 main_~i~0) (<= 18 main_~j~0) (<= main_~i~0 9) (<= main_~j~0 18)) (and (<= main_~i~0 56) (<= 56 main_~i~0) (<= main_~j~0 112) (<= 112 main_~j~0)) (and (<= main_~j~0 10) (<= 10 main_~j~0) (<= main_~i~0 5) (<= 5 main_~i~0)) (and (<= main_~j~0 144) (<= main_~i~0 72) (<= 72 main_~i~0) (<= 144 main_~j~0)) (and (<= main_~i~0 49) (<= 49 main_~i~0) (<= 98 main_~j~0) (<= main_~j~0 98)) (and (<= main_~j~0 52) (<= 52 main_~j~0) (<= main_~i~0 26) (<= 26 main_~i~0)) (and (<= 2 main_~i~0) (<= 4 main_~j~0) (<= main_~j~0 4) (<= main_~i~0 2)) (and (<= main_~i~0 92) (<= 184 main_~j~0) (<= main_~j~0 184) (<= 92 main_~i~0)) (and (<= main_~i~0 60) (<= 120 main_~j~0) (<= main_~j~0 120) (<= 60 main_~i~0)) (and (<= 138 main_~j~0) (<= main_~j~0 138) (<= 69 main_~i~0) (<= main_~i~0 69)) (and (<= 19 main_~i~0) (<= main_~j~0 38) (<= main_~i~0 19) (<= 38 main_~j~0)) (and (<= 58 main_~i~0) (<= main_~j~0 116) (<= 116 main_~j~0) (<= main_~i~0 58)) (and (<= 80 main_~i~0) (<= main_~i~0 80) (<= 160 main_~j~0) (<= main_~j~0 160)) (and (<= 114 main_~j~0) (<= main_~j~0 114) (<= main_~i~0 57) (<= 57 main_~i~0)) (and (<= 94 main_~i~0) (<= 188 main_~j~0) (<= main_~j~0 188) (<= main_~i~0 94)) (and (<= 108 main_~j~0) (<= main_~i~0 54) (<= main_~j~0 108) (<= 54 main_~i~0)) (and (<= 51 main_~i~0) (<= main_~i~0 51) (<= 102 main_~j~0) (<= main_~j~0 102)) (and (<= 164 main_~j~0) (<= main_~j~0 164) (<= 82 main_~i~0) (<= main_~i~0 82)) (and (<= 70 main_~j~0) (<= 35 main_~i~0) (<= main_~j~0 70) (<= main_~i~0 35)) (and (<= 64 main_~j~0) (<= main_~i~0 32) (<= main_~j~0 64) (<= 32 main_~i~0)) (and (<= 87 main_~i~0) (<= 174 main_~j~0) (<= main_~j~0 174) (<= main_~i~0 87)) (and (<= main_~i~0 76) (<= 152 main_~j~0) (<= main_~j~0 152) (<= 76 main_~i~0)) (and (<= main_~j~0 2) (<= main_~i~0 1) (<= 2 main_~j~0) (<= 1 main_~i~0)) (and (<= 83 main_~i~0) (<= main_~j~0 166) (<= main_~i~0 83) (<= 166 main_~j~0)) (and (<= main_~i~0 10) (<= 20 main_~j~0) (<= 10 main_~i~0) (<= main_~j~0 20)) (and (<= main_~i~0 41) (<= 82 main_~j~0) (<= 41 main_~i~0) (<= main_~j~0 82)) (and (<= main_~j~0 36) (<= main_~i~0 18) (<= 18 main_~i~0) (<= 36 main_~j~0)) (and (<= main_~i~0 27) (<= 54 main_~j~0) (<= main_~j~0 54) (<= 27 main_~i~0)) (and (<= 50 main_~j~0) (<= 25 main_~i~0) (<= main_~j~0 50) (<= main_~i~0 25)) (and (<= 0 main_~j~0) (= main_~i~0 0) (<= main_~j~0 0)) (and (<= main_~j~0 86) (<= 86 main_~j~0) (<= main_~i~0 43) (<= 43 main_~i~0)) (and (<= 62 main_~i~0) (<= 124 main_~j~0) (<= main_~i~0 62) (<= main_~j~0 124)) (and (<= main_~j~0 142) (<= 142 main_~j~0) (<= main_~i~0 71) (<= 71 main_~i~0)) (and (<= 42 main_~i~0) (<= main_~i~0 42) (<= 84 main_~j~0) (<= main_~j~0 84)) (and (<= main_~j~0 192) (< main_~i~0 97) (<= 96 main_~i~0) (<= 192 main_~j~0)) (and (<= 14 main_~j~0) (<= main_~i~0 7) (<= main_~j~0 14) (<= 7 main_~i~0)) (and (<= main_~j~0 6) (<= 6 main_~j~0) (<= 3 main_~i~0) (<= main_~i~0 3)) (and (<= main_~j~0 34) (<= 17 main_~i~0) (<= main_~i~0 17) (<= 34 main_~j~0)) (and (<= 40 main_~i~0) (<= 80 main_~j~0) (<= main_~i~0 40) (<= main_~j~0 80)) (and (<= main_~i~0 14) (<= 14 main_~i~0) (<= main_~j~0 28) (<= 28 main_~j~0)) (and (<= 88 main_~i~0) (<= 176 main_~j~0) (<= main_~j~0 176) (<= main_~i~0 88)) (and (<= main_~i~0 70) (<= 70 main_~i~0) (<= main_~j~0 140) (<= 140 main_~j~0)) (and (<= 182 main_~j~0) (<= main_~i~0 91) (<= 91 main_~i~0) (<= main_~j~0 182)) (and (<= 24 main_~i~0) (<= main_~j~0 48) (<= main_~i~0 24) (<= 48 main_~j~0)) (and (<= main_~j~0 146) (<= 146 main_~j~0) (<= main_~i~0 73) (<= 73 main_~i~0)) (and (<= 8 main_~i~0) (<= main_~i~0 8) (<= main_~j~0 16) (<= 16 main_~j~0)) (and (<= 42 main_~j~0) (<= main_~j~0 42) (<= main_~i~0 21) (<= 21 main_~i~0)) (and (<= main_~j~0 198) (< main_~i~0 100) (<= 99 main_~i~0) (<= 198 main_~j~0)) (and (<= main_~j~0 122) (<= 61 main_~i~0) (<= main_~i~0 61) (<= 122 main_~j~0)) (and (<= main_~i~0 84) (<= 168 main_~j~0) (<= 84 main_~i~0) (<= main_~j~0 168)) (and (<= main_~j~0 110) (<= 110 main_~j~0) (<= main_~i~0 55) (<= 55 main_~i~0)) (and (<= main_~i~0 47) (<= main_~j~0 94) (<= 94 main_~j~0) (<= 47 main_~i~0)) (and (<= 170 main_~j~0) (<= 85 main_~i~0) (<= main_~i~0 85) (<= main_~j~0 170)) (and (<= main_~i~0 13) (<= 13 main_~i~0) (<= main_~j~0 26) (<= 26 main_~j~0))) [2023-04-02 22:29:47,721 INFO L895 garLoopResultBuilder]: At program point L23-3(lines 23 26) the Hoare annotation is: (and (<= main_~j~0 200) (< 199 main_~j~0)) [2023-04-02 22:29:47,721 INFO L899 garLoopResultBuilder]: For program point mainFINAL(lines 19 29) no Hoare annotation was computed. [2023-04-02 22:29:47,721 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 19 29) the Hoare annotation is: true [2023-04-02 22:29:47,721 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 22:29:47,721 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-02 22:29:47,721 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-02 22:29:47,721 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-04-02 22:29:47,721 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-02 22:29:47,721 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 22:29:47,728 INFO L899 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2023-04-02 22:29:47,729 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2023-04-02 22:29:47,729 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 18) no Hoare annotation was computed. [2023-04-02 22:29:47,729 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 18) no Hoare annotation was computed. [2023-04-02 22:29:47,729 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 14 18) the Hoare annotation is: true [2023-04-02 22:29:47,729 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2023-04-02 22:29:47,731 INFO L445 BasicCegarLoop]: Path program histogram: [8, 1] [2023-04-02 22:29:47,733 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 22:29:47,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 10:29:47 BoogieIcfgContainer [2023-04-02 22:29:47,790 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 22:29:47,790 INFO L158 Benchmark]: Toolchain (without parser) took 31657.45ms. Allocated memory was 259.0MB in the beginning and 550.5MB in the end (delta: 291.5MB). Free memory was 220.7MB in the beginning and 384.8MB in the end (delta: -164.1MB). Peak memory consumption was 327.3MB. Max. memory is 8.0GB. [2023-04-02 22:29:47,790 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 189.8MB. Free memory is still 134.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 22:29:47,790 INFO L158 Benchmark]: CACSL2BoogieTranslator took 164.43ms. Allocated memory is still 259.0MB. Free memory was 220.7MB in the beginning and 210.5MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 22:29:47,791 INFO L158 Benchmark]: Boogie Preprocessor took 17.41ms. Allocated memory is still 259.0MB. Free memory was 210.5MB in the beginning and 209.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-02 22:29:47,791 INFO L158 Benchmark]: RCFGBuilder took 310.50ms. Allocated memory is still 259.0MB. Free memory was 209.2MB in the beginning and 197.6MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-02 22:29:47,791 INFO L158 Benchmark]: TraceAbstraction took 31159.72ms. Allocated memory was 259.0MB in the beginning and 550.5MB in the end (delta: 291.5MB). Free memory was 197.0MB in the beginning and 384.8MB in the end (delta: -187.8MB). Peak memory consumption was 303.2MB. Max. memory is 8.0GB. [2023-04-02 22:29:47,792 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 189.8MB. Free memory is still 134.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 164.43ms. Allocated memory is still 259.0MB. Free memory was 220.7MB in the beginning and 210.5MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.41ms. Allocated memory is still 259.0MB. Free memory was 210.5MB in the beginning and 209.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 310.50ms. Allocated memory is still 259.0MB. Free memory was 209.2MB in the beginning and 197.6MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 31159.72ms. Allocated memory was 259.0MB in the beginning and 550.5MB in the end (delta: 291.5MB). Free memory was 197.0MB in the beginning and 384.8MB in the end (delta: -187.8MB). Peak memory consumption was 303.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 31.1s, OverallIterations: 9, TraceHistogramMax: 101, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2 SdHoareTripleChecker+Valid, 3.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 784 SdHoareTripleChecker+Invalid, 2.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 700 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11872 IncrementalHoareTripleChecker+Invalid, 11877 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 84 mSDtfsCounter, 11872 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1462 GetRequests, 818 SyntacticMatches, 94 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8107 ImplicationChecksByTransitivity, 17.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=8, InterpolantAutomatonStates: 499, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 15 PreInvPairs, 117 NumberOfFragments, 1320 HoareAnnotationTreeSize, 15 FomulaSimplifications, 270 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 20.4s InterpolantComputationTime, 831 NumberOfCodeBlocks, 831 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 1162 ConstructedInterpolants, 0 QuantifiedInterpolants, 4316 SizeOfPredicates, 1 NumberOfNonLiveVariables, 1763 ConjunctsInSsa, 397 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 5151/37896 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((j <= 190 && 190 <= j) && 95 <= i) && i < 96) || (((38 <= i && 76 <= j) && i <= 38) && j <= 76)) || (((j <= 88 && 88 <= j) && 44 <= i) && i <= 44)) || (((j <= 130 && 130 <= j) && 65 <= i) && i <= 65)) || (((i <= 53 && 53 <= i) && 106 <= j) && j <= 106)) || (((86 <= i && i <= 86) && 172 <= j) && j <= 172)) || (((i <= 93 && 93 <= i) && 186 <= j) && j <= 186)) || (((j <= 72 && 72 <= j) && 36 <= i) && i <= 36)) || (((j <= 12 && 12 <= j) && i <= 6) && 6 <= i)) || (((134 <= j && 67 <= i) && i <= 67) && j <= 134)) || (((90 <= i && j <= 180) && i <= 90) && 180 <= j)) || (((148 <= j && j <= 148) && 74 <= i) && i <= 74)) || (((39 <= i && 78 <= j) && i <= 39) && j <= 78)) || (((23 <= i && i <= 23) && 46 <= j) && j <= 46)) || (((22 <= j && 11 <= i) && j <= 22) && i <= 11)) || (((77 <= i && i <= 77) && 154 <= j) && j <= 154)) || (((136 <= j && j <= 136) && 68 <= i) && i <= 68)) || (((97 <= i && j <= 194) && i < 98) && 194 <= j)) || (((132 <= j && i <= 66) && j <= 132) && 66 <= i)) || ((100 <= i && j <= 200) && 199 < j)) || (((68 <= j && j <= 68) && i <= 34) && 34 <= i)) || (((j <= 92 && 46 <= i) && i <= 46) && 92 <= j)) || (((37 <= i && i <= 37) && j <= 74) && 74 <= j)) || (((20 <= i && j <= 40) && 40 <= j) && i <= 20)) || (((98 <= i && 196 <= j) && i < 99) && j <= 196)) || (((j <= 162 && i <= 81) && 162 <= j) && 81 <= i)) || (((52 <= i && i <= 52) && j <= 104) && 104 <= j)) || (((12 <= i && j <= 24) && i <= 12) && 24 <= j)) || (((31 <= i && i <= 31) && j <= 62) && 62 <= j)) || (((j <= 56 && i <= 28) && 28 <= i) && 56 <= j)) || (((j <= 90 && 90 <= j) && 45 <= i) && i <= 45)) || (((i <= 63 && j <= 126) && 126 <= j) && 63 <= i)) || (((i <= 79 && 158 <= j) && j <= 158) && 79 <= i)) || (((78 <= i && 156 <= j) && i <= 78) && j <= 156)) || (((j <= 100 && 100 <= j) && i <= 50) && 50 <= i)) || (((96 <= j && 48 <= i) && j <= 96) && i <= 48)) || (((j <= 44 && 22 <= i) && i <= 22) && 44 <= j)) || (((i <= 59 && 59 <= i) && 118 <= j) && j <= 118)) || (((150 <= j && j <= 150) && i <= 75) && 75 <= i)) || (((58 <= j && j <= 58) && i <= 29) && 29 <= i)) || (((i <= 16 && j <= 32) && 16 <= i) && 32 <= j)) || (((89 <= i && 178 <= j) && j <= 178) && i <= 89)) || (((30 <= i && i <= 30) && j <= 60) && 60 <= j)) || (((15 <= i && j <= 30) && i <= 15) && 30 <= j)) || (((33 <= i && j <= 66) && 66 <= j) && i <= 33)) || (((i <= 64 && j <= 128) && 64 <= i) && 128 <= j)) || (((j <= 8 && i <= 4) && 8 <= j) && 4 <= i)) || (((9 <= i && 18 <= j) && i <= 9) && j <= 18)) || (((i <= 56 && 56 <= i) && j <= 112) && 112 <= j)) || (((j <= 10 && 10 <= j) && i <= 5) && 5 <= i)) || (((j <= 144 && i <= 72) && 72 <= i) && 144 <= j)) || (((i <= 49 && 49 <= i) && 98 <= j) && j <= 98)) || (((j <= 52 && 52 <= j) && i <= 26) && 26 <= i)) || (((2 <= i && 4 <= j) && j <= 4) && i <= 2)) || (((i <= 92 && 184 <= j) && j <= 184) && 92 <= i)) || (((i <= 60 && 120 <= j) && j <= 120) && 60 <= i)) || (((138 <= j && j <= 138) && 69 <= i) && i <= 69)) || (((19 <= i && j <= 38) && i <= 19) && 38 <= j)) || (((58 <= i && j <= 116) && 116 <= j) && i <= 58)) || (((80 <= i && i <= 80) && 160 <= j) && j <= 160)) || (((114 <= j && j <= 114) && i <= 57) && 57 <= i)) || (((94 <= i && 188 <= j) && j <= 188) && i <= 94)) || (((108 <= j && i <= 54) && j <= 108) && 54 <= i)) || (((51 <= i && i <= 51) && 102 <= j) && j <= 102)) || (((164 <= j && j <= 164) && 82 <= i) && i <= 82)) || (((70 <= j && 35 <= i) && j <= 70) && i <= 35)) || (((64 <= j && i <= 32) && j <= 64) && 32 <= i)) || (((87 <= i && 174 <= j) && j <= 174) && i <= 87)) || (((i <= 76 && 152 <= j) && j <= 152) && 76 <= i)) || (((j <= 2 && i <= 1) && 2 <= j) && 1 <= i)) || (((83 <= i && j <= 166) && i <= 83) && 166 <= j)) || (((i <= 10 && 20 <= j) && 10 <= i) && j <= 20)) || (((i <= 41 && 82 <= j) && 41 <= i) && j <= 82)) || (((j <= 36 && i <= 18) && 18 <= i) && 36 <= j)) || (((i <= 27 && 54 <= j) && j <= 54) && 27 <= i)) || (((50 <= j && 25 <= i) && j <= 50) && i <= 25)) || ((0 <= j && i == 0) && j <= 0)) || (((j <= 86 && 86 <= j) && i <= 43) && 43 <= i)) || (((62 <= i && 124 <= j) && i <= 62) && j <= 124)) || (((j <= 142 && 142 <= j) && i <= 71) && 71 <= i)) || (((42 <= i && i <= 42) && 84 <= j) && j <= 84)) || (((j <= 192 && i < 97) && 96 <= i) && 192 <= j)) || (((14 <= j && i <= 7) && j <= 14) && 7 <= i)) || (((j <= 6 && 6 <= j) && 3 <= i) && i <= 3)) || (((j <= 34 && 17 <= i) && i <= 17) && 34 <= j)) || (((40 <= i && 80 <= j) && i <= 40) && j <= 80)) || (((i <= 14 && 14 <= i) && j <= 28) && 28 <= j)) || (((88 <= i && 176 <= j) && j <= 176) && i <= 88)) || (((i <= 70 && 70 <= i) && j <= 140) && 140 <= j)) || (((182 <= j && i <= 91) && 91 <= i) && j <= 182)) || (((24 <= i && j <= 48) && i <= 24) && 48 <= j)) || (((j <= 146 && 146 <= j) && i <= 73) && 73 <= i)) || (((8 <= i && i <= 8) && j <= 16) && 16 <= j)) || (((42 <= j && j <= 42) && i <= 21) && 21 <= i)) || (((j <= 198 && i < 100) && 99 <= i) && 198 <= j)) || (((j <= 122 && 61 <= i) && i <= 61) && 122 <= j)) || (((i <= 84 && 168 <= j) && 84 <= i) && j <= 168)) || (((j <= 110 && 110 <= j) && i <= 55) && 55 <= i)) || (((i <= 47 && j <= 94) && 94 <= j) && 47 <= i)) || (((170 <= j && 85 <= i) && i <= 85) && j <= 170)) || (((i <= 13 && 13 <= i) && j <= 26) && 26 <= j) RESULT: Ultimate proved your program to be correct! [2023-04-02 22:29:47,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...