/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/loop-acceleration/diamond_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:03:35,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:03:35,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:03:35,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:03:35,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:03:35,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:03:35,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:03:35,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:03:35,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:03:35,827 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:03:35,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:03:35,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:03:35,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:03:35,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:03:35,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:03:35,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:03:35,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:03:35,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:03:35,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:03:35,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:03:35,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:03:35,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:03:35,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:03:35,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:03:35,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 22:03:35,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 22:03:35,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 22:03:35,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 22:03:35,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 22:03:35,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 22:03:35,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:03:35,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:03:35,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:03:35,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:03:35,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:03:35,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:03:35,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:03:35,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:03:35,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:03:35,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:03:35,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:03:35,857 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 22:03:35,878 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:03:35,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:03:35,880 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:03:35,880 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:03:35,881 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:03:35,881 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:03:35,881 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:03:35,881 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:03:35,881 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:03:35,881 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:03:35,882 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:03:35,882 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:03:35,882 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:03:35,882 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:03:35,882 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:03:35,883 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:03:35,883 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:03:35,883 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:03:35,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:03:35,884 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:03:35,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:03:35,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:03:35,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:03:35,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:03:35,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:03:35,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:03:35,885 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:03:35,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:03:35,885 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:03:35,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:03:35,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:03:35,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:03:35,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:03:35,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:03:35,886 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:03:35,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:03:35,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:03:35,886 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:03:35,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:03:35,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:03:35,887 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:03:35,887 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:03:36,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:03:36,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:03:36,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:03:36,138 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:03:36,140 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:03:36,142 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/diamond_1-1.c [2023-04-02 22:03:37,245 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:03:37,397 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:03:37,398 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/diamond_1-1.c [2023-04-02 22:03:37,403 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c965686c7/4f8370871b444013b067cf70b760bcef/FLAG8cdaf1127 [2023-04-02 22:03:37,418 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c965686c7/4f8370871b444013b067cf70b760bcef [2023-04-02 22:03:37,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:03:37,423 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:03:37,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:03:37,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:03:37,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:03:37,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:03:37" (1/1) ... [2023-04-02 22:03:37,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@317baf05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:03:37, skipping insertion in model container [2023-04-02 22:03:37,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:03:37" (1/1) ... [2023-04-02 22:03:37,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:03:37,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:03:37,564 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/diamond_1-1.c[373,386] [2023-04-02 22:03:37,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:03:37,588 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:03:37,598 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/diamond_1-1.c[373,386] [2023-04-02 22:03:37,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:03:37,613 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:03:37,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:03:37 WrapperNode [2023-04-02 22:03:37,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:03:37,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:03:37,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:03:37,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:03:37,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:03:37" (1/1) ... [2023-04-02 22:03:37,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:03:37" (1/1) ... [2023-04-02 22:03:37,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:03:37" (1/1) ... [2023-04-02 22:03:37,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:03:37" (1/1) ... [2023-04-02 22:03:37,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:03:37" (1/1) ... [2023-04-02 22:03:37,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:03:37" (1/1) ... [2023-04-02 22:03:37,638 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:03:37" (1/1) ... [2023-04-02 22:03:37,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:03:37" (1/1) ... [2023-04-02 22:03:37,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:03:37,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:03:37,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:03:37,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:03:37,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:03:37" (1/1) ... [2023-04-02 22:03:37,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:03:37,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:03:37,666 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 22:03:37,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 22:03:37,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:03:37,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:03:37,696 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:03:37,696 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:03:37,696 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:03:37,696 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 22:03:37,696 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:03:37,697 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:03:37,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:03:37,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 22:03:37,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:03:37,697 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:03:37,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:03:37,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:03:37,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:03:37,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:03:37,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:03:37,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:03:37,758 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:03:37,759 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:03:37,837 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:03:37,859 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:03:37,860 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 22:03:37,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:03:37 BoogieIcfgContainer [2023-04-02 22:03:37,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:03:37,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:03:37,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:03:37,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:03:37,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:03:37" (1/3) ... [2023-04-02 22:03:37,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d03d074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:03:37, skipping insertion in model container [2023-04-02 22:03:37,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:03:37" (2/3) ... [2023-04-02 22:03:37,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d03d074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:03:37, skipping insertion in model container [2023-04-02 22:03:37,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:03:37" (3/3) ... [2023-04-02 22:03:37,869 INFO L112 eAbstractionObserver]: Analyzing ICFG diamond_1-1.c [2023-04-02 22:03:37,891 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:03:37,892 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:03:37,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:03:37,945 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;@b302746, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:03:37,945 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:03:37,949 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 22:03:37,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-02 22:03:37,956 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:03:37,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:03:37,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:03:37,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:03:37,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1285766347, now seen corresponding path program 1 times [2023-04-02 22:03:37,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:03:37,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836236521] [2023-04-02 22:03:37,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:03:37,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:03:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:03:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:03:38,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:03:38,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836236521] [2023-04-02 22:03:38,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836236521] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:03:38,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:03:38,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 22:03:38,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115163569] [2023-04-02 22:03:38,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:03:38,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 22:03:38,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:03:38,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 22:03:38,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:03:38,212 INFO L87 Difference]: Start difference. First operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:03:38,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:03:38,252 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-04-02 22:03:38,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 22:03:38,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 10 [2023-04-02 22:03:38,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:03:38,263 INFO L225 Difference]: With dead ends: 29 [2023-04-02 22:03:38,263 INFO L226 Difference]: Without dead ends: 12 [2023-04-02 22:03:38,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:03:38,268 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:03:38,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:03:38,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-04-02 22:03:38,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-04-02 22:03:38,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:03:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-04-02 22:03:38,316 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2023-04-02 22:03:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:03:38,317 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-04-02 22:03:38,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:03:38,317 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-04-02 22:03:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 22:03:38,317 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:03:38,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:03:38,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 22:03:38,318 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:03:38,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:03:38,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1269022352, now seen corresponding path program 1 times [2023-04-02 22:03:38,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:03:38,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465221046] [2023-04-02 22:03:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:03:38,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:03:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:03:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:03:38,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:03:38,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465221046] [2023-04-02 22:03:38,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465221046] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:03:38,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457077364] [2023-04-02 22:03:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:03:38,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:03:38,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:03:38,574 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:03:38,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 22:03:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:03:38,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 22:03:38,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:03:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:03:38,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:03:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:03:39,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457077364] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:03:39,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1751192956] [2023-04-02 22:03:39,086 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-02 22:03:39,086 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:03:39,090 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:03:39,095 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:03:39,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:03:39,176 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:03:39,234 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 22:03:39,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:03:39,275 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:03:39,550 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '156#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:03:39,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:03:39,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:03:39,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2023-04-02 22:03:39,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502570424] [2023-04-02 22:03:39,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:03:39,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 22:03:39,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:03:39,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 22:03:39,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-04-02 22:03:39,554 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:03:39,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:03:39,634 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2023-04-02 22:03:39,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 22:03:39,635 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-02 22:03:39,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:03:39,636 INFO L225 Difference]: With dead ends: 22 [2023-04-02 22:03:39,636 INFO L226 Difference]: Without dead ends: 14 [2023-04-02 22:03:39,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-04-02 22:03:39,641 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:03:39,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:03:39,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-04-02 22:03:39,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2023-04-02 22:03:39,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:03:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2023-04-02 22:03:39,649 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2023-04-02 22:03:39,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:03:39,649 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2023-04-02 22:03:39,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:03:39,649 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2023-04-02 22:03:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 22:03:39,650 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:03:39,650 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:03:39,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 22:03:39,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:03:39,856 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:03:39,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:03:39,856 INFO L85 PathProgramCache]: Analyzing trace with hash 749958507, now seen corresponding path program 2 times [2023-04-02 22:03:39,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:03:39,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826702821] [2023-04-02 22:03:39,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:03:39,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:03:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:03:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:03:40,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:03:40,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826702821] [2023-04-02 22:03:40,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826702821] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:03:40,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608598988] [2023-04-02 22:03:40,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:03:40,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:03:40,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:03:40,137 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:03:40,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 22:03:40,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 22:03:40,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:03:40,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-02 22:03:40,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:03:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:03:40,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:03:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:03:40,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608598988] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:03:40,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2106992753] [2023-04-02 22:03:40,691 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-02 22:03:40,692 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:03:40,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:03:40,692 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:03:40,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:03:40,732 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:03:40,765 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 22:03:40,783 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:03:40,789 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:03:41,037 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '305#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:03:41,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:03:41,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:03:41,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 12 [2023-04-02 22:03:41,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948593279] [2023-04-02 22:03:41,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:03:41,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 22:03:41,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:03:41,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 22:03:41,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-04-02 22:03:41,039 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:03:41,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:03:41,674 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2023-04-02 22:03:41,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 22:03:41,674 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-02 22:03:41,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:03:41,675 INFO L225 Difference]: With dead ends: 26 [2023-04-02 22:03:41,675 INFO L226 Difference]: Without dead ends: 18 [2023-04-02 22:03:41,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2023-04-02 22:03:41,676 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:03:41,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:03:41,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-02 22:03:41,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2023-04-02 22:03:41,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:03:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2023-04-02 22:03:41,682 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 12 [2023-04-02 22:03:41,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:03:41,682 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2023-04-02 22:03:41,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:03:41,683 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2023-04-02 22:03:41,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 22:03:41,683 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:03:41,683 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:03:41,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 22:03:41,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 22:03:41,891 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:03:41,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:03:41,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1080365397, now seen corresponding path program 3 times [2023-04-02 22:03:41,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:03:41,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446866732] [2023-04-02 22:03:41,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:03:41,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:03:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:03:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:03:42,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:03:42,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446866732] [2023-04-02 22:03:42,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446866732] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:03:42,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733812955] [2023-04-02 22:03:42,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:03:42,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:03:42,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:03:42,316 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:03:42,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 22:03:42,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:03:42,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:03:42,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 22:03:42,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:03:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:03:42,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:03:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:03:43,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733812955] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:03:43,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [871560081] [2023-04-02 22:03:43,096 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-02 22:03:43,096 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:03:43,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:03:43,096 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:03:43,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:03:43,125 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:03:43,152 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 22:03:43,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:03:43,176 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:03:43,477 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '505#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:03:43,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:03:43,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:03:43,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-04-02 22:03:43,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106301559] [2023-04-02 22:03:43,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:03:43,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 22:03:43,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:03:43,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 22:03:43,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2023-04-02 22:03:43,479 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:03:47,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:03:47,884 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2023-04-02 22:03:47,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 22:03:47,886 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-02 22:03:47,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:03:47,886 INFO L225 Difference]: With dead ends: 31 [2023-04-02 22:03:47,886 INFO L226 Difference]: Without dead ends: 26 [2023-04-02 22:03:47,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2023-04-02 22:03:47,889 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:03:47,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 22:03:47,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-02 22:03:47,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-04-02 22:03:47,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:03:47,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2023-04-02 22:03:47,903 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 16 [2023-04-02 22:03:47,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:03:47,903 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2023-04-02 22:03:47,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:03:47,904 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2023-04-02 22:03:47,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 22:03:47,905 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:03:47,905 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:03:47,912 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 22:03:48,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:03:48,113 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:03:48,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:03:48,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1495138603, now seen corresponding path program 4 times [2023-04-02 22:03:48,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:03:48,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356907199] [2023-04-02 22:03:48,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:03:48,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:03:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:03:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:03:49,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:03:49,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356907199] [2023-04-02 22:03:49,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356907199] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:03:49,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564012924] [2023-04-02 22:03:49,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 22:03:49,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:03:49,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:03:49,242 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:03:49,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 22:03:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:03:49,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 22:03:49,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:03:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:03:50,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:03:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:03:51,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564012924] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:03:51,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1390713485] [2023-04-02 22:03:51,392 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-02 22:03:51,392 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:03:51,392 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:03:51,392 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:03:51,393 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:03:51,413 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:03:51,433 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 22:03:51,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:03:51,459 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:03:51,909 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '800#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:03:51,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:03:51,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:03:51,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-04-02 22:03:51,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088974907] [2023-04-02 22:03:51,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:03:51,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-02 22:03:51,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:03:51,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-02 22:03:51,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=1296, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 22:03:51,912 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:04:35,359 WARN L223 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 112 DAG size of output: 27 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:04:52,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:04:52,873 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2023-04-02 22:04:52,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-02 22:04:52,873 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-04-02 22:04:52,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:04:52,874 INFO L225 Difference]: With dead ends: 47 [2023-04-02 22:04:52,874 INFO L226 Difference]: Without dead ends: 42 [2023-04-02 22:04:52,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 13 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 62.5s TimeCoverageRelationStatistics Valid=804, Invalid=2164, Unknown=2, NotChecked=0, Total=2970 [2023-04-02 22:04:52,876 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 22:04:52,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 22:04:52,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-02 22:04:52,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2023-04-02 22:04:52,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:04:52,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2023-04-02 22:04:52,889 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 24 [2023-04-02 22:04:52,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:04:52,889 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2023-04-02 22:04:52,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:04:52,889 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2023-04-02 22:04:52,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 22:04:52,890 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:04:52,890 INFO L195 NwaCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:04:52,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 22:04:53,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:04:53,098 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:04:53,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:04:53,098 INFO L85 PathProgramCache]: Analyzing trace with hash 733259307, now seen corresponding path program 5 times [2023-04-02 22:04:53,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:04:53,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381142552] [2023-04-02 22:04:53,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:04:53,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:04:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:04:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:04:55,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:04:55,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381142552] [2023-04-02 22:04:55,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381142552] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:04:55,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450586574] [2023-04-02 22:04:55,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:04:55,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:04:55,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:04:55,726 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:04:55,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 22:04:56,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-04-02 22:04:56,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:04:56,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-02 22:04:56,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:04:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:04:57,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:05:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:05:04,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450586574] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:05:04,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2081021163] [2023-04-02 22:05:04,083 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-02 22:05:04,083 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:05:04,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:05:04,083 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:05:04,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:05:04,105 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:05:04,129 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 22:05:04,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:05:04,146 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:05:05,231 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1306#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:05:05,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:05:05,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:05:05,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 36] total 68 [2023-04-02 22:05:05,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318567430] [2023-04-02 22:05:05,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:05:05,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-04-02 22:05:05,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:05:05,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-04-02 22:05:05,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1246, Invalid=4454, Unknown=0, NotChecked=0, Total=5700 [2023-04-02 22:05:05,236 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 68 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:39,278 WARN L223 SmtUtils]: Spent 33.23s on a formula simplification. DAG size of input: 195 DAG size of output: 27 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:06:03,042 WARN L223 SmtUtils]: Spent 21.59s on a formula simplification. DAG size of input: 189 DAG size of output: 21 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:06:28,427 WARN L223 SmtUtils]: Spent 21.82s on a formula simplification. DAG size of input: 183 DAG size of output: 21 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:06:54,449 WARN L223 SmtUtils]: Spent 19.06s on a formula simplification. DAG size of input: 177 DAG size of output: 21 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:07:23,105 WARN L223 SmtUtils]: Spent 19.14s on a formula simplification. DAG size of input: 171 DAG size of output: 21 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:07:49,859 WARN L223 SmtUtils]: Spent 16.00s on a formula simplification. DAG size of input: 165 DAG size of output: 21 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)