/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-examples/standard_copy5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 13:58:31,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 13:58:31,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 13:58:32,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 13:58:32,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 13:58:32,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 13:58:32,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 13:58:32,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 13:58:32,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 13:58:32,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 13:58:32,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 13:58:32,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 13:58:32,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 13:58:32,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 13:58:32,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 13:58:32,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 13:58:32,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 13:58:32,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 13:58:32,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 13:58:32,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 13:58:32,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 13:58:32,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 13:58:32,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 13:58:32,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 13:58:32,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 13:58:32,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 13:58:32,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 13:58:32,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 13:58:32,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 13:58:32,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 13:58:32,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 13:58:32,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 13:58:32,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 13:58:32,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 13:58:32,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 13:58:32,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 13:58:32,048 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 13:58:32,075 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 13:58:32,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 13:58:32,076 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 13:58:32,076 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 13:58:32,077 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 13:58:32,077 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 13:58:32,077 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 13:58:32,078 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 13:58:32,078 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 13:58:32,078 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 13:58:32,079 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 13:58:32,079 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 13:58:32,079 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 13:58:32,079 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 13:58:32,079 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 13:58:32,080 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 13:58:32,080 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 13:58:32,080 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 13:58:32,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 13:58:32,081 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 13:58:32,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 13:58:32,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 13:58:32,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 13:58:32,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 13:58:32,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 13:58:32,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 13:58:32,082 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 13:58:32,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 13:58:32,082 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 13:58:32,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 13:58:32,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 13:58:32,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 13:58:32,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 13:58:32,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 13:58:32,083 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 13:58:32,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 13:58:32,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 13:58:32,084 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 13:58:32,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 13:58:32,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 13:58:32,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 13:58:32,084 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 13:58:32,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 13:58:32,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 13:58:32,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 13:58:32,334 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 13:58:32,335 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 13:58:32,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy5_ground-1.i [2023-04-02 13:58:33,423 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 13:58:33,607 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 13:58:33,607 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy5_ground-1.i [2023-04-02 13:58:33,612 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc3cfd44f/437016948f70422bb767a23c4d3d3c96/FLAGf0ce19492 [2023-04-02 13:58:33,623 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc3cfd44f/437016948f70422bb767a23c4d3d3c96 [2023-04-02 13:58:33,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 13:58:33,626 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 13:58:33,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 13:58:33,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 13:58:33,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 13:58:33,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:58:33" (1/1) ... [2023-04-02 13:58:33,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4419beb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:33, skipping insertion in model container [2023-04-02 13:58:33,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:58:33" (1/1) ... [2023-04-02 13:58:33,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 13:58:33,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 13:58:33,769 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-examples/standard_copy5_ground-1.i[816,829] [2023-04-02 13:58:33,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 13:58:33,805 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 13:58:33,817 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-examples/standard_copy5_ground-1.i[816,829] [2023-04-02 13:58:33,828 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 13:58:33,838 INFO L208 MainTranslator]: Completed translation [2023-04-02 13:58:33,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:33 WrapperNode [2023-04-02 13:58:33,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 13:58:33,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 13:58:33,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 13:58:33,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 13:58:33,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:33" (1/1) ... [2023-04-02 13:58:33,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:33" (1/1) ... [2023-04-02 13:58:33,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:33" (1/1) ... [2023-04-02 13:58:33,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:33" (1/1) ... [2023-04-02 13:58:33,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:33" (1/1) ... [2023-04-02 13:58:33,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:33" (1/1) ... [2023-04-02 13:58:33,881 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:33" (1/1) ... [2023-04-02 13:58:33,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:33" (1/1) ... [2023-04-02 13:58:33,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 13:58:33,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 13:58:33,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 13:58:33,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 13:58:33,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:33" (1/1) ... [2023-04-02 13:58:33,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 13:58:33,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:33,918 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 13:58:33,921 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 13:58:33,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 13:58:33,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 13:58:33,949 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 13:58:33,949 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 13:58:33,949 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 13:58:33,949 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 13:58:33,949 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 13:58:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 13:58:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 13:58:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 13:58:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 13:58:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 13:58:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 13:58:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 13:58:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 13:58:33,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 13:58:33,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 13:58:33,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 13:58:33,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 13:58:33,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 13:58:33,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 13:58:34,013 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 13:58:34,015 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 13:58:34,214 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 13:58:34,313 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 13:58:34,313 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-04-02 13:58:34,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:58:34 BoogieIcfgContainer [2023-04-02 13:58:34,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 13:58:34,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 13:58:34,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 13:58:34,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 13:58:34,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:58:33" (1/3) ... [2023-04-02 13:58:34,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190da731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:58:34, skipping insertion in model container [2023-04-02 13:58:34,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:33" (2/3) ... [2023-04-02 13:58:34,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190da731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:58:34, skipping insertion in model container [2023-04-02 13:58:34,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:58:34" (3/3) ... [2023-04-02 13:58:34,322 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-1.i [2023-04-02 13:58:34,337 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 13:58:34,337 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 13:58:34,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 13:58:34,378 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;@7c22c603, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 13:58:34,378 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 13:58:34,381 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 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 13:58:34,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 13:58:34,387 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:34,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:34,388 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:34,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:34,393 INFO L85 PathProgramCache]: Analyzing trace with hash -969191236, now seen corresponding path program 1 times [2023-04-02 13:58:34,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:34,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338920512] [2023-04-02 13:58:34,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:34,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:34,671 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 13:58:34,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:34,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338920512] [2023-04-02 13:58:34,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338920512] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:58:34,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 13:58:34,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 13:58:34,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364011162] [2023-04-02 13:58:34,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:58:34,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 13:58:34,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:34,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 13:58:34,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:58:34,713 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 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 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:34,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:34,790 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2023-04-02 13:58:34,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 13:58:34,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-02 13:58:34,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:34,797 INFO L225 Difference]: With dead ends: 41 [2023-04-02 13:58:34,798 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 13:58:34,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:58:34,803 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:34,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:58:34,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 13:58:34,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-02 13:58:34,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:34,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2023-04-02 13:58:34,828 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 16 [2023-04-02 13:58:34,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:34,828 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-04-02 13:58:34,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:34,828 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2023-04-02 13:58:34,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 13:58:34,829 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:34,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:34,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 13:58:34,830 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:34,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:34,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2103064841, now seen corresponding path program 1 times [2023-04-02 13:58:34,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:34,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243604646] [2023-04-02 13:58:34,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:34,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:58:34,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:34,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243604646] [2023-04-02 13:58:34,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243604646] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:58:34,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 13:58:34,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 13:58:34,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571825180] [2023-04-02 13:58:34,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:58:34,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 13:58:34,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:34,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 13:58:34,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:58:34,988 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13:58:35,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:35,036 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2023-04-02 13:58:35,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 13:58:35,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 17 [2023-04-02 13:58:35,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:35,037 INFO L225 Difference]: With dead ends: 39 [2023-04-02 13:58:35,038 INFO L226 Difference]: Without dead ends: 26 [2023-04-02 13:58:35,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:58:35,039 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:35,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:58:35,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-02 13:58:35,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-02 13:58:35,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-04-02 13:58:35,045 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2023-04-02 13:58:35,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:35,045 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-04-02 13:58:35,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13:58:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-04-02 13:58:35,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-02 13:58:35,046 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:35,046 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] [2023-04-02 13:58:35,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 13:58:35,046 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:35,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:35,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1446045396, now seen corresponding path program 1 times [2023-04-02 13:58:35,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:35,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214908727] [2023-04-02 13:58:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:35,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 13:58:35,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:35,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214908727] [2023-04-02 13:58:35,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214908727] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:35,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622885912] [2023-04-02 13:58:35,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:35,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:35,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:35,137 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 13:58:35,149 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 13:58:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:35,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 13:58:35,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 13:58:35,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 13:58:35,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622885912] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:35,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [756826394] [2023-04-02 13:58:35,382 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 13:58:35,382 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:35,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:35,389 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:35,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:35,482 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:35,554 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 13:58:35,629 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 13:58:37,236 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:37,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:37,268 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:38,400 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '376#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_1| Int) (|v_main_~#a6~0.base_BEFORE_CALL_1| Int)) (and (<= 4 (+ |v_main_~#a6~0.base_BEFORE_CALL_1| |v_main_~#a1~0.base_BEFORE_CALL_1|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_1|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_1|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_1|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a6~0.base_BEFORE_CALL_1|) (<= 3 (+ |v_main_~#a6~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (not (= (select (select |#memory_int| |v_main_~#a6~0.base_BEFORE_CALL_1|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_1|) 0))) (<= 2 |v_main_~#a6~0.base_BEFORE_CALL_1|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:38,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:38,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:38,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 13:58:38,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605644733] [2023-04-02 13:58:38,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:38,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 13:58:38,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:38,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 13:58:38,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 13:58:38,403 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 13:58:38,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:38,451 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2023-04-02 13:58:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 13:58:38,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 22 [2023-04-02 13:58:38,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:38,453 INFO L225 Difference]: With dead ends: 48 [2023-04-02 13:58:38,453 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 13:58:38,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 13:58:38,454 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:38,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:58:38,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 13:58:38,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-02 13:58:38,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:38,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-04-02 13:58:38,459 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 22 [2023-04-02 13:58:38,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:38,459 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-04-02 13:58:38,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 13:58:38,460 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-04-02 13:58:38,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 13:58:38,460 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:38,460 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:38,469 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 13:58:38,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:38,667 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:38,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:38,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1634434111, now seen corresponding path program 2 times [2023-04-02 13:58:38,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:38,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778817951] [2023-04-02 13:58:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:38,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 13:58:38,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:38,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778817951] [2023-04-02 13:58:38,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778817951] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:38,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827420424] [2023-04-02 13:58:38,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:58:38,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:38,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:38,779 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 13:58:38,780 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 13:58:38,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 13:58:38,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:58:38,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 13:58:38,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 13:58:38,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 13:58:38,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827420424] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:38,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1241993178] [2023-04-02 13:58:38,904 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 13:58:38,904 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:38,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:38,905 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:38,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:38,921 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:38,948 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 13:58:38,971 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 13:58:39,873 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:39,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:39,895 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:40,809 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '675#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_2| Int) (|v_main_~#a6~0.base_BEFORE_CALL_2| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_2|)) (<= 2 |v_main_~#a6~0.base_BEFORE_CALL_2|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a6~0.base_BEFORE_CALL_2|) (<= 3 (+ |v_main_~#a6~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#a6~0.base_BEFORE_CALL_2| |v_main_~#a1~0.base_BEFORE_CALL_2|)) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_2|) 0) (select (select |#memory_int| |v_main_~#a6~0.base_BEFORE_CALL_2|) 0))) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_2|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_2|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:40,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:40,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:40,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 13:58:40,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125769168] [2023-04-02 13:58:40,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:40,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 13:58:40,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:40,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 13:58:40,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 13:58:40,812 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 13:58:40,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:40,866 INFO L93 Difference]: Finished difference Result 61 states and 86 transitions. [2023-04-02 13:58:40,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 13:58:40,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 25 [2023-04-02 13:58:40,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:40,868 INFO L225 Difference]: With dead ends: 61 [2023-04-02 13:58:40,868 INFO L226 Difference]: Without dead ends: 44 [2023-04-02 13:58:40,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 13:58:40,869 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:40,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:58:40,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-02 13:58:40,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-04-02 13:58:40,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2023-04-02 13:58:40,875 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 25 [2023-04-02 13:58:40,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:40,875 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2023-04-02 13:58:40,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 13:58:40,875 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2023-04-02 13:58:40,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 13:58:40,876 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:40,876 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:40,894 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 13:58:41,093 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,SelfDestructingSolverStorable3 [2023-04-02 13:58:41,094 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:41,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:41,094 INFO L85 PathProgramCache]: Analyzing trace with hash 582686140, now seen corresponding path program 3 times [2023-04-02 13:58:41,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:41,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727305800] [2023-04-02 13:58:41,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:41,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-02 13:58:41,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:41,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727305800] [2023-04-02 13:58:41,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727305800] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:41,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086283097] [2023-04-02 13:58:41,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:58:41,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:41,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:41,239 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 13:58:41,265 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 13:58:41,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:58:41,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:58:41,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 13:58:41,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-02 13:58:41,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-02 13:58:41,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086283097] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:41,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [247156886] [2023-04-02 13:58:41,435 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 13:58:41,436 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:41,436 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:41,436 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:41,436 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:41,452 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:41,508 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 13:58:41,531 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 13:58:42,266 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:42,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:42,281 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:43,072 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1126#(and (exists ((|v_main_~#a1~0.base_BEFORE_CALL_3| Int) (|v_main_~#a6~0.base_BEFORE_CALL_3| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_3|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a6~0.base_BEFORE_CALL_3|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_3|) (<= 3 (+ |v_main_~#a6~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (<= 2 |v_main_~#a6~0.base_BEFORE_CALL_3|) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_3|) 0) (select (select |#memory_int| |v_main_~#a6~0.base_BEFORE_CALL_3|) 0))) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_3|) (<= 4 (+ |v_main_~#a6~0.base_BEFORE_CALL_3| |v_main_~#a1~0.base_BEFORE_CALL_3|)))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:43,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:43,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:43,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 13:58:43,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592131900] [2023-04-02 13:58:43,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:43,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 13:58:43,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:43,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 13:58:43,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-04-02 13:58:43,075 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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 13:58:43,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:43,140 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2023-04-02 13:58:43,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 13:58:43,140 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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 40 [2023-04-02 13:58:43,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:43,141 INFO L225 Difference]: With dead ends: 84 [2023-04-02 13:58:43,141 INFO L226 Difference]: Without dead ends: 50 [2023-04-02 13:58:43,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-04-02 13:58:43,142 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:43,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:58:43,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-02 13:58:43,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-04-02 13:58:43,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:43,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2023-04-02 13:58:43,153 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 40 [2023-04-02 13:58:43,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:43,153 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2023-04-02 13:58:43,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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 13:58:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2023-04-02 13:58:43,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 13:58:43,154 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:43,154 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:43,163 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 13:58:43,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:43,355 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:43,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:43,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1571805852, now seen corresponding path program 4 times [2023-04-02 13:58:43,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:43,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971288455] [2023-04-02 13:58:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:43,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-02 13:58:43,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:43,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971288455] [2023-04-02 13:58:43,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971288455] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:43,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066980365] [2023-04-02 13:58:43,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:58:43,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:43,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:43,616 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 13:58:43,641 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 13:58:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:43,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 13:58:43,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-02 13:58:43,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-02 13:58:43,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066980365] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:43,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [512642970] [2023-04-02 13:58:43,929 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 13:58:43,929 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:43,930 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:43,930 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:43,930 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:43,944 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:43,968 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 13:58:43,987 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 13:58:44,667 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:44,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:44,684 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:45,550 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1683#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_4| Int) (|v_main_~#a6~0.base_BEFORE_CALL_4| Int)) (and (<= 2 |v_main_~#a6~0.base_BEFORE_CALL_4|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_4|)) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_4|) (<= 4 (+ |v_main_~#a6~0.base_BEFORE_CALL_4| |v_main_~#a1~0.base_BEFORE_CALL_4|)) (not (= (select (select |#memory_int| |v_main_~#a6~0.base_BEFORE_CALL_4|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_4|) 0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a6~0.base_BEFORE_CALL_4|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_4|) (<= 3 (+ |v_main_~#a6~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:45,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:45,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:45,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 13:58:45,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55996612] [2023-04-02 13:58:45,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:45,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 13:58:45,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:45,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 13:58:45,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 13:58:45,552 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 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 13:58:45,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:45,612 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2023-04-02 13:58:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 13:58:45,612 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 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 46 [2023-04-02 13:58:45,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:45,613 INFO L225 Difference]: With dead ends: 96 [2023-04-02 13:58:45,613 INFO L226 Difference]: Without dead ends: 62 [2023-04-02 13:58:45,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 13:58:45,614 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:45,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:58:45,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-04-02 13:58:45,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-04-02 13:58:45,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2023-04-02 13:58:45,621 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 46 [2023-04-02 13:58:45,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:45,622 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2023-04-02 13:58:45,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 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 13:58:45,622 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2023-04-02 13:58:45,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-02 13:58:45,623 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:45,623 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:45,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 13:58:45,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:45,831 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:45,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:45,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1861620644, now seen corresponding path program 5 times [2023-04-02 13:58:45,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:45,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159615960] [2023-04-02 13:58:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:45,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-02 13:58:46,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:46,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159615960] [2023-04-02 13:58:46,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159615960] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:46,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641623566] [2023-04-02 13:58:46,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:58:46,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:46,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:46,433 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 13:58:46,433 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 13:58:46,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 13:58:46,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:58:46,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 13:58:46,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2023-04-02 13:58:46,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:46,758 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2023-04-02 13:58:46,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641623566] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:46,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2085726002] [2023-04-02 13:58:46,760 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 13:58:46,760 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:46,760 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:46,761 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:46,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:46,777 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:46,806 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 13:58:46,828 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 13:58:47,501 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:47,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:47,526 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:48,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2370#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a6~0.base_BEFORE_CALL_5| Int) (|v_main_~#a1~0.base_BEFORE_CALL_5| Int)) (and (<= 2 |v_main_~#a6~0.base_BEFORE_CALL_5|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_5|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_5|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_5|) (<= 4 (+ |v_main_~#a6~0.base_BEFORE_CALL_5| |v_main_~#a1~0.base_BEFORE_CALL_5|)) (<= 3 (+ |v_main_~#a6~0.base_BEFORE_CALL_5| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a6~0.base_BEFORE_CALL_5|) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_5|) 0) (select (select |#memory_int| |v_main_~#a6~0.base_BEFORE_CALL_5|) 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:48,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:48,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:48,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-04-02 13:58:48,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335648057] [2023-04-02 13:58:48,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:48,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-02 13:58:48,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:48,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-02 13:58:48,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=1665, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 13:58:48,540 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 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 13:58:48,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:48,696 INFO L93 Difference]: Finished difference Result 127 states and 169 transitions. [2023-04-02 13:58:48,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-02 13:58:48,696 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 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 58 [2023-04-02 13:58:48,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:48,697 INFO L225 Difference]: With dead ends: 127 [2023-04-02 13:58:48,697 INFO L226 Difference]: Without dead ends: 93 [2023-04-02 13:58:48,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=405, Invalid=1665, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 13:58:48,699 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:48,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:58:48,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-04-02 13:58:48,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-04-02 13:58:48,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 87 states have (on average 1.0804597701149425) internal successors, (94), 87 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:48,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2023-04-02 13:58:48,707 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 58 [2023-04-02 13:58:48,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:48,708 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2023-04-02 13:58:48,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 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 13:58:48,708 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2023-04-02 13:58:48,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-02 13:58:48,709 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:48,709 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:48,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 13:58:48,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:48,916 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:48,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:48,916 INFO L85 PathProgramCache]: Analyzing trace with hash -956874167, now seen corresponding path program 6 times [2023-04-02 13:58:48,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:48,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264598654] [2023-04-02 13:58:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:48,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-04-02 13:58:49,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:49,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264598654] [2023-04-02 13:58:49,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264598654] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:49,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567630988] [2023-04-02 13:58:49,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:58:49,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:49,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:49,700 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:58:49,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 13:58:49,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:58:49,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:58:49,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 13:58:49,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-04-02 13:58:49,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-04-02 13:58:50,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567630988] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:50,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2114529439] [2023-04-02 13:58:50,553 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 13:58:50,553 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:50,553 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:50,553 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:50,553 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:50,584 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:50,608 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 13:58:50,624 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 13:58:51,334 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:51,347 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:51,359 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:52,312 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3383#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a6~0.base_BEFORE_CALL_6| Int) (|v_main_~#a1~0.base_BEFORE_CALL_6| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a6~0.base_BEFORE_CALL_6|) (<= 4 (+ |v_main_~#a6~0.base_BEFORE_CALL_6| |v_main_~#a1~0.base_BEFORE_CALL_6|)) (not (= (select (select |#memory_int| |v_main_~#a6~0.base_BEFORE_CALL_6|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_6|) 0))) (<= 3 (+ |v_main_~#a6~0.base_BEFORE_CALL_6| |#StackHeapBarrier|)) (<= 2 |v_main_~#a6~0.base_BEFORE_CALL_6|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_6|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_6|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_6|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:52,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:52,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:52,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-04-02 13:58:52,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410449501] [2023-04-02 13:58:52,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:52,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-02 13:58:52,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:52,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-02 13:58:52,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1315, Invalid=2467, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 13:58:52,317 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 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 13:58:52,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:52,402 INFO L93 Difference]: Finished difference Result 182 states and 218 transitions. [2023-04-02 13:58:52,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-02 13:58:52,403 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 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 89 [2023-04-02 13:58:52,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:52,404 INFO L225 Difference]: With dead ends: 182 [2023-04-02 13:58:52,404 INFO L226 Difference]: Without dead ends: 118 [2023-04-02 13:58:52,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1315, Invalid=2467, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 13:58:52,406 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:52,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:58:52,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-04-02 13:58:52,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2023-04-02 13:58:52,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 112 states have (on average 1.0625) internal successors, (119), 112 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:52,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2023-04-02 13:58:52,414 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 89 [2023-04-02 13:58:52,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:52,415 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2023-04-02 13:58:52,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 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 13:58:52,415 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2023-04-02 13:58:52,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-02 13:58:52,416 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:52,416 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:52,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 13:58:52,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:52,624 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:52,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:52,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1842836452, now seen corresponding path program 7 times [2023-04-02 13:58:52,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:52,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552486938] [2023-04-02 13:58:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:52,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-04-02 13:58:54,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:54,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552486938] [2023-04-02 13:58:54,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552486938] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:54,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685040782] [2023-04-02 13:58:54,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:58:54,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:54,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:54,761 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:58:54,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 13:58:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:55,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-02 13:58:55,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-04-02 13:58:55,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-04-02 13:58:57,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685040782] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:57,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [317444457] [2023-04-02 13:58:57,630 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 13:58:57,631 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:57,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:57,631 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:57,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:57,643 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:57,664 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 13:58:57,690 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 13:58:58,301 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:58,327 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:58,329 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:59,479 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4756#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_7| Int) (|v_main_~#a6~0.base_BEFORE_CALL_7| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a6~0.base_BEFORE_CALL_7|) (not (= (select (select |#memory_int| |v_main_~#a6~0.base_BEFORE_CALL_7|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_7|) 0))) (<= 2 |v_main_~#a6~0.base_BEFORE_CALL_7|) (<= 3 (+ |v_main_~#a6~0.base_BEFORE_CALL_7| |#StackHeapBarrier|)) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_7|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_7|) (<= 4 (+ |v_main_~#a6~0.base_BEFORE_CALL_7| |v_main_~#a1~0.base_BEFORE_CALL_7|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_7|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:59,479 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:59,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:59,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-04-02 13:58:59,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242557507] [2023-04-02 13:58:59,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:59,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-04-02 13:58:59,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:59,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-04-02 13:58:59,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5090, Invalid=7342, Unknown=0, NotChecked=0, Total=12432 [2023-04-02 13:58:59,485 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 101 states have internal predecessors, (117), 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 13:58:59,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:59,625 INFO L93 Difference]: Finished difference Result 232 states and 293 transitions. [2023-04-02 13:58:59,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-04-02 13:58:59,626 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 101 states have internal predecessors, (117), 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 114 [2023-04-02 13:58:59,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:59,627 INFO L225 Difference]: With dead ends: 232 [2023-04-02 13:58:59,627 INFO L226 Difference]: Without dead ends: 168 [2023-04-02 13:58:59,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5090, Invalid=7342, Unknown=0, NotChecked=0, Total=12432 [2023-04-02 13:58:59,630 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:59,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:58:59,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-04-02 13:58:59,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2023-04-02 13:58:59,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.0432098765432098) internal successors, (169), 162 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:59,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 174 transitions. [2023-04-02 13:58:59,646 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 174 transitions. Word has length 114 [2023-04-02 13:58:59,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:59,646 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 174 transitions. [2023-04-02 13:58:59,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 101 states have internal predecessors, (117), 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 13:58:59,646 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 174 transitions. [2023-04-02 13:58:59,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-04-02 13:58:59,647 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:59,648 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:59,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 13:58:59,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:59,848 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:59,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:59,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1560185668, now seen corresponding path program 8 times [2023-04-02 13:58:59,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:59,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374441657] [2023-04-02 13:58:59,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:59,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5126 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-04-02 13:59:05,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:59:05,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374441657] [2023-04-02 13:59:05,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374441657] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:59:05,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174404157] [2023-04-02 13:59:05,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:59:05,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:05,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:59:05,810 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:59:05,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 13:59:08,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 13:59:08,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:59:08,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 13:59:08,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:59:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5126 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5071 trivial. 0 not checked. [2023-04-02 13:59:09,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:59:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5126 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5071 trivial. 0 not checked. [2023-04-02 13:59:09,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174404157] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:59:09,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [816599902] [2023-04-02 13:59:09,781 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 13:59:09,781 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:59:09,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:59:09,781 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:59:09,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:59:09,791 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:59:09,824 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 13:59:09,839 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 13:59:10,470 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:59:10,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:59:10,482 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:59:12,192 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6651#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a6~0.base_BEFORE_CALL_8| Int) (|v_main_~#a1~0.base_BEFORE_CALL_8| Int)) (and (<= 3 (+ |v_main_~#a6~0.base_BEFORE_CALL_8| |#StackHeapBarrier|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_8|)) (<= 4 (+ |v_main_~#a6~0.base_BEFORE_CALL_8| |v_main_~#a1~0.base_BEFORE_CALL_8|)) (not (= (select (select |#memory_int| |v_main_~#a6~0.base_BEFORE_CALL_8|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_8|) 0))) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_8|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a6~0.base_BEFORE_CALL_8|) (<= 2 |v_main_~#a6~0.base_BEFORE_CALL_8|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_8|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:59:12,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:59:12,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:59:12,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 13, 13] total 123 [2023-04-02 13:59:12,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257188283] [2023-04-02 13:59:12,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:59:12,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-04-02 13:59:12,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:59:12,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-04-02 13:59:12,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5365, Invalid=12457, Unknown=0, NotChecked=0, Total=17822 [2023-04-02 13:59:12,198 INFO L87 Difference]: Start difference. First operand 168 states and 174 transitions. Second operand has 123 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 123 states have internal predecessors, (145), 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 13:59:12,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:59:12,581 INFO L93 Difference]: Finished difference Result 293 states and 365 transitions. [2023-04-02 13:59:12,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-04-02 13:59:12,581 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 123 states have internal predecessors, (145), 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 164 [2023-04-02 13:59:12,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:59:12,583 INFO L225 Difference]: With dead ends: 293 [2023-04-02 13:59:12,583 INFO L226 Difference]: Without dead ends: 229 [2023-04-02 13:59:12,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5365, Invalid=12457, Unknown=0, NotChecked=0, Total=17822 [2023-04-02 13:59:12,585 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 13:59:12,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 13:59:12,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-04-02 13:59:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2023-04-02 13:59:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 223 states have (on average 1.031390134529148) internal successors, (230), 223 states have internal predecessors, (230), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:59:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 235 transitions. [2023-04-02 13:59:12,597 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 235 transitions. Word has length 164 [2023-04-02 13:59:12,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:59:12,597 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 235 transitions. [2023-04-02 13:59:12,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 123 states have internal predecessors, (145), 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 13:59:12,597 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 235 transitions. [2023-04-02 13:59:12,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-04-02 13:59:12,600 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:59:12,600 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:59:12,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 13:59:12,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 13:59:12,811 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:59:12,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:59:12,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1982425015, now seen corresponding path program 9 times [2023-04-02 13:59:12,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:59:12,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030057203] [2023-04-02 13:59:12,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:59:12,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:59:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6215 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2023-04-02 13:59:18,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:59:18,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030057203] [2023-04-02 13:59:18,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030057203] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:59:18,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515548527] [2023-04-02 13:59:18,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:59:18,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:18,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:59:18,801 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:59:18,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 13:59:19,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:59:19,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:59:19,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 1825 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-02 13:59:19,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:59:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6215 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2023-04-02 13:59:19,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:59:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6215 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2023-04-02 13:59:28,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515548527] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:59:28,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1188086695] [2023-04-02 13:59:28,777 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 13:59:28,777 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:59:28,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:59:28,777 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:59:28,777 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:59:28,796 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:59:28,817 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 13:59:28,852 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 13:59:29,426 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:59:29,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:59:29,441 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:59:31,060 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9236#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_9| Int) (|v_main_~#a6~0.base_BEFORE_CALL_9| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_9|)) (<= 3 (+ |v_main_~#a6~0.base_BEFORE_CALL_9| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a6~0.base_BEFORE_CALL_9|) (not (= (select (select |#memory_int| |v_main_~#a6~0.base_BEFORE_CALL_9|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_9|) 0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_9|) (<= 2 |v_main_~#a6~0.base_BEFORE_CALL_9|) (<= 4 (+ |v_main_~#a6~0.base_BEFORE_CALL_9| |v_main_~#a1~0.base_BEFORE_CALL_9|)) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_9|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:59:31,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:59:31,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:59:31,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-04-02 13:59:31,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530623601] [2023-04-02 13:59:31,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:59:31,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-04-02 13:59:31,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:59:31,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-04-02 13:59:31,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20543, Invalid=25039, Unknown=0, NotChecked=0, Total=45582 [2023-04-02 13:59:31,070 INFO L87 Difference]: Start difference. First operand 229 states and 235 transitions. Second operand has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 203 states have internal predecessors, (219), 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 13:59:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:59:31,394 INFO L93 Difference]: Finished difference Result 454 states and 566 transitions. [2023-04-02 13:59:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-04-02 13:59:31,394 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 203 states have internal predecessors, (219), 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 225 [2023-04-02 13:59:31,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:59:31,396 INFO L225 Difference]: With dead ends: 454 [2023-04-02 13:59:31,396 INFO L226 Difference]: Without dead ends: 330 [2023-04-02 13:59:31,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=20543, Invalid=25039, Unknown=0, NotChecked=0, Total=45582 [2023-04-02 13:59:31,400 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:59:31,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:59:31,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-04-02 13:59:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2023-04-02 13:59:31,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 324 states have (on average 1.021604938271605) internal successors, (331), 324 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:59:31,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 336 transitions. [2023-04-02 13:59:31,415 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 336 transitions. Word has length 225 [2023-04-02 13:59:31,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:59:31,415 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 336 transitions. [2023-04-02 13:59:31,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 203 states have internal predecessors, (219), 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 13:59:31,415 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 336 transitions. [2023-04-02 13:59:31,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2023-04-02 13:59:31,419 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:59:31,420 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:59:31,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 13:59:31,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:31,628 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:59:31,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:59:31,628 INFO L85 PathProgramCache]: Analyzing trace with hash 972707036, now seen corresponding path program 10 times [2023-04-02 13:59:31,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:59:31,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211553416] [2023-04-02 13:59:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:59:31,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:59:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 21365 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2023-04-02 13:59:52,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:59:52,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211553416] [2023-04-02 13:59:52,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211553416] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:59:52,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497071699] [2023-04-02 13:59:52,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:59:52,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:52,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:59:52,017 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:59:52,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 13:59:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:52,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 2734 conjuncts, 202 conjunts are in the unsatisfiable core [2023-04-02 13:59:52,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:59:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 21365 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2023-04-02 13:59:52,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:00:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 21365 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2023-04-02 14:00:30,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497071699] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:00:30,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1808075025] [2023-04-02 14:00:30,823 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 14:00:30,823 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:00:30,823 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:00:30,824 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:00:30,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:00:30,839 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:00:30,862 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 14:00:30,877 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 14:00:31,420 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:00:31,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:00:31,434 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:00:33,909 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13153#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a6~0.base_BEFORE_CALL_10| Int) (|v_main_~#a1~0.base_BEFORE_CALL_10| Int)) (and (<= 2 |v_main_~#a6~0.base_BEFORE_CALL_10|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_10|) (<= 3 (+ |v_main_~#a1~0.base_BEFORE_CALL_10| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_10| |v_main_~#a6~0.base_BEFORE_CALL_10|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_10|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a6~0.base_BEFORE_CALL_10|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a6~0.base_BEFORE_CALL_10|)) (not (= (select (select |#memory_int| |v_main_~#a6~0.base_BEFORE_CALL_10|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_10|) 0))))) (= |#NULL.base| 0))' at error location [2023-04-02 14:00:33,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:00:33,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:00:33,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2023-04-02 14:00:33,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926390605] [2023-04-02 14:00:33,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:00:33,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2023-04-02 14:00:33,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:00:33,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2023-04-02 14:00:33,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81850, Invalid=90790, Unknown=0, NotChecked=0, Total=172640 [2023-04-02 14:00:33,926 INFO L87 Difference]: Start difference. First operand 330 states and 336 transitions. Second operand has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 405 states have internal predecessors, (421), 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 14:00:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:00:35,293 INFO L93 Difference]: Finished difference Result 656 states and 869 transitions. [2023-04-02 14:00:35,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2023-04-02 14:00:35,294 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 405 states have internal predecessors, (421), 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 326 [2023-04-02 14:00:35,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:00:35,295 INFO L225 Difference]: With dead ends: 656 [2023-04-02 14:00:35,296 INFO L226 Difference]: Without dead ends: 532 [2023-04-02 14:00:35,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1180 GetRequests, 766 SyntacticMatches, 0 SemanticMatches, 414 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7446 ImplicationChecksByTransitivity, 52.5s TimeCoverageRelationStatistics Valid=81850, Invalid=90790, Unknown=0, NotChecked=0, Total=172640 [2023-04-02 14:00:35,302 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 14:00:35,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 14:00:35,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2023-04-02 14:00:35,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 532. [2023-04-02 14:00:35,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 526 states have (on average 1.0133079847908746) internal successors, (533), 526 states have internal predecessors, (533), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:00:35,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 538 transitions. [2023-04-02 14:00:35,320 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 538 transitions. Word has length 326 [2023-04-02 14:00:35,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:00:35,321 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 538 transitions. [2023-04-02 14:00:35,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 405 states have internal predecessors, (421), 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 14:00:35,321 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 538 transitions. [2023-04-02 14:00:35,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2023-04-02 14:00:35,329 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:00:35,329 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:00:35,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 14:00:35,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 14:00:35,540 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:00:35,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:00:35,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1823065860, now seen corresponding path program 11 times [2023-04-02 14:00:35,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:00:35,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181085416] [2023-04-02 14:00:35,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:00:35,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:00:36,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:01:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 82268 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2023-04-02 14:01:58,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:01:58,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181085416] [2023-04-02 14:01:58,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181085416] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:01:58,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325652787] [2023-04-02 14:01:58,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:01:58,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:01:58,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:01:58,045 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:01:58,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process