/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-patterns/array17_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 15:06:53,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 15:06:53,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 15:06:53,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 15:06:53,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 15:06:53,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 15:06:53,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 15:06:53,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 15:06:53,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 15:06:53,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 15:06:53,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 15:06:53,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 15:06:53,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 15:06:53,665 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 15:06:53,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 15:06:53,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 15:06:53,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 15:06:53,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 15:06:53,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 15:06:53,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 15:06:53,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 15:06:53,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 15:06:53,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 15:06:53,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 15:06:53,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 15:06:53,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 15:06:53,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 15:06:53,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 15:06:53,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 15:06:53,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 15:06:53,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 15:06:53,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 15:06:53,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 15:06:53,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 15:06:53,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 15:06:53,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 15:06:53,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 15:06:53,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 15:06:53,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 15:06:53,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 15:06:53,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 15:06:53,685 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 15:06:53,707 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 15:06:53,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 15:06:53,707 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 15:06:53,707 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 15:06:53,708 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 15:06:53,708 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 15:06:53,708 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 15:06:53,708 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 15:06:53,708 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 15:06:53,709 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 15:06:53,709 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 15:06:53,709 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 15:06:53,709 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 15:06:53,709 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 15:06:53,709 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 15:06:53,709 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 15:06:53,709 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 15:06:53,709 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 15:06:53,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 15:06:53,710 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 15:06:53,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 15:06:53,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 15:06:53,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 15:06:53,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 15:06:53,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 15:06:53,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 15:06:53,711 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 15:06:53,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 15:06:53,711 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 15:06:53,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 15:06:53,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 15:06:53,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 15:06:53,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:06:53,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 15:06:53,712 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 15:06:53,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 15:06:53,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 15:06:53,712 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 15:06:53,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 15:06:53,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 15:06:53,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 15:06:53,712 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 15:06:53,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 15:06:53,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 15:06:53,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 15:06:53,950 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 15:06:53,950 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 15:06:53,951 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array17_pattern.c [2023-04-02 15:06:55,120 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 15:06:55,277 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 15:06:55,277 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array17_pattern.c [2023-04-02 15:06:55,282 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5d8429b5/7e48abe0932248669cea2b49acb6bf31/FLAG34726d0ae [2023-04-02 15:06:55,294 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5d8429b5/7e48abe0932248669cea2b49acb6bf31 [2023-04-02 15:06:55,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 15:06:55,297 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 15:06:55,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 15:06:55,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 15:06:55,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 15:06:55,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:06:55" (1/1) ... [2023-04-02 15:06:55,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@563009ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:06:55, skipping insertion in model container [2023-04-02 15:06:55,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:06:55" (1/1) ... [2023-04-02 15:06:55,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 15:06:55,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 15:06:55,431 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-patterns/array17_pattern.c[1441,1454] [2023-04-02 15:06:55,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:06:55,458 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 15:06:55,467 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array17_pattern.c[1441,1454] [2023-04-02 15:06:55,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:06:55,485 INFO L208 MainTranslator]: Completed translation [2023-04-02 15:06:55,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:06:55 WrapperNode [2023-04-02 15:06:55,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 15:06:55,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 15:06:55,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 15:06:55,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 15:06:55,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:06:55" (1/1) ... [2023-04-02 15:06:55,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:06:55" (1/1) ... [2023-04-02 15:06:55,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:06:55" (1/1) ... [2023-04-02 15:06:55,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:06:55" (1/1) ... [2023-04-02 15:06:55,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:06:55" (1/1) ... [2023-04-02 15:06:55,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:06:55" (1/1) ... [2023-04-02 15:06:55,510 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:06:55" (1/1) ... [2023-04-02 15:06:55,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:06:55" (1/1) ... [2023-04-02 15:06:55,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 15:06:55,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 15:06:55,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 15:06:55,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 15:06:55,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:06:55" (1/1) ... [2023-04-02 15:06:55,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:06:55,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:06:55,545 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 15:06:55,554 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 15:06:55,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 15:06:55,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 15:06:55,578 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 15:06:55,578 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 15:06:55,578 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 15:06:55,578 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 15:06:55,578 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 15:06:55,578 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 15:06:55,578 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 15:06:55,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 15:06:55,579 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 15:06:55,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 15:06:55,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 15:06:55,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-04-02 15:06:55,579 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 15:06:55,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 15:06:55,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 15:06:55,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 15:06:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 15:06:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 15:06:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 15:06:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 15:06:55,641 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 15:06:55,643 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 15:06:55,811 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 15:06:55,911 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 15:06:55,911 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-02 15:06:55,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:06:55 BoogieIcfgContainer [2023-04-02 15:06:55,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 15:06:55,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 15:06:55,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 15:06:55,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 15:06:55,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 03:06:55" (1/3) ... [2023-04-02 15:06:55,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa2f6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:06:55, skipping insertion in model container [2023-04-02 15:06:55,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:06:55" (2/3) ... [2023-04-02 15:06:55,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa2f6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:06:55, skipping insertion in model container [2023-04-02 15:06:55,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:06:55" (3/3) ... [2023-04-02 15:06:55,920 INFO L112 eAbstractionObserver]: Analyzing ICFG array17_pattern.c [2023-04-02 15:06:55,933 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 15:06:55,934 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 15:06:55,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 15:06:55,980 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;@15a9b6a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 15:06:55,981 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 15:06:55,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:06:55,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 15:06:55,990 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:06:55,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:06:55,990 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:06:55,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:06:55,995 INFO L85 PathProgramCache]: Analyzing trace with hash -551539435, now seen corresponding path program 1 times [2023-04-02 15:06:56,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:06:56,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277456704] [2023-04-02 15:06:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:06:56,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:06:56,091 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:06:56,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089014187] [2023-04-02 15:06:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:06:56,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:06:56,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:06:56,099 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 15:06:56,100 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 15:06:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:06:56,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 15:06:56,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:06:56,245 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 15:06:56,246 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:06:56,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:06:56,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277456704] [2023-04-02 15:06:56,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:06:56,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089014187] [2023-04-02 15:06:56,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089014187] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:06:56,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:06:56,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 15:06:56,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363407337] [2023-04-02 15:06:56,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:06:56,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 15:06:56,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:06:56,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 15:06:56,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 15:06:56,274 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:06:56,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:06:56,303 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2023-04-02 15:06:56,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 15:06:56,307 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-04-02 15:06:56,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:06:56,314 INFO L225 Difference]: With dead ends: 44 [2023-04-02 15:06:56,314 INFO L226 Difference]: Without dead ends: 24 [2023-04-02 15:06:56,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 15:06:56,322 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:06:56,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:06:56,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-02 15:06:56,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-02 15:06:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 15:06:56,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-04-02 15:06:56,348 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 17 [2023-04-02 15:06:56,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:06:56,348 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-04-02 15:06:56,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:06:56,349 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-04-02 15:06:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 15:06:56,350 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:06:56,350 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:06:56,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 15:06:56,551 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 15:06:56,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:06:56,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:06:56,553 INFO L85 PathProgramCache]: Analyzing trace with hash 462675951, now seen corresponding path program 1 times [2023-04-02 15:06:56,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:06:56,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11835280] [2023-04-02 15:06:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:06:56,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:06:56,582 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:06:56,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960749926] [2023-04-02 15:06:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:06:56,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:06:56,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:06:56,593 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 15:06:56,597 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 15:06:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:06:56,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 15:06:56,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:06:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 15:06:56,731 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:06:56,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:06:56,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11835280] [2023-04-02 15:06:56,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:06:56,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960749926] [2023-04-02 15:06:56,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960749926] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:06:56,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:06:56,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 15:06:56,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252486105] [2023-04-02 15:06:56,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:06:56,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:06:56,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:06:56,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:06:56,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:06:56,736 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 15:06:56,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:06:56,776 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2023-04-02 15:06:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 15:06:56,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-04-02 15:06:56,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:06:56,778 INFO L225 Difference]: With dead ends: 31 [2023-04-02 15:06:56,778 INFO L226 Difference]: Without dead ends: 26 [2023-04-02 15:06:56,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 15:06:56,779 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:06:56,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 68 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:06:56,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-02 15:06:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-02 15:06:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 15:06:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-04-02 15:06:56,786 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 25 [2023-04-02 15:06:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:06:56,786 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-04-02 15:06:56,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 15:06:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-04-02 15:06:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 15:06:56,787 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:06:56,787 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:06:56,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 15:06:56,993 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 15:06:56,993 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:06:56,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:06:56,994 INFO L85 PathProgramCache]: Analyzing trace with hash 727425456, now seen corresponding path program 1 times [2023-04-02 15:06:56,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:06:56,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360383098] [2023-04-02 15:06:56,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:06:56,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:06:57,021 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:06:57,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542010250] [2023-04-02 15:06:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:06:57,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:06:57,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:06:57,027 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 15:06:57,030 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 15:06:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:06:57,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 15:06:57,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:06:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 15:06:57,171 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:06:57,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:06:57,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360383098] [2023-04-02 15:06:57,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:06:57,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542010250] [2023-04-02 15:06:57,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542010250] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:06:57,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:06:57,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 15:06:57,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822396747] [2023-04-02 15:06:57,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:06:57,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:06:57,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:06:57,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:06:57,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:06:57,176 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 15:06:57,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:06:57,257 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2023-04-02 15:06:57,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 15:06:57,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-04-02 15:06:57,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:06:57,258 INFO L225 Difference]: With dead ends: 49 [2023-04-02 15:06:57,258 INFO L226 Difference]: Without dead ends: 31 [2023-04-02 15:06:57,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-02 15:06:57,261 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:06:57,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 52 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:06:57,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-02 15:06:57,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2023-04-02 15:06:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 15:06:57,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2023-04-02 15:06:57,275 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 28 [2023-04-02 15:06:57,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:06:57,276 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2023-04-02 15:06:57,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 15:06:57,277 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2023-04-02 15:06:57,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-02 15:06:57,277 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:06:57,278 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:06:57,287 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 15:06:57,483 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 15:06:57,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:06:57,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:06:57,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1455674232, now seen corresponding path program 1 times [2023-04-02 15:06:57,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:06:57,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655411531] [2023-04-02 15:06:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:06:57,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:06:57,504 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:06:57,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840962546] [2023-04-02 15:06:57,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:06:57,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:06:57,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:06:57,510 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 15:06:57,511 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 15:06:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:06:57,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 15:06:57,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:06:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 15:06:57,619 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:06:57,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:06:57,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655411531] [2023-04-02 15:06:57,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:06:57,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840962546] [2023-04-02 15:06:57,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840962546] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:06:57,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:06:57,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 15:06:57,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764145424] [2023-04-02 15:06:57,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:06:57,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 15:06:57,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:06:57,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 15:06:57,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 15:06:57,625 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 15:06:57,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:06:57,675 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2023-04-02 15:06:57,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 15:06:57,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-04-02 15:06:57,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:06:57,676 INFO L225 Difference]: With dead ends: 48 [2023-04-02 15:06:57,676 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 15:06:57,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:06:57,682 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:06:57,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 48 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:06:57,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 15:06:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-04-02 15:06:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 15:06:57,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-04-02 15:06:57,689 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 30 [2023-04-02 15:06:57,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:06:57,689 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-04-02 15:06:57,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 15:06:57,690 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-04-02 15:06:57,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 15:06:57,690 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:06:57,691 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:06:57,700 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 15:06:57,897 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 15:06:57,898 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:06:57,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:06:57,898 INFO L85 PathProgramCache]: Analyzing trace with hash 969804685, now seen corresponding path program 1 times [2023-04-02 15:06:57,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:06:57,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961786404] [2023-04-02 15:06:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:06:57,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:06:57,916 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:06:57,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944364873] [2023-04-02 15:06:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:06:57,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:06:57,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:06:57,923 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 15:06:57,925 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 15:06:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:06:58,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-02 15:06:58,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:06:58,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 15:06:58,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 212 [2023-04-02 15:06:58,754 INFO L321 Elim1Store]: treesize reduction 402, result has 7.2 percent of original size [2023-04-02 15:06:58,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 245 treesize of output 341 [2023-04-02 15:06:59,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:06:59,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:06:59,154 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:06:59,157 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:06:59,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 364 treesize of output 540 [2023-04-02 15:06:59,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1300 treesize of output 1262 [2023-04-02 15:06:59,919 INFO L321 Elim1Store]: treesize reduction 71, result has 4.1 percent of original size [2023-04-02 15:06:59,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 486 treesize of output 335 [2023-04-02 15:07:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 15:07:00,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:07:13,703 WARN L223 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 104 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:07:13,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:07:13,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961786404] [2023-04-02 15:07:13,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:07:13,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944364873] [2023-04-02 15:07:13,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944364873] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:07:13,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1076924586] [2023-04-02 15:07:13,731 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-02 15:07:13,731 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:07:13,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:07:13,739 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:07:13,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:07:13,805 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:07:14,496 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 15:07:14,500 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-04-02 15:07:14,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:07:14,505 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:07:18,506 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '947#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-04-02 15:07:18,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:07:18,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 15:07:18,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-04-02 15:07:18,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757553036] [2023-04-02 15:07:18,507 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 15:07:18,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 15:07:18,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:07:18,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 15:07:18,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2056, Unknown=2, NotChecked=0, Total=2256 [2023-04-02 15:07:18,510 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 19 states, 16 states have (on average 1.25) internal successors, (20), 14 states have internal predecessors, (20), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 15:07:19,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:07:19,412 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2023-04-02 15:07:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-02 15:07:19,413 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.25) internal successors, (20), 14 states have internal predecessors, (20), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2023-04-02 15:07:19,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:07:19,415 INFO L225 Difference]: With dead ends: 58 [2023-04-02 15:07:19,415 INFO L226 Difference]: Without dead ends: 53 [2023-04-02 15:07:19,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=275, Invalid=2803, Unknown=2, NotChecked=0, Total=3080 [2023-04-02 15:07:19,416 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 15:07:19,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 112 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 15:07:19,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-02 15:07:19,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2023-04-02 15:07:19,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:07:19,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2023-04-02 15:07:19,428 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 31 [2023-04-02 15:07:19,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:07:19,429 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2023-04-02 15:07:19,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.25) internal successors, (20), 14 states have internal predecessors, (20), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 15:07:19,429 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2023-04-02 15:07:19,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 15:07:19,430 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:07:19,430 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:07:19,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 15:07:19,635 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 15:07:19,635 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:07:19,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:07:19,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1587805019, now seen corresponding path program 2 times [2023-04-02 15:07:19,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:07:19,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740311028] [2023-04-02 15:07:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:07:19,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:07:19,646 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:07:19,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602161000] [2023-04-02 15:07:19,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:07:19,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:07:19,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:07:19,648 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 15:07:19,652 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 15:07:19,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 15:07:19,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:07:19,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 15:07:19,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:07:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 15:07:19,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:07:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 15:07:19,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:07:19,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740311028] [2023-04-02 15:07:19,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:07:19,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602161000] [2023-04-02 15:07:19,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602161000] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:07:19,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [119057898] [2023-04-02 15:07:19,807 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-02 15:07:19,807 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:07:19,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:07:19,808 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:07:19,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:07:19,828 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:07:20,339 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 15:07:20,342 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-04-02 15:07:20,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:07:20,356 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:07:21,414 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1360#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-04-02 15:07:21,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:07:21,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:07:21,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-04-02 15:07:21,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587474399] [2023-04-02 15:07:21,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:07:21,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 15:07:21,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:07:21,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 15:07:21,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2023-04-02 15:07:21,416 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 15:07:21,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:07:21,614 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2023-04-02 15:07:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 15:07:21,615 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2023-04-02 15:07:21,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:07:21,616 INFO L225 Difference]: With dead ends: 74 [2023-04-02 15:07:21,616 INFO L226 Difference]: Without dead ends: 57 [2023-04-02 15:07:21,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 15:07:21,617 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:07:21,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 118 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:07:21,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-02 15:07:21,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2023-04-02 15:07:21,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:07:21,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-04-02 15:07:21,637 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 32 [2023-04-02 15:07:21,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:07:21,638 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-04-02 15:07:21,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 15:07:21,639 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-04-02 15:07:21,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 15:07:21,642 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:07:21,642 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:07:21,651 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 15:07:21,848 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 15:07:21,849 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:07:21,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:07:21,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1095407278, now seen corresponding path program 3 times [2023-04-02 15:07:21,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:07:21,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049415002] [2023-04-02 15:07:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:07:21,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:07:21,860 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:07:21,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867951158] [2023-04-02 15:07:21,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:07:21,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:07:21,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:07:21,861 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 15:07:21,884 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 15:07:21,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 15:07:21,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:07:21,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 15:07:21,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:07:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 15:07:21,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:07:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 15:07:22,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:07:22,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049415002] [2023-04-02 15:07:22,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:07:22,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867951158] [2023-04-02 15:07:22,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867951158] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:07:22,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [224582994] [2023-04-02 15:07:22,026 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-02 15:07:22,026 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:07:22,027 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:07:22,027 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:07:22,027 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:07:22,043 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:07:22,560 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 15:07:22,563 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-04-02 15:07:22,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:07:22,566 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:07:23,676 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1818#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-04-02 15:07:23,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:07:23,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:07:23,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-02 15:07:23,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275280791] [2023-04-02 15:07:23,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:07:23,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 15:07:23,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:07:23,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 15:07:23,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2023-04-02 15:07:23,678 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:07:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:07:23,855 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2023-04-02 15:07:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 15:07:23,855 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 34 [2023-04-02 15:07:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:07:23,856 INFO L225 Difference]: With dead ends: 87 [2023-04-02 15:07:23,856 INFO L226 Difference]: Without dead ends: 74 [2023-04-02 15:07:23,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 15:07:23,857 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:07:23,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 68 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:07:23,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-04-02 15:07:23,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2023-04-02 15:07:23,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.3125) internal successors, (63), 48 states have internal predecessors, (63), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 15:07:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2023-04-02 15:07:23,872 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 34 [2023-04-02 15:07:23,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:07:23,872 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2023-04-02 15:07:23,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:07:23,872 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2023-04-02 15:07:23,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-02 15:07:23,873 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:07:23,873 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:07:23,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-02 15:07:24,078 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 15:07:24,078 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:07:24,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:07:24,079 INFO L85 PathProgramCache]: Analyzing trace with hash -762208731, now seen corresponding path program 4 times [2023-04-02 15:07:24,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:07:24,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490316207] [2023-04-02 15:07:24,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:07:24,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:07:24,089 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:07:24,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540519578] [2023-04-02 15:07:24,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 15:07:24,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:07:24,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:07:24,090 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 15:07:24,108 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 15:07:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:07:24,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 15:07:24,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:07:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 15:07:24,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:07:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 15:07:24,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:07:24,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490316207] [2023-04-02 15:07:24,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:07:24,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540519578] [2023-04-02 15:07:24,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540519578] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:07:24,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [984007123] [2023-04-02 15:07:24,215 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-02 15:07:24,215 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:07:24,215 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:07:24,215 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:07:24,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:07:24,234 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:07:24,720 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 15:07:24,723 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-04-02 15:07:24,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:07:24,726 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:07:25,695 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2328#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-04-02 15:07:25,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:07:25,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:07:25,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-02 15:07:25,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514453087] [2023-04-02 15:07:25,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:07:25,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 15:07:25,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:07:25,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 15:07:25,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2023-04-02 15:07:25,697 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:07:25,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:07:25,824 INFO L93 Difference]: Finished difference Result 122 states and 151 transitions. [2023-04-02 15:07:25,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 15:07:25,825 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 35 [2023-04-02 15:07:25,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:07:25,825 INFO L225 Difference]: With dead ends: 122 [2023-04-02 15:07:25,825 INFO L226 Difference]: Without dead ends: 67 [2023-04-02 15:07:25,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 15:07:25,827 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:07:25,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 86 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:07:25,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-02 15:07:25,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2023-04-02 15:07:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 15:07:25,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2023-04-02 15:07:25,839 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 35 [2023-04-02 15:07:25,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:07:25,840 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2023-04-02 15:07:25,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:07:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2023-04-02 15:07:25,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 15:07:25,841 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:07:25,841 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:07:25,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 15:07:26,048 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 15:07:26,048 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:07:26,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:07:26,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1941850927, now seen corresponding path program 1 times [2023-04-02 15:07:26,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:07:26,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099411528] [2023-04-02 15:07:26,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:07:26,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:07:26,057 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:07:26,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090918626] [2023-04-02 15:07:26,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:07:26,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:07:26,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:07:26,059 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 15:07:26,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 15:07:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:07:26,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 75 conjunts are in the unsatisfiable core [2023-04-02 15:07:26,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:07:26,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 15:07:27,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 247 [2023-04-02 15:07:27,143 INFO L321 Elim1Store]: treesize reduction 427, result has 10.5 percent of original size [2023-04-02 15:07:27,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 280 treesize of output 384 [2023-04-02 15:07:27,369 INFO L321 Elim1Store]: treesize reduction 460, result has 18.3 percent of original size [2023-04-02 15:07:27,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 410 treesize of output 508 [2023-04-02 15:07:27,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:07:27,406 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:07:27,410 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:07:27,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 358 treesize of output 47 [2023-04-02 15:07:28,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 228 [2023-04-02 15:07:28,682 INFO L321 Elim1Store]: treesize reduction 601, result has 6.2 percent of original size [2023-04-02 15:07:28,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 261 treesize of output 350 [2023-04-02 15:07:28,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:07:28,778 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:07:28,780 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:07:28,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 3 [2023-04-02 15:07:29,545 INFO L321 Elim1Store]: treesize reduction 35, result has 7.9 percent of original size [2023-04-02 15:07:29,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 22 [2023-04-02 15:07:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 15:07:29,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:07:34,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:07:34,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099411528] [2023-04-02 15:07:34,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:07:34,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090918626] [2023-04-02 15:07:34,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090918626] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:07:34,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [371406276] [2023-04-02 15:07:34,807 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-02 15:07:34,808 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:07:34,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:07:34,808 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:07:34,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:07:34,836 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:07:35,629 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 15:07:35,632 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-04-02 15:07:35,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:07:35,636 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:07:37,312 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2856#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-04-02 15:07:37,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:07:37,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 15:07:37,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-04-02 15:07:37,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462440465] [2023-04-02 15:07:37,313 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 15:07:37,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 15:07:37,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:07:37,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 15:07:37,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2703, Unknown=0, NotChecked=0, Total=2970 [2023-04-02 15:07:37,315 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 26 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 states have internal predecessors, (24), 7 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:07:38,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:07:38,786 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2023-04-02 15:07:38,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-02 15:07:38,786 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 states have internal predecessors, (24), 7 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2023-04-02 15:07:38,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:07:38,786 INFO L225 Difference]: With dead ends: 67 [2023-04-02 15:07:38,786 INFO L226 Difference]: Without dead ends: 40 [2023-04-02 15:07:38,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=403, Invalid=3887, Unknown=0, NotChecked=0, Total=4290 [2023-04-02 15:07:38,788 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:07:38,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 156 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 15:07:38,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-02 15:07:38,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-04-02 15:07:38,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 15:07:38,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-04-02 15:07:38,797 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 40 [2023-04-02 15:07:38,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:07:38,797 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-04-02 15:07:38,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 states have internal predecessors, (24), 7 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:07:38,797 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-04-02 15:07:38,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 15:07:38,798 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:07:38,798 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:07:38,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 15:07:39,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:07:39,001 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:07:39,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:07:39,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1957299185, now seen corresponding path program 5 times [2023-04-02 15:07:39,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:07:39,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384523349] [2023-04-02 15:07:39,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:07:39,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:07:39,010 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:07:39,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66242406] [2023-04-02 15:07:39,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:07:39,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:07:39,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:07:39,011 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:07:39,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 15:07:40,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-04-02 15:07:40,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:07:40,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 92 conjunts are in the unsatisfiable core [2023-04-02 15:07:40,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:07:40,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 15:07:40,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-02 15:07:40,660 INFO L321 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2023-04-02 15:07:40,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2023-04-02 15:07:40,716 INFO L321 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2023-04-02 15:07:40,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 55 [2023-04-02 15:07:47,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 279 [2023-04-02 15:07:48,156 INFO L321 Elim1Store]: treesize reduction 1105, result has 14.6 percent of original size [2023-04-02 15:07:48,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 35 case distinctions, treesize of input 312 treesize of output 532 [2023-04-02 15:07:56,891 WARN L223 SmtUtils]: Spent 6.49s on a formula simplification. DAG size of input: 142 DAG size of output: 115 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:08:00,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 387 treesize of output 361 [2023-04-02 15:08:53,648 WARN L223 SmtUtils]: Spent 52.92s on a formula simplification. DAG size of input: 250 DAG size of output: 199 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-04-02 15:08:53,651 INFO L321 Elim1Store]: treesize reduction 186, result has 80.3 percent of original size [2023-04-02 15:08:53,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 5739 treesize of output 5788