/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 EqDomain -i ../sv-benchmarks/c/array-multidimensional/min-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:58:12,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:58:12,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:58:12,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 08:58:12,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 08:58:12,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 08:58:12,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 08:58:12,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 08:58:12,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 08:58:12,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 08:58:12,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 08:58:12,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 08:58:12,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:58:12,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:58:12,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:58:12,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:58:12,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:58:12,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:58:12,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:58:12,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:58:12,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:58:12,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:58:12,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:58:12,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:58:12,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 08:58:12,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 08:58:12,653 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 08:58:12,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 08:58:12,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 08:58:12,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 08:58:12,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:58:12,655 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:58:12,656 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:58:12,656 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:58:12,657 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:58:12,657 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:58:12,658 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:58:12,658 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:58:12,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:58:12,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:58:12,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:58:12,663 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 [2023-04-01 08:58:12,699 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:58:12,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:58:12,700 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:58:12,700 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:58:12,701 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:58:12,701 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:58:12,701 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:58:12,701 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:58:12,702 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:58:12,702 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:58:12,702 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:58:12,703 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:58:12,703 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:58:12,703 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:58:12,703 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:58:12,703 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:58:12,703 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:58:12,703 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:58:12,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:58:12,704 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:58:12,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:58:12,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:58:12,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:58:12,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:58:12,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:58:12,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:58:12,705 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:58:12,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:58:12,705 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:58:12,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:58:12,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:58:12,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:58:12,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:58:12,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:58:12,707 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:58:12,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:58:12,707 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:58:12,707 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:58:12,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:58:12,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:58:12,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:58:12,707 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:58:12,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:58:12,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:58:12,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:58:12,988 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:58:12,989 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:58:12,990 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2023-04-01 08:58:14,120 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:58:14,297 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:58:14,298 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2023-04-01 08:58:14,304 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e485a9fa/9e4e7194dd8d497f978a1f20b20ae2dd/FLAG10431c199 [2023-04-01 08:58:14,319 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e485a9fa/9e4e7194dd8d497f978a1f20b20ae2dd [2023-04-01 08:58:14,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:58:14,323 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:58:14,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:58:14,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:58:14,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:58:14,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:58:14" (1/1) ... [2023-04-01 08:58:14,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cacb54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:14, skipping insertion in model container [2023-04-01 08:58:14,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:58:14" (1/1) ... [2023-04-01 08:58:14,343 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:58:14,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:58:14,504 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/min-3-n-u.c[321,334] [2023-04-01 08:58:14,536 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:58:14,545 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:58:14,556 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/min-3-n-u.c[321,334] [2023-04-01 08:58:14,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:58:14,595 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:58:14,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:14 WrapperNode [2023-04-01 08:58:14,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:58:14,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:58:14,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:58:14,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:58:14,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:14" (1/1) ... [2023-04-01 08:58:14,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:14" (1/1) ... [2023-04-01 08:58:14,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:14" (1/1) ... [2023-04-01 08:58:14,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:14" (1/1) ... [2023-04-01 08:58:14,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:14" (1/1) ... [2023-04-01 08:58:14,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:14" (1/1) ... [2023-04-01 08:58:14,643 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:14" (1/1) ... [2023-04-01 08:58:14,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:14" (1/1) ... [2023-04-01 08:58:14,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:58:14,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:58:14,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:58:14,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:58:14,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:14" (1/1) ... [2023-04-01 08:58:14,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:58:14,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:58:14,683 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) [2023-04-01 08:58:14,685 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 [2023-04-01 08:58:14,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:58:14,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:58:14,719 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:58:14,719 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 08:58:14,719 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:58:14,719 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:58:14,719 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:58:14,720 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:58:14,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:58:14,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 08:58:14,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 08:58:14,720 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:58:14,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 08:58:14,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:58:14,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:58:14,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:58:14,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:58:14,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:58:14,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:58:14,781 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:58:14,783 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:58:14,977 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:58:15,032 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:58:15,032 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-04-01 08:58:15,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:58:15 BoogieIcfgContainer [2023-04-01 08:58:15,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:58:15,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:58:15,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:58:15,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:58:15,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:58:14" (1/3) ... [2023-04-01 08:58:15,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b845efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:58:15, skipping insertion in model container [2023-04-01 08:58:15,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:14" (2/3) ... [2023-04-01 08:58:15,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b845efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:58:15, skipping insertion in model container [2023-04-01 08:58:15,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:58:15" (3/3) ... [2023-04-01 08:58:15,044 INFO L112 eAbstractionObserver]: Analyzing ICFG min-3-n-u.c [2023-04-01 08:58:15,059 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:58:15,059 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:58:15,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:58:15,138 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;@1760dbb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:58:15,138 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:58:15,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 08:58:15,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 08:58:15,147 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:58:15,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:58:15,148 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:58:15,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:58:15,153 INFO L85 PathProgramCache]: Analyzing trace with hash -135189333, now seen corresponding path program 1 times [2023-04-01 08:58:15,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:58:15,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965566757] [2023-04-01 08:58:15,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:15,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:58:15,237 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:58:15,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508035631] [2023-04-01 08:58:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:15,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:58:15,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:58:15,241 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) [2023-04-01 08:58:15,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 08:58:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:58:15,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:58:15,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:58:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:58:15,451 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:58:15,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:58:15,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965566757] [2023-04-01 08:58:15,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:58:15,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508035631] [2023-04-01 08:58:15,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508035631] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:58:15,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:58:15,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 08:58:15,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014324918] [2023-04-01 08:58:15,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:58:15,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:58:15,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:58:15,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:58:15,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:58:15,491 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:58:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:58:15,565 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2023-04-01 08:58:15,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:58:15,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-01 08:58:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:58:15,572 INFO L225 Difference]: With dead ends: 45 [2023-04-01 08:58:15,572 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 08:58:15,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:58:15,588 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:58:15,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 36 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:58:15,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 08:58:15,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-04-01 08:58:15,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:58:15,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2023-04-01 08:58:15,615 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 14 [2023-04-01 08:58:15,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:58:15,616 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2023-04-01 08:58:15,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:58:15,616 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2023-04-01 08:58:15,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 08:58:15,617 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:58:15,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:58:15,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 08:58:15,818 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 [2023-04-01 08:58:15,818 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:58:15,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:58:15,819 INFO L85 PathProgramCache]: Analyzing trace with hash 645229208, now seen corresponding path program 1 times [2023-04-01 08:58:15,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:58:15,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339779336] [2023-04-01 08:58:15,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:15,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:58:15,832 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:58:15,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354034085] [2023-04-01 08:58:15,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:15,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:58:15,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:58:15,834 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) [2023-04-01 08:58:15,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 08:58:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:58:15,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:58:15,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:58:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:58:15,928 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:58:15,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:58:15,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339779336] [2023-04-01 08:58:15,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:58:15,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354034085] [2023-04-01 08:58:15,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354034085] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:58:15,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:58:15,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 08:58:15,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840964110] [2023-04-01 08:58:15,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:58:15,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 08:58:15,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:58:15,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 08:58:15,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 08:58:15,932 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:58:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:58:15,985 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2023-04-01 08:58:15,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 08:58:15,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-01 08:58:15,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:58:15,988 INFO L225 Difference]: With dead ends: 50 [2023-04-01 08:58:15,988 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 08:58:15,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 08:58:15,990 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:58:15,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 34 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:58:15,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 08:58:15,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2023-04-01 08:58:15,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:58:15,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2023-04-01 08:58:15,999 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 16 [2023-04-01 08:58:15,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:58:15,999 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2023-04-01 08:58:16,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:58:16,000 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2023-04-01 08:58:16,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 08:58:16,000 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:58:16,000 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:58:16,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 08:58:16,206 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 [2023-04-01 08:58:16,207 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:58:16,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:58:16,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1211811428, now seen corresponding path program 1 times [2023-04-01 08:58:16,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:58:16,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899077283] [2023-04-01 08:58:16,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:16,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:58:16,222 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:58:16,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692073192] [2023-04-01 08:58:16,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:16,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:58:16,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:58:16,229 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) [2023-04-01 08:58:16,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 08:58:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:58:16,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:58:16,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:58:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:58:16,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:58:16,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:58:16,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899077283] [2023-04-01 08:58:16,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:58:16,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692073192] [2023-04-01 08:58:16,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692073192] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:58:16,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:58:16,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 08:58:16,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104999510] [2023-04-01 08:58:16,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:58:16,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 08:58:16,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:58:16,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 08:58:16,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 08:58:16,307 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:58:16,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:58:16,355 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2023-04-01 08:58:16,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 08:58:16,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 08:58:16,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:58:16,357 INFO L225 Difference]: With dead ends: 53 [2023-04-01 08:58:16,357 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 08:58:16,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 08:58:16,361 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:58:16,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 35 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:58:16,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 08:58:16,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2023-04-01 08:58:16,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:58:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2023-04-01 08:58:16,368 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 18 [2023-04-01 08:58:16,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:58:16,368 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2023-04-01 08:58:16,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:58:16,368 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2023-04-01 08:58:16,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 08:58:16,369 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:58:16,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:58:16,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 08:58:16,574 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 [2023-04-01 08:58:16,575 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:58:16,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:58:16,576 INFO L85 PathProgramCache]: Analyzing trace with hash -668252403, now seen corresponding path program 1 times [2023-04-01 08:58:16,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:58:16,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503017907] [2023-04-01 08:58:16,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:16,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:58:16,588 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:58:16,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565807985] [2023-04-01 08:58:16,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:16,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:58:16,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:58:16,593 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) [2023-04-01 08:58:16,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 08:58:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:58:16,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:58:16,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:58:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:58:16,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:58:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:58:16,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:58:16,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503017907] [2023-04-01 08:58:16,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:58:16,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565807985] [2023-04-01 08:58:16,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565807985] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:58:16,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1616026422] [2023-04-01 08:58:16,746 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 08:58:16,747 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:58:16,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:58:16,754 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:58:16,754 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:58:16,868 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 48 for LOIs [2023-04-01 08:58:17,829 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-01 08:58:18,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:58:18,087 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:58:18,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1616026422] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:58:18,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:58:18,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 5] total 16 [2023-04-01 08:58:18,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202816393] [2023-04-01 08:58:18,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:58:18,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 08:58:18,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:58:18,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 08:58:18,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-04-01 08:58:18,319 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 10 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:58:18,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:58:18,983 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2023-04-01 08:58:18,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 08:58:18,984 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-01 08:58:18,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:58:18,984 INFO L225 Difference]: With dead ends: 50 [2023-04-01 08:58:18,984 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 08:58:18,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2023-04-01 08:58:18,990 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:58:18,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 10 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:58:18,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 08:58:19,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2023-04-01 08:58:19,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:58:19,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-04-01 08:58:19,006 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 19 [2023-04-01 08:58:19,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:58:19,006 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-04-01 08:58:19,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:58:19,006 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-04-01 08:58:19,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 08:58:19,007 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:58:19,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:58:19,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 08:58:19,213 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 [2023-04-01 08:58:19,213 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:58:19,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:58:19,214 INFO L85 PathProgramCache]: Analyzing trace with hash 51150473, now seen corresponding path program 1 times [2023-04-01 08:58:19,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:58:19,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109438545] [2023-04-01 08:58:19,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:19,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:58:19,240 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:58:19,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624179945] [2023-04-01 08:58:19,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:19,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:58:19,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:58:19,248 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) [2023-04-01 08:58:19,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 08:58:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:58:19,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:58:19,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:58:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 08:58:19,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:58:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 08:58:19,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:58:19,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109438545] [2023-04-01 08:58:19,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:58:19,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624179945] [2023-04-01 08:58:19,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624179945] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:58:19,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1057041721] [2023-04-01 08:58:19,348 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:58:19,348 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:58:19,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:58:19,348 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:58:19,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:58:19,380 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 48 for LOIs [2023-04-01 08:58:19,799 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-01 08:58:20,153 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-01 08:58:20,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:58:20,160 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:58:20,490 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '996#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 08:58:20,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:58:20,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:58:20,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 08:58:20,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68850965] [2023-04-01 08:58:20,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 08:58:20,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 08:58:20,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:58:20,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 08:58:20,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2023-04-01 08:58:20,492 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:58:20,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:58:20,605 INFO L93 Difference]: Finished difference Result 70 states and 98 transitions. [2023-04-01 08:58:20,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 08:58:20,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-04-01 08:58:20,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:58:20,606 INFO L225 Difference]: With dead ends: 70 [2023-04-01 08:58:20,606 INFO L226 Difference]: Without dead ends: 46 [2023-04-01 08:58:20,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2023-04-01 08:58:20,607 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 73 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:58:20,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 44 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:58:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-01 08:58:20,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2023-04-01 08:58:20,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 08:58:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2023-04-01 08:58:20,628 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 24 [2023-04-01 08:58:20,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:58:20,628 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2023-04-01 08:58:20,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:58:20,628 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2023-04-01 08:58:20,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 08:58:20,629 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:58:20,629 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:58:20,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 08:58:20,833 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 [2023-04-01 08:58:20,834 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:58:20,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:58:20,834 INFO L85 PathProgramCache]: Analyzing trace with hash 644653617, now seen corresponding path program 2 times [2023-04-01 08:58:20,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:58:20,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727951513] [2023-04-01 08:58:20,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:20,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:58:20,853 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:58:20,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039565868] [2023-04-01 08:58:20,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:58:20,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:58:20,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:58:20,855 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) [2023-04-01 08:58:20,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 08:58:20,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 08:58:20,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:58:20,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:58:20,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:58:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-01 08:58:20,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:58:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-01 08:58:20,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:58:20,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727951513] [2023-04-01 08:58:20,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:58:20,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039565868] [2023-04-01 08:58:20,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039565868] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:58:20,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1881854045] [2023-04-01 08:58:20,996 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:58:20,996 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:58:20,997 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:58:20,997 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:58:20,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:58:21,047 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 48 for LOIs [2023-04-01 08:58:21,436 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-01 08:58:21,766 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-01 08:58:21,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:58:21,772 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:58:22,076 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1404#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 08:58:22,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:58:22,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:58:22,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 08:58:22,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538128383] [2023-04-01 08:58:22,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 08:58:22,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 08:58:22,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:58:22,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 08:58:22,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-04-01 08:58:22,078 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:58:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:58:22,227 INFO L93 Difference]: Finished difference Result 173 states and 228 transitions. [2023-04-01 08:58:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 08:58:22,228 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-04-01 08:58:22,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:58:22,231 INFO L225 Difference]: With dead ends: 173 [2023-04-01 08:58:22,231 INFO L226 Difference]: Without dead ends: 142 [2023-04-01 08:58:22,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-04-01 08:58:22,232 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 113 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:58:22,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 63 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:58:22,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-04-01 08:58:22,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 93. [2023-04-01 08:58:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 84 states have (on average 1.25) internal successors, (105), 84 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 08:58:22,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2023-04-01 08:58:22,276 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 30 [2023-04-01 08:58:22,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:58:22,276 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2023-04-01 08:58:22,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:58:22,276 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2023-04-01 08:58:22,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 08:58:22,282 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:58:22,282 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:58:22,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 08:58:22,487 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 [2023-04-01 08:58:22,488 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:58:22,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:58:22,488 INFO L85 PathProgramCache]: Analyzing trace with hash -853855549, now seen corresponding path program 3 times [2023-04-01 08:58:22,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:58:22,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43957912] [2023-04-01 08:58:22,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:22,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:58:22,526 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:58:22,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171244307] [2023-04-01 08:58:22,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:58:22,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:58:22,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:58:22,527 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) [2023-04-01 08:58:22,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 08:58:22,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:58:22,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:58:22,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-01 08:58:22,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:59:01,679 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 15 treesize of output 7 [2023-04-01 08:59:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 36 proven. 78 refuted. 27 times theorem prover too weak. 315 trivial. 0 not checked. [2023-04-01 08:59:01,703 INFO L327 TraceCheckSpWp]: Computing backward predicates...