/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-multidimensional/rev-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 15:03:26,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 15:03:26,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 15:03:26,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 15:03:26,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 15:03:26,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 15:03:26,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 15:03:26,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 15:03:26,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 15:03:26,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 15:03:26,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 15:03:26,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 15:03:26,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 15:03:26,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 15:03:26,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 15:03:26,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 15:03:26,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 15:03:26,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 15:03:26,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 15:03:26,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 15:03:26,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 15:03:26,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 15:03:26,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 15:03:26,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 15:03:26,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 15:03:26,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 15:03:26,608 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 15:03:26,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 15:03:26,611 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 15:03:26,611 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 15:03:26,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 15:03:26,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 15:03:26,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 15:03:26,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 15:03:26,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 15:03:26,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 15:03:26,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 15:03:26,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 15:03:26,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 15:03:26,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 15:03:26,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 15:03:26,619 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 15:03:26,653 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 15:03:26,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 15:03:26,653 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 15:03:26,654 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 15:03:26,654 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 15:03:26,654 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 15:03:26,655 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 15:03:26,655 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 15:03:26,655 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 15:03:26,655 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 15:03:26,656 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 15:03:26,656 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 15:03:26,656 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 15:03:26,656 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 15:03:26,656 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 15:03:26,656 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 15:03:26,657 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 15:03:26,657 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 15:03:26,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 15:03:26,657 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 15:03:26,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 15:03:26,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 15:03:26,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 15:03:26,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 15:03:26,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 15:03:26,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 15:03:26,658 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 15:03:26,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 15:03:26,658 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 15:03:26,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 15:03:26,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 15:03:26,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 15:03:26,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:03:26,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 15:03:26,659 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 15:03:26,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 15:03:26,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 15:03:26,660 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 15:03:26,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 15:03:26,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 15:03:26,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 15:03:26,660 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 15:03:26,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 15:03:26,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 15:03:26,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 15:03:26,929 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 15:03:26,930 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 15:03:26,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/rev-3-u.c [2023-04-02 15:03:28,084 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 15:03:28,277 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 15:03:28,277 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/rev-3-u.c [2023-04-02 15:03:28,285 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/655259cfd/ec935803dd2e430385b5136cf88dbdf4/FLAG4532f22bf [2023-04-02 15:03:28,298 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/655259cfd/ec935803dd2e430385b5136cf88dbdf4 [2023-04-02 15:03:28,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 15:03:28,301 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 15:03:28,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 15:03:28,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 15:03:28,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 15:03:28,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:03:28" (1/1) ... [2023-04-02 15:03:28,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c6a2511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:03:28, skipping insertion in model container [2023-04-02 15:03:28,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:03:28" (1/1) ... [2023-04-02 15:03:28,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 15:03:28,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 15:03:28,486 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/rev-3-u.c[319,332] [2023-04-02 15:03:28,513 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:03:28,524 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 15:03:28,534 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/rev-3-u.c[319,332] [2023-04-02 15:03:28,556 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:03:28,568 INFO L208 MainTranslator]: Completed translation [2023-04-02 15:03:28,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:03:28 WrapperNode [2023-04-02 15:03:28,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 15:03:28,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 15:03:28,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 15:03:28,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 15:03:28,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:03:28" (1/1) ... [2023-04-02 15:03:28,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:03:28" (1/1) ... [2023-04-02 15:03:28,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:03:28" (1/1) ... [2023-04-02 15:03:28,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:03:28" (1/1) ... [2023-04-02 15:03:28,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:03:28" (1/1) ... [2023-04-02 15:03:28,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:03:28" (1/1) ... [2023-04-02 15:03:28,617 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:03:28" (1/1) ... [2023-04-02 15:03:28,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:03:28" (1/1) ... [2023-04-02 15:03:28,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 15:03:28,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 15:03:28,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 15:03:28,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 15:03:28,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:03:28" (1/1) ... [2023-04-02 15:03:28,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:03:28,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:03:28,670 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 15:03:28,690 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 15:03:28,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 15:03:28,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 15:03:28,708 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 15:03:28,709 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 15:03:28,710 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 15:03:28,710 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 15:03:28,710 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 15:03:28,710 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 15:03:28,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 15:03:28,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 15:03:28,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 15:03:28,711 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 15:03:28,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 15:03:28,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 15:03:28,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 15:03:28,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 15:03:28,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 15:03:28,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 15:03:28,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 15:03:28,777 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 15:03:28,779 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 15:03:28,991 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 15:03:29,028 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 15:03:29,028 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-04-02 15:03:29,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:03:29 BoogieIcfgContainer [2023-04-02 15:03:29,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 15:03:29,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 15:03:29,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 15:03:29,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 15:03:29,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 03:03:28" (1/3) ... [2023-04-02 15:03:29,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64bc7e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:03:29, skipping insertion in model container [2023-04-02 15:03:29,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:03:28" (2/3) ... [2023-04-02 15:03:29,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64bc7e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:03:29, skipping insertion in model container [2023-04-02 15:03:29,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:03:29" (3/3) ... [2023-04-02 15:03:29,049 INFO L112 eAbstractionObserver]: Analyzing ICFG rev-3-u.c [2023-04-02 15:03:29,072 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 15:03:29,072 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 15:03:29,145 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 15:03:29,152 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;@71e0f9c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 15:03:29,152 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 15:03:29,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 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 15:03:29,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 15:03:29,162 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:03:29,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:03:29,163 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:03:29,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:03:29,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1112037785, now seen corresponding path program 1 times [2023-04-02 15:03:29,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:03:29,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057331262] [2023-04-02 15:03:29,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:03:29,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:03:29,302 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:03:29,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346186495] [2023-04-02 15:03:29,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:03:29,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:03:29,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:03:29,309 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 15:03:29,329 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 15:03:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:03:29,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 15:03:29,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:03:29,483 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 15:03:29,484 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:03:29,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:03:29,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057331262] [2023-04-02 15:03:29,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:03:29,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346186495] [2023-04-02 15:03:29,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346186495] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:03:29,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:03:29,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 15:03:29,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258225578] [2023-04-02 15:03:29,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:03:29,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 15:03:29,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:03:29,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 15:03:29,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:03:29,531 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 15:03:29,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:03:29,631 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2023-04-02 15:03:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 15:03:29,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-02 15:03:29,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:03:29,639 INFO L225 Difference]: With dead ends: 45 [2023-04-02 15:03:29,640 INFO L226 Difference]: Without dead ends: 25 [2023-04-02 15:03:29,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 15:03:29,649 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:03:29,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:03:29,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-02 15:03:29,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-04-02 15:03:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:03:29,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2023-04-02 15:03:29,685 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 14 [2023-04-02 15:03:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:03:29,685 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2023-04-02 15:03:29,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 15:03:29,686 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2023-04-02 15:03:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 15:03:29,687 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:03:29,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:03:29,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 15:03:29,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 15:03:29,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:03:29,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:03:29,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1793716141, now seen corresponding path program 1 times [2023-04-02 15:03:29,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:03:29,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583343259] [2023-04-02 15:03:29,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:03:29,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:03:29,925 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:03:29,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454732180] [2023-04-02 15:03:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:03:29,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:03:29,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:03:29,932 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 15:03:29,940 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 15:03:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:03:30,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 15:03:30,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:03:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:03:30,056 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:03:30,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:03:30,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583343259] [2023-04-02 15:03:30,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:03:30,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454732180] [2023-04-02 15:03:30,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454732180] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:03:30,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:03:30,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 15:03:30,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545997659] [2023-04-02 15:03:30,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:03:30,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 15:03:30,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:03:30,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 15:03:30,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 15:03:30,059 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 15:03:30,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:03:30,150 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2023-04-02 15:03:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 15:03:30,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-02 15:03:30,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:03:30,153 INFO L225 Difference]: With dead ends: 50 [2023-04-02 15:03:30,153 INFO L226 Difference]: Without dead ends: 33 [2023-04-02 15:03:30,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 15:03:30,156 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:03:30,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 31 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:03:30,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-02 15:03:30,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2023-04-02 15:03:30,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:03:30,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2023-04-02 15:03:30,170 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 16 [2023-04-02 15:03:30,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:03:30,171 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2023-04-02 15:03:30,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 15:03:30,171 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2023-04-02 15:03:30,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 15:03:30,173 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:03:30,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:03:30,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 15:03:30,378 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,SelfDestructingSolverStorable1 [2023-04-02 15:03:30,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:03:30,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:03:30,379 INFO L85 PathProgramCache]: Analyzing trace with hash -335240394, now seen corresponding path program 1 times [2023-04-02 15:03:30,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:03:30,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445074779] [2023-04-02 15:03:30,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:03:30,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:03:30,406 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:03:30,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137137431] [2023-04-02 15:03:30,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:03:30,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:03:30,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:03:30,410 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 15:03:30,434 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 15:03:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:03:30,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 15:03:30,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:03:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:03:30,498 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:03:30,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:03:30,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445074779] [2023-04-02 15:03:30,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:03:30,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137137431] [2023-04-02 15:03:30,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137137431] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:03:30,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:03:30,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 15:03:30,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292468850] [2023-04-02 15:03:30,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:03:30,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 15:03:30,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:03:30,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 15:03:30,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 15:03:30,501 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 15:03:30,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:03:30,548 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2023-04-02 15:03:30,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 15:03:30,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 18 [2023-04-02 15:03:30,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:03:30,550 INFO L225 Difference]: With dead ends: 53 [2023-04-02 15:03:30,550 INFO L226 Difference]: Without dead ends: 33 [2023-04-02 15:03:30,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 15:03:30,551 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:03:30,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 29 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:03:30,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-02 15:03:30,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2023-04-02 15:03:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:03:30,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2023-04-02 15:03:30,558 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 18 [2023-04-02 15:03:30,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:03:30,558 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2023-04-02 15:03:30,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 15:03:30,559 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2023-04-02 15:03:30,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 15:03:30,559 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:03:30,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:03:30,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 15:03:30,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:03:30,765 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:03:30,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:03:30,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1363959647, now seen corresponding path program 1 times [2023-04-02 15:03:30,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:03:30,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414786130] [2023-04-02 15:03:30,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:03:30,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:03:30,778 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:03:30,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380097489] [2023-04-02 15:03:30,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:03:30,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:03:30,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:03:30,783 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 15:03:30,795 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 15:03:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:03:30,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 15:03:30,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:03:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:03:30,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:03:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:03:30,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:03:30,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414786130] [2023-04-02 15:03:30,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:03:30,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380097489] [2023-04-02 15:03:30,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380097489] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:03:30,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1491779085] [2023-04-02 15:03:30,931 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 15:03:30,931 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:03:30,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:03:30,938 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:03:30,938 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:03:31,025 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 15:03:31,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:03:31,669 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:03:31,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1491779085] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:03:31,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:03:31,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 5] total 16 [2023-04-02 15:03:31,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858992506] [2023-04-02 15:03:31,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:03:31,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 15:03:31,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:03:31,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 15:03:31,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-04-02 15:03:31,881 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 10 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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 15:03:32,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:03:32,752 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2023-04-02 15:03:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 15:03:32,753 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-02 15:03:32,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:03:32,755 INFO L225 Difference]: With dead ends: 62 [2023-04-02 15:03:32,755 INFO L226 Difference]: Without dead ends: 47 [2023-04-02 15:03:32,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2023-04-02 15:03:32,761 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 111 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 15:03:32,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 7 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 15:03:32,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-02 15:03:32,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2023-04-02 15:03:32,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:03:32,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-04-02 15:03:32,786 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 19 [2023-04-02 15:03:32,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:03:32,786 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-04-02 15:03:32,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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 15:03:32,787 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-04-02 15:03:32,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 15:03:32,788 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:03:32,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:03:32,796 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 15:03:32,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:03:32,995 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:03:32,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:03:32,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1411883054, now seen corresponding path program 1 times [2023-04-02 15:03:32,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:03:32,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136602689] [2023-04-02 15:03:32,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:03:32,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:03:33,010 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:03:33,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191007245] [2023-04-02 15:03:33,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:03:33,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:03:33,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:03:33,012 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 15:03:33,022 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 15:03:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:03:33,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 15:03:33,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:03:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 15:03:33,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:03:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 15:03:33,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:03:33,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136602689] [2023-04-02 15:03:33,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:03:33,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191007245] [2023-04-02 15:03:33,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191007245] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:03:33,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [688801528] [2023-04-02 15:03:33,143 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 15:03:33,143 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:03:33,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:03:33,144 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:03:33,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:03:33,169 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 15:03:33,654 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-02 15:03:33,673 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:03:33,677 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:03:38,173 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1021#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~n~0_BEFORE_CALL_1 Int) (v_main_~k~0_103 Int) (|v_main_~#A~0.base_BEFORE_CALL_1| Int) (v_main_~j~0_103 Int) (|v_main_~#B~0.offset_BEFORE_CALL_1| Int) (|v_main_~#A~0.offset_BEFORE_CALL_1| Int) (|v_main_~#B~0.base_BEFORE_CALL_1| Int) (v_main_~i~0_84 Int)) (and (< 0 v_main_~n~0_BEFORE_CALL_1) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) |v_main_~#A~0.offset_BEFORE_CALL_1|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_1|) (+ (* 4 v_main_~n~0_BEFORE_CALL_1) (- 4) |v_main_~#B~0.offset_BEFORE_CALL_1| (* (* (* 4 v_main_~n~0_BEFORE_CALL_1) v_main_~n~0_BEFORE_CALL_1) (+ (- 1) v_main_~n~0_BEFORE_CALL_1)) (* (* 4 v_main_~n~0_BEFORE_CALL_1) (+ (- 1) v_main_~n~0_BEFORE_CALL_1)))))) (<= v_main_~n~0_BEFORE_CALL_1 v_main_~i~0_84) (or (and (<= v_main_~j~0_103 v_main_~k~0_103) (<= 0 v_main_~k~0_103) (<= v_main_~n~0_BEFORE_CALL_1 v_main_~j~0_103) (<= v_main_~i~0_84 v_main_~n~0_BEFORE_CALL_1)) (and (= v_main_~j~0_103 0) (= v_main_~k~0_103 0) (= v_main_~i~0_84 0))))))' at error location [2023-04-02 15:03:38,174 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:03:38,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:03:38,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 15:03:38,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259550131] [2023-04-02 15:03:38,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:03:38,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 15:03:38,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:03:38,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 15:03:38,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=473, Unknown=2, NotChecked=0, Total=552 [2023-04-02 15:03:38,176 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 15:03:38,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:03:38,305 INFO L93 Difference]: Finished difference Result 70 states and 98 transitions. [2023-04-02 15:03:38,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 15:03:38,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 24 [2023-04-02 15:03:38,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:03:38,306 INFO L225 Difference]: With dead ends: 70 [2023-04-02 15:03:38,306 INFO L226 Difference]: Without dead ends: 46 [2023-04-02 15:03:38,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=93, Invalid=555, Unknown=2, NotChecked=0, Total=650 [2023-04-02 15:03:38,307 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:03:38,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 38 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:03:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-02 15:03:38,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2023-04-02 15:03:38,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 15:03:38,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2023-04-02 15:03:38,321 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 24 [2023-04-02 15:03:38,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:03:38,321 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2023-04-02 15:03:38,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 15:03:38,321 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2023-04-02 15:03:38,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-02 15:03:38,322 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:03:38,322 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:03:38,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 15:03:38,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:03:38,528 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:03:38,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:03:38,528 INFO L85 PathProgramCache]: Analyzing trace with hash -716676259, now seen corresponding path program 2 times [2023-04-02 15:03:38,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:03:38,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795205063] [2023-04-02 15:03:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:03:38,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:03:38,551 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:03:38,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664328101] [2023-04-02 15:03:38,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:03:38,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:03:38,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:03:38,553 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 15:03:38,572 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 15:03:38,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 15:03:38,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:03:38,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 15:03:38,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:03:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-02 15:03:38,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:03:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-02 15:03:38,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:03:38,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795205063] [2023-04-02 15:03:38,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:03:38,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664328101] [2023-04-02 15:03:38,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664328101] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:03:38,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1516158131] [2023-04-02 15:03:38,706 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 15:03:38,706 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:03:38,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:03:38,707 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:03:38,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:03:38,723 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 15:03:39,166 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-02 15:03:39,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:03:39,200 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:03:43,690 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1430#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~n~0_BEFORE_CALL_2 Int) (v_main_~i~0_111 Int) (v_main_~k~0_158 Int) (v_main_~j~0_142 Int) (|v_main_~#B~0.offset_BEFORE_CALL_2| Int) (|v_main_~#B~0.base_BEFORE_CALL_2| Int) (|v_main_~#A~0.offset_BEFORE_CALL_2| Int) (|v_main_~#A~0.base_BEFORE_CALL_2| Int)) (and (or (and (= v_main_~j~0_142 0) (= v_main_~k~0_158 0) (= v_main_~i~0_111 0)) (and (<= 0 v_main_~k~0_158) (<= v_main_~i~0_111 v_main_~n~0_BEFORE_CALL_2) (<= v_main_~n~0_BEFORE_CALL_2 v_main_~j~0_142) (<= v_main_~j~0_142 v_main_~k~0_158))) (<= v_main_~n~0_BEFORE_CALL_2 v_main_~i~0_111) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_2|) (+ (* (+ (- 1) v_main_~n~0_BEFORE_CALL_2) (* 4 v_main_~n~0_BEFORE_CALL_2)) (- 4) |v_main_~#B~0.offset_BEFORE_CALL_2| (* (* (* 4 v_main_~n~0_BEFORE_CALL_2) v_main_~n~0_BEFORE_CALL_2) (+ (- 1) v_main_~n~0_BEFORE_CALL_2)) (* 4 v_main_~n~0_BEFORE_CALL_2))) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) |v_main_~#A~0.offset_BEFORE_CALL_2|))) (< 0 v_main_~n~0_BEFORE_CALL_2))))' at error location [2023-04-02 15:03:43,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:03:43,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:03:43,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 15:03:43,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288055673] [2023-04-02 15:03:43,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:03:43,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 15:03:43,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:03:43,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 15:03:43,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=471, Unknown=2, NotChecked=0, Total=552 [2023-04-02 15:03:43,692 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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 15:03:43,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:03:43,860 INFO L93 Difference]: Finished difference Result 173 states and 228 transitions. [2023-04-02 15:03:43,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 15:03:43,861 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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 30 [2023-04-02 15:03:43,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:03:43,862 INFO L225 Difference]: With dead ends: 173 [2023-04-02 15:03:43,862 INFO L226 Difference]: Without dead ends: 142 [2023-04-02 15:03:43,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=95, Invalid=553, Unknown=2, NotChecked=0, Total=650 [2023-04-02 15:03:43,863 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 95 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:03:43,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 42 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:03:43,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-04-02 15:03:43,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 93. [2023-04-02 15:03:43,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 84 states have (on average 1.25) internal successors, (105), 84 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 15:03:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2023-04-02 15:03:43,892 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 30 [2023-04-02 15:03:43,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:03:43,892 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2023-04-02 15:03:43,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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 15:03:43,892 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2023-04-02 15:03:43,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-02 15:03:43,894 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:03:43,894 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:03:43,910 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 15:03:44,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:03:44,108 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:03:44,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:03:44,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1473006761, now seen corresponding path program 3 times [2023-04-02 15:03:44,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:03:44,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021581661] [2023-04-02 15:03:44,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:03:44,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:03:44,144 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:03:44,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009888773] [2023-04-02 15:03:44,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:03:44,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:03:44,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:03:44,148 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 15:03:44,149 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 15:03:44,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 15:03:44,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:03:44,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 15:03:44,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:03:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 52 proven. 88 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2023-04-02 15:03:44,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:03:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 52 proven. 88 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2023-04-02 15:03:44,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:03:44,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021581661] [2023-04-02 15:03:44,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:03:44,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009888773] [2023-04-02 15:03:44,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009888773] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:03:44,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [948711100] [2023-04-02 15:03:44,402 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 15:03:44,402 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:03:44,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:03:44,403 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:03:44,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:03:44,420 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 15:03:44,783 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-02 15:03:44,799 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:03:44,802 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:03:49,238 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2415#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~n~0_BEFORE_CALL_3 Int) (v_main_~k~0_245 Int) (|v_main_~#B~0.base_BEFORE_CALL_3| Int) (v_main_~i~0_141 Int) (|v_main_~#A~0.base_BEFORE_CALL_3| Int) (|v_main_~#B~0.offset_BEFORE_CALL_3| Int) (|v_main_~#A~0.offset_BEFORE_CALL_3| Int) (v_main_~j~0_191 Int)) (and (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) |v_main_~#A~0.offset_BEFORE_CALL_3|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_3|) (+ (- 4) |v_main_~#B~0.offset_BEFORE_CALL_3| (* 4 v_main_~n~0_BEFORE_CALL_3) (* (* (* 4 v_main_~n~0_BEFORE_CALL_3) v_main_~n~0_BEFORE_CALL_3) (+ (- 1) v_main_~n~0_BEFORE_CALL_3)) (* (* 4 v_main_~n~0_BEFORE_CALL_3) (+ (- 1) v_main_~n~0_BEFORE_CALL_3)))))) (or (and (<= 0 v_main_~k~0_245) (<= v_main_~n~0_BEFORE_CALL_3 v_main_~j~0_191) (<= v_main_~i~0_141 v_main_~n~0_BEFORE_CALL_3) (<= v_main_~j~0_191 v_main_~k~0_245)) (and (= v_main_~i~0_141 0) (= v_main_~k~0_245 0) (= v_main_~j~0_191 0))) (<= v_main_~n~0_BEFORE_CALL_3 v_main_~i~0_141) (< 0 v_main_~n~0_BEFORE_CALL_3))))' at error location [2023-04-02 15:03:49,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:03:49,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:03:49,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-02 15:03:49,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077784023] [2023-04-02 15:03:49,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:03:49,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 15:03:49,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:03:49,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 15:03:49,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=469, Unknown=2, NotChecked=0, Total=552 [2023-04-02 15:03:49,240 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 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 15:03:49,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:03:49,474 INFO L93 Difference]: Finished difference Result 324 states and 406 transitions. [2023-04-02 15:03:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 15:03:49,475 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 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 78 [2023-04-02 15:03:49,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:03:49,477 INFO L225 Difference]: With dead ends: 324 [2023-04-02 15:03:49,477 INFO L226 Difference]: Without dead ends: 215 [2023-04-02 15:03:49,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 208 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=114, Invalid=640, Unknown=2, NotChecked=0, Total=756 [2023-04-02 15:03:49,481 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:03:49,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 54 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:03:49,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-04-02 15:03:49,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 160. [2023-04-02 15:03:49,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 146 states have (on average 1.2191780821917808) internal successors, (178), 147 states have internal predecessors, (178), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 15:03:49,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 198 transitions. [2023-04-02 15:03:49,525 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 198 transitions. Word has length 78 [2023-04-02 15:03:49,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:03:49,525 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 198 transitions. [2023-04-02 15:03:49,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 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 15:03:49,525 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 198 transitions. [2023-04-02 15:03:49,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-02 15:03:49,526 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:03:49,527 INFO L195 NwaCegarLoop]: trace histogram [32, 28, 8, 8, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:03:49,532 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 15:03:49,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:03:49,727 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:03:49,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:03:49,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1718595317, now seen corresponding path program 4 times [2023-04-02 15:03:49,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:03:49,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915594950] [2023-04-02 15:03:49,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:03:49,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:03:49,768 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:03:49,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555655316] [2023-04-02 15:03:49,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 15:03:49,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:03:49,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:03:49,770 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:03:49,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 15:03:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:03:49,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 15:03:49,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:03:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 190 proven. 10 refuted. 0 times theorem prover too weak. 1316 trivial. 0 not checked. [2023-04-02 15:03:50,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:03:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 190 proven. 10 refuted. 0 times theorem prover too weak. 1316 trivial. 0 not checked. [2023-04-02 15:03:50,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:03:50,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915594950] [2023-04-02 15:03:50,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:03:50,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555655316] [2023-04-02 15:03:50,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555655316] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:03:50,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [204667529] [2023-04-02 15:03:50,092 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 15:03:50,092 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:03:50,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:03:50,093 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:03:50,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:03:50,107 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 15:03:50,454 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-02 15:03:50,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:03:50,474 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:03:54,889 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4095#(and (exists ((v_main_~n~0_BEFORE_CALL_4 Int) (|v_main_~#B~0.base_BEFORE_CALL_4| Int) (v_main_~j~0_246 Int) (|v_main_~#A~0.base_BEFORE_CALL_4| Int) (v_main_~i~0_172 Int) (|v_main_~#B~0.offset_BEFORE_CALL_4| Int) (v_main_~k~0_370 Int) (|v_main_~#A~0.offset_BEFORE_CALL_4| Int)) (and (< 0 v_main_~n~0_BEFORE_CALL_4) (or (and (= v_main_~j~0_246 0) (= v_main_~k~0_370 0) (= v_main_~i~0_172 0)) (and (<= v_main_~j~0_246 v_main_~k~0_370) (<= v_main_~i~0_172 v_main_~n~0_BEFORE_CALL_4) (<= v_main_~n~0_BEFORE_CALL_4 v_main_~j~0_246) (<= 0 v_main_~k~0_370))) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) |v_main_~#A~0.offset_BEFORE_CALL_4|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_4|) (+ (* 4 v_main_~n~0_BEFORE_CALL_4) (- 4) |v_main_~#B~0.offset_BEFORE_CALL_4| (* (* 4 v_main_~n~0_BEFORE_CALL_4) (+ (- 1) v_main_~n~0_BEFORE_CALL_4)) (* (* (* 4 v_main_~n~0_BEFORE_CALL_4) v_main_~n~0_BEFORE_CALL_4) (+ (- 1) v_main_~n~0_BEFORE_CALL_4)))))) (<= v_main_~n~0_BEFORE_CALL_4 v_main_~i~0_172))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:03:54,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:03:54,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:03:54,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-02 15:03:54,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911166975] [2023-04-02 15:03:54,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:03:54,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 15:03:54,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:03:54,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 15:03:54,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=677, Unknown=2, NotChecked=0, Total=812 [2023-04-02 15:03:54,891 INFO L87 Difference]: Start difference. First operand 160 states and 198 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 15:03:55,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:03:55,148 INFO L93 Difference]: Finished difference Result 442 states and 637 transitions. [2023-04-02 15:03:55,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 15:03:55,148 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2023-04-02 15:03:55,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:03:55,150 INFO L225 Difference]: With dead ends: 442 [2023-04-02 15:03:55,150 INFO L226 Difference]: Without dead ends: 294 [2023-04-02 15:03:55,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=203, Invalid=917, Unknown=2, NotChecked=0, Total=1122 [2023-04-02 15:03:55,152 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 107 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:03:55,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 38 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:03:55,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-04-02 15:03:55,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 292. [2023-04-02 15:03:55,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 266 states have (on average 1.1203007518796992) internal successors, (298), 267 states have internal predecessors, (298), 23 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-04-02 15:03:55,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 342 transitions. [2023-04-02 15:03:55,218 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 342 transitions. Word has length 120 [2023-04-02 15:03:55,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:03:55,218 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 342 transitions. [2023-04-02 15:03:55,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 15:03:55,218 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 342 transitions. [2023-04-02 15:03:55,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-04-02 15:03:55,220 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:03:55,220 INFO L195 NwaCegarLoop]: trace histogram [80, 70, 8, 8, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:03:55,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-02 15:03:55,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-02 15:03:55,425 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:03:55,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:03:55,425 INFO L85 PathProgramCache]: Analyzing trace with hash -815982539, now seen corresponding path program 5 times [2023-04-02 15:03:55,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:03:55,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107819817] [2023-04-02 15:03:55,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:03:55,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:03:55,485 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:03:55,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235914729] [2023-04-02 15:03:55,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:03:55,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:03:55,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:03:55,487 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:03:55,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process