/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-cav19/array_init_var_plus_ind3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:58:18,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:58:18,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:58:18,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:58:18,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:58:18,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:58:18,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:58:18,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:58:18,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:58:18,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:58:18,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:58:18,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 02:58:18,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 02:58:18,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 02:58:18,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 02:58:18,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 02:58:18,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 02:58:18,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 02:58:18,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 02:58:18,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 02:58:18,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 02:58:18,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 02:58:18,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 02:58:18,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 02:58:18,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 02:58:18,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:58:18,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:58:18,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:58:18,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:58:18,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:58:18,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:58:18,806 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:58:18,806 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:58:18,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:58:18,807 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:58:18,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:58:18,814 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 02:58:18,836 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:58:18,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:58:18,837 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:58:18,837 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:58:18,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:58:18,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:58:18,838 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:58:18,838 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:58:18,838 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:58:18,838 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:58:18,838 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:58:18,838 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:58:18,838 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:58:18,838 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:58:18,838 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:58:18,838 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:58:18,838 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:58:18,839 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:58:18,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:58:18,839 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:58:18,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:58:18,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:58:18,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:58:18,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:58:18,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:58:18,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:58:18,840 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:58:18,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:58:18,840 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:58:18,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:58:18,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:58:18,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:58:18,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:58:18,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:58:18,840 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:58:18,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:58:18,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:58:18,840 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:58:18,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:58:18,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:58:18,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:58:18,841 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:58:18,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:58:18,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:58:18,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:58:18,981 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:58:18,981 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:58:18,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2023-04-01 02:58:19,958 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:58:20,175 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:58:20,176 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2023-04-01 02:58:20,180 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee11f4776/f5838a2960ca424da2eec70c8614f60d/FLAG6544c2480 [2023-04-01 02:58:20,191 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee11f4776/f5838a2960ca424da2eec70c8614f60d [2023-04-01 02:58:20,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:58:20,194 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:58:20,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:58:20,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:58:20,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:58:20,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:58:20" (1/1) ... [2023-04-01 02:58:20,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69991cbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:20, skipping insertion in model container [2023-04-01 02:58:20,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:58:20" (1/1) ... [2023-04-01 02:58:20,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:58:20,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:58:20,300 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-cav19/array_init_var_plus_ind3.c[415,428] [2023-04-01 02:58:20,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:58:20,315 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:58:20,323 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-cav19/array_init_var_plus_ind3.c[415,428] [2023-04-01 02:58:20,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:58:20,335 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:58:20,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:20 WrapperNode [2023-04-01 02:58:20,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:58:20,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:58:20,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:58:20,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:58:20,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:20" (1/1) ... [2023-04-01 02:58:20,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:20" (1/1) ... [2023-04-01 02:58:20,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:20" (1/1) ... [2023-04-01 02:58:20,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:20" (1/1) ... [2023-04-01 02:58:20,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:20" (1/1) ... [2023-04-01 02:58:20,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:20" (1/1) ... [2023-04-01 02:58:20,358 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:20" (1/1) ... [2023-04-01 02:58:20,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:20" (1/1) ... [2023-04-01 02:58:20,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:58:20,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:58:20,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:58:20,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:58:20,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:20" (1/1) ... [2023-04-01 02:58:20,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:58:20,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:58:20,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 02:58:20,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 02:58:20,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:58:20,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:58:20,419 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:58:20,419 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 02:58:20,419 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:58:20,419 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:58:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:58:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:58:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:58:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:58:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 02:58:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:58:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:58:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:58:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 02:58:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:58:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:58:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:58:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:58:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:58:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:58:20,467 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:58:20,468 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:58:20,626 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:58:20,664 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:58:20,664 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 02:58:20,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:58:20 BoogieIcfgContainer [2023-04-01 02:58:20,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:58:20,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:58:20,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:58:20,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:58:20,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:58:20" (1/3) ... [2023-04-01 02:58:20,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9fc4d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:58:20, skipping insertion in model container [2023-04-01 02:58:20,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:20" (2/3) ... [2023-04-01 02:58:20,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9fc4d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:58:20, skipping insertion in model container [2023-04-01 02:58:20,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:58:20" (3/3) ... [2023-04-01 02:58:20,672 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind3.c [2023-04-01 02:58:20,704 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:58:20,704 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:58:20,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:58:20,754 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;@45959c07, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:58:20,754 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:58:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:58:20,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 02:58:20,762 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:58:20,763 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:58:20,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:58:20,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:58:20,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1238852914, now seen corresponding path program 1 times [2023-04-01 02:58:20,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:58:20,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700321764] [2023-04-01 02:58:20,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:20,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:58:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:20,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:58:20,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700321764] [2023-04-01 02:58:20,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700321764] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:58:20,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:58:20,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 02:58:20,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645794124] [2023-04-01 02:58:20,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:58:20,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 02:58:20,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:58:21,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 02:58:21,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:58:21,023 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:21,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:58:21,070 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-04-01 02:58:21,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 02:58:21,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 02:58:21,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:58:21,076 INFO L225 Difference]: With dead ends: 40 [2023-04-01 02:58:21,077 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 02:58:21,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:58:21,081 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:58:21,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 22 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:58:21,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 02:58:21,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2023-04-01 02:58:21,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:58:21,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-01 02:58:21,108 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2023-04-01 02:58:21,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:58:21,108 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-01 02:58:21,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:21,109 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-01 02:58:21,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 02:58:21,110 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:58:21,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:58:21,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:58:21,112 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:58:21,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:58:21,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1744764798, now seen corresponding path program 1 times [2023-04-01 02:58:21,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:58:21,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569880693] [2023-04-01 02:58:21,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:21,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:58:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:21,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:58:21,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569880693] [2023-04-01 02:58:21,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569880693] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:58:21,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:58:21,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 02:58:21,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861388658] [2023-04-01 02:58:21,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:58:21,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 02:58:21,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:58:21,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 02:58:21,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:58:21,227 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:21,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:58:21,252 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2023-04-01 02:58:21,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 02:58:21,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 13 [2023-04-01 02:58:21,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:58:21,253 INFO L225 Difference]: With dead ends: 30 [2023-04-01 02:58:21,253 INFO L226 Difference]: Without dead ends: 19 [2023-04-01 02:58:21,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:58:21,254 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:58:21,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:58:21,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-01 02:58:21,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-01 02:58:21,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:58:21,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-04-01 02:58:21,260 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2023-04-01 02:58:21,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:58:21,260 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-04-01 02:58:21,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:21,261 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-04-01 02:58:21,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 02:58:21,261 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:58:21,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:58:21,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 02:58:21,262 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:58:21,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:58:21,262 INFO L85 PathProgramCache]: Analyzing trace with hash -134139207, now seen corresponding path program 1 times [2023-04-01 02:58:21,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:58:21,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098609504] [2023-04-01 02:58:21,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:21,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:58:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:21,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:58:21,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098609504] [2023-04-01 02:58:21,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098609504] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:58:21,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958823984] [2023-04-01 02:58:21,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:21,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:58:21,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:58:21,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:58:21,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 02:58:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:21,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:58:21,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:58:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:21,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:58:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:21,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958823984] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:58:21,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [514567223] [2023-04-01 02:58:21,606 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 02:58:21,606 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:58:21,615 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:58:21,619 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:58:21,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:58:21,690 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:58:21,895 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-04-01 02:58:21,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:58:21,931 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:58:22,350 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '275#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (and (<= 2 |v_main_~#a~0.base_BEFORE_CALL_1|) (< 0 (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) 16)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_1|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_1|)))) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2023-04-01 02:58:22,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:58:22,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:58:22,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-04-01 02:58:22,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086174134] [2023-04-01 02:58:22,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:58:22,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 02:58:22,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:58:22,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 02:58:22,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2023-04-01 02:58:22,354 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 02:58:22,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:58:22,451 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2023-04-01 02:58:22,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 02:58:22,451 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 14 [2023-04-01 02:58:22,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:58:22,453 INFO L225 Difference]: With dead ends: 44 [2023-04-01 02:58:22,453 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 02:58:22,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2023-04-01 02:58:22,456 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:58:22,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 64 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:58:22,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 02:58:22,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2023-04-01 02:58:22,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 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) [2023-04-01 02:58:22,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-04-01 02:58:22,466 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2023-04-01 02:58:22,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:58:22,467 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-04-01 02:58:22,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 02:58:22,467 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-04-01 02:58:22,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 02:58:22,468 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:58:22,468 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:58:22,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 02:58:22,673 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 [2023-04-01 02:58:22,673 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:58:22,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:58:22,674 INFO L85 PathProgramCache]: Analyzing trace with hash 628245036, now seen corresponding path program 1 times [2023-04-01 02:58:22,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:58:22,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517098669] [2023-04-01 02:58:22,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:22,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:58:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:22,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:58:22,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517098669] [2023-04-01 02:58:22,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517098669] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:58:22,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790147519] [2023-04-01 02:58:22,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:22,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:58:22,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:58:22,782 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:58:22,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 02:58:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:22,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 02:58:22,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:58:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:22,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:58:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:22,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790147519] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:58:22,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1594334475] [2023-04-01 02:58:22,903 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 02:58:22,904 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:58:22,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:58:22,904 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:58:22,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:58:22,921 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:58:23,034 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-01 02:58:23,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:58:23,059 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:58:23,510 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '505#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a~0.base_BEFORE_CALL_2| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_2|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_2|)) (< 0 (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) 16)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_2|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2023-04-01 02:58:23,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:58:23,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:58:23,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-04-01 02:58:23,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099328754] [2023-04-01 02:58:23,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:58:23,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 02:58:23,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:58:23,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 02:58:23,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-04-01 02:58:23,512 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:23,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:58:23,563 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2023-04-01 02:58:23,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 02:58:23,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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 [2023-04-01 02:58:23,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:58:23,567 INFO L225 Difference]: With dead ends: 42 [2023-04-01 02:58:23,567 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 02:58:23,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-04-01 02:58:23,568 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:58:23,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 86 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:58:23,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 02:58:23,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 02:58:23,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:58:23,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-04-01 02:58:23,571 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 17 [2023-04-01 02:58:23,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:58:23,571 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-04-01 02:58:23,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-04-01 02:58:23,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 02:58:23,572 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:58:23,572 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:58:23,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 02:58:23,772 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 [2023-04-01 02:58:23,773 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:58:23,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:58:23,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1459576549, now seen corresponding path program 2 times [2023-04-01 02:58:23,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:58:23,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627764216] [2023-04-01 02:58:23,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:23,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:58:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:23,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:58:23,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627764216] [2023-04-01 02:58:23,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627764216] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:58:23,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985521930] [2023-04-01 02:58:23,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:58:23,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:58:23,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:58:23,910 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:58:23,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 02:58:23,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-01 02:58:24,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:58:24,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 02:58:24,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:58:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:24,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:58:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:24,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985521930] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:58:24,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1123111725] [2023-04-01 02:58:24,131 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 02:58:24,131 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:58:24,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:58:24,131 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:58:24,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:58:24,152 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:58:24,233 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-04-01 02:58:24,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:58:24,249 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:58:24,576 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '773#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_3|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_3|) (< 0 (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) 16)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_3|)))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2023-04-01 02:58:24,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:58:24,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:58:24,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-04-01 02:58:24,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511466925] [2023-04-01 02:58:24,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:58:24,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 02:58:24,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:58:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 02:58:24,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 02:58:24,578 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 02:58:24,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:58:24,750 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2023-04-01 02:58:24,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 02:58:24,751 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-04-01 02:58:24,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:58:24,751 INFO L225 Difference]: With dead ends: 78 [2023-04-01 02:58:24,751 INFO L226 Difference]: Without dead ends: 68 [2023-04-01 02:58:24,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 02:58:24,753 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 157 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:58:24,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 45 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:58:24,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-01 02:58:24,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 40. [2023-04-01 02:58:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:58:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2023-04-01 02:58:24,758 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 22 [2023-04-01 02:58:24,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:58:24,758 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2023-04-01 02:58:24,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 02:58:24,758 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2023-04-01 02:58:24,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 02:58:24,759 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:58:24,759 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:58:24,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 02:58:24,959 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 [2023-04-01 02:58:24,959 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:58:24,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:58:24,960 INFO L85 PathProgramCache]: Analyzing trace with hash 302169931, now seen corresponding path program 2 times [2023-04-01 02:58:24,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:58:24,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923901554] [2023-04-01 02:58:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:24,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:58:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:25,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:58:25,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923901554] [2023-04-01 02:58:25,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923901554] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:58:25,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6545539] [2023-04-01 02:58:25,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:58:25,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:58:25,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:58:25,249 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:58:25,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 02:58:25,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-01 02:58:25,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:58:25,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 02:58:25,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:58:25,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 02:58:25,468 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 02:58:25,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-04-01 02:58:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:25,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:58:25,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-04-01 02:58:25,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-04-01 02:58:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:25,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6545539] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:58:25,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [485451371] [2023-04-01 02:58:25,804 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 02:58:25,804 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:58:25,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:58:25,805 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:58:25,805 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:58:25,826 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:58:25,917 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-01 02:58:25,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:58:25,945 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:58:26,498 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1133#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a~0.base_BEFORE_CALL_4| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_4|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_4|) (< 0 (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) 16)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_4|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2023-04-01 02:58:26,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:58:26,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:58:26,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2023-04-01 02:58:26,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615832987] [2023-04-01 02:58:26,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:58:26,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 02:58:26,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:58:26,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 02:58:26,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 02:58:26,500 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:26,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:58:26,733 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2023-04-01 02:58:26,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 02:58:26,733 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-04-01 02:58:26,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:58:26,735 INFO L225 Difference]: With dead ends: 51 [2023-04-01 02:58:26,735 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 02:58:26,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 02:58:26,736 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:58:26,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 122 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:58:26,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 02:58:26,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-04-01 02:58:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:58:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-04-01 02:58:26,741 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 23 [2023-04-01 02:58:26,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:58:26,741 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-04-01 02:58:26,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-04-01 02:58:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 02:58:26,742 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:58:26,742 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:58:26,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 02:58:26,946 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 [2023-04-01 02:58:26,947 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:58:26,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:58:26,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1849125248, now seen corresponding path program 3 times [2023-04-01 02:58:26,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:58:26,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70271494] [2023-04-01 02:58:26,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:26,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:58:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:27,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:58:27,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70271494] [2023-04-01 02:58:27,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70271494] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:58:27,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752070432] [2023-04-01 02:58:27,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:58:27,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:58:27,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:58:27,257 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:58:27,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 02:58:27,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:58:27,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:58:27,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-01 02:58:27,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:58:27,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 02:58:27,407 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-04-01 02:58:27,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2023-04-01 02:58:27,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-04-01 02:58:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:27,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:58:27,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-04-01 02:58:27,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-04-01 02:58:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:27,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752070432] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:58:27,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2117187005] [2023-04-01 02:58:27,667 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 02:58:27,667 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:58:27,667 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:58:27,668 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:58:27,668 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:58:27,681 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:58:27,737 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-01 02:58:27,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:58:27,749 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:58:28,305 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1464#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_5| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_5|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_5|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_5|)) (< 0 (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_5|) 16)))) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2023-04-01 02:58:28,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:58:28,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:58:28,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2023-04-01 02:58:28,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904300624] [2023-04-01 02:58:28,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:58:28,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-01 02:58:28,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:58:28,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-01 02:58:28,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1360, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 02:58:28,308 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 27 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:28,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:58:28,503 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2023-04-01 02:58:28,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 02:58:28,503 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-04-01 02:58:28,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:58:28,504 INFO L225 Difference]: With dead ends: 49 [2023-04-01 02:58:28,504 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 02:58:28,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=151, Invalid=1571, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 02:58:28,505 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:58:28,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 163 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:58:28,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 02:58:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-04-01 02:58:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 39 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:58:28,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2023-04-01 02:58:28,511 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 25 [2023-04-01 02:58:28,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:58:28,511 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2023-04-01 02:58:28,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:28,511 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2023-04-01 02:58:28,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 02:58:28,512 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:58:28,512 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:58:28,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 02:58:28,716 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 [2023-04-01 02:58:28,716 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:58:28,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:58:28,717 INFO L85 PathProgramCache]: Analyzing trace with hash -570555466, now seen corresponding path program 1 times [2023-04-01 02:58:28,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:58:28,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817210202] [2023-04-01 02:58:28,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:28,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:58:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:28,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:58:28,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817210202] [2023-04-01 02:58:28,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817210202] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:58:28,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857850139] [2023-04-01 02:58:28,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:28,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:58:28,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:58:28,949 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:58:28,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 02:58:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:28,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 34 conjunts are in the unsatisfiable core [2023-04-01 02:58:28,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:58:29,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 02:58:29,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-04-01 02:58:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:29,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:58:29,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-04-01 02:58:29,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 02:58:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:29,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857850139] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:58:29,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [881999853] [2023-04-01 02:58:29,503 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 02:58:29,503 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:58:29,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:58:29,503 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:58:29,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:58:29,516 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:58:29,979 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 114 for LOIs [2023-04-01 02:58:30,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:58:30,122 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:58:33,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1848#(and (exists ((|v_main_~#a~0.offset_BEFORE_CALL_12| Int) (v_main_~i~0_BEFORE_CALL_10 Int) (v_main_~k~0_BEFORE_CALL_12 Int) (v_main_~j~0_BEFORE_CALL_10 Int) (|v_main_~#a~0.base_BEFORE_CALL_12| Int) (v_main_~x~0_BEFORE_CALL_8 Int)) (and (< 0 (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_12|) (+ (* v_main_~k~0_BEFORE_CALL_12 4) |v_main_~#a~0.offset_BEFORE_CALL_12|))) (or (and (<= v_main_~i~0_BEFORE_CALL_10 (+ 99995 v_main_~k~0_BEFORE_CALL_12)) (<= v_main_~x~0_BEFORE_CALL_8 (+ |#StackHeapBarrier| 2147483646)) (<= 1 |#StackHeapBarrier|) (<= 4 v_main_~k~0_BEFORE_CALL_12) (<= (+ v_main_~i~0_BEFORE_CALL_10 v_main_~j~0_BEFORE_CALL_10) 99999) (<= v_main_~i~0_BEFORE_CALL_10 (+ |v_main_~#a~0.base_BEFORE_CALL_12| 99997)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_12|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_10 |#StackHeapBarrier|)) (<= (+ v_main_~j~0_BEFORE_CALL_10 1) |#StackHeapBarrier|) (<= v_main_~x~0_BEFORE_CALL_8 2147483647) (<= (+ 4 v_main_~j~0_BEFORE_CALL_10) v_main_~k~0_BEFORE_CALL_12) (<= v_main_~x~0_BEFORE_CALL_8 (+ 2147483645 |v_main_~#a~0.base_BEFORE_CALL_12|)) (<= (+ v_main_~x~0_BEFORE_CALL_8 v_main_~j~0_BEFORE_CALL_10) 2147483647) (<= 0 v_main_~i~0_BEFORE_CALL_10) (<= v_main_~x~0_BEFORE_CALL_8 (+ 2147483647 v_main_~i~0_BEFORE_CALL_10)) (<= 6 (+ |v_main_~#a~0.base_BEFORE_CALL_12| v_main_~k~0_BEFORE_CALL_12)) (<= (+ v_main_~x~0_BEFORE_CALL_8 v_main_~i~0_BEFORE_CALL_10) 2147583646) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_12|) (<= 5 (+ |#StackHeapBarrier| v_main_~k~0_BEFORE_CALL_12)) (<= v_main_~i~0_BEFORE_CALL_10 (+ 99998 |#StackHeapBarrier|)) (<= 3 (+ |v_main_~#a~0.base_BEFORE_CALL_12| |#StackHeapBarrier|)) (<= v_main_~j~0_BEFORE_CALL_10 v_main_~i~0_BEFORE_CALL_10) (= |#NULL.offset| 0) (<= (+ 2 v_main_~j~0_BEFORE_CALL_10) |v_main_~#a~0.base_BEFORE_CALL_12|) (<= 4 (+ v_main_~i~0_BEFORE_CALL_10 v_main_~k~0_BEFORE_CALL_12)) (<= 2 (+ v_main_~i~0_BEFORE_CALL_10 |v_main_~#a~0.base_BEFORE_CALL_12|)) (<= v_main_~j~0_BEFORE_CALL_10 0) (<= v_main_~i~0_BEFORE_CALL_10 99999) (= |#NULL.base| 0) (= 100000 ~N~0) (<= v_main_~x~0_BEFORE_CALL_8 (+ 2147483643 v_main_~k~0_BEFORE_CALL_12)) (= |v_main_~#a~0.offset_BEFORE_CALL_12| 0)) (and (<= v_main_~i~0_BEFORE_CALL_10 (+ 99995 v_main_~k~0_BEFORE_CALL_12)) (<= 1 |#StackHeapBarrier|) (<= 4 v_main_~k~0_BEFORE_CALL_12) (<= (+ v_main_~i~0_BEFORE_CALL_10 v_main_~j~0_BEFORE_CALL_10) 99999) (<= v_main_~i~0_BEFORE_CALL_10 (+ |v_main_~#a~0.base_BEFORE_CALL_12| 99997)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_12|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_10 |#StackHeapBarrier|)) (<= (+ v_main_~j~0_BEFORE_CALL_10 1) |#StackHeapBarrier|) (<= (+ 4 v_main_~j~0_BEFORE_CALL_10) v_main_~k~0_BEFORE_CALL_12) (<= 0 v_main_~i~0_BEFORE_CALL_10) (<= 6 (+ |v_main_~#a~0.base_BEFORE_CALL_12| v_main_~k~0_BEFORE_CALL_12)) (<= 0 (+ v_main_~x~0_BEFORE_CALL_8 |v_main_~#a~0.base_BEFORE_CALL_12| 2147483646)) (<= 0 (+ v_main_~x~0_BEFORE_CALL_8 2147483648)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_12|) (<= 5 (+ |#StackHeapBarrier| v_main_~k~0_BEFORE_CALL_12)) (<= v_main_~i~0_BEFORE_CALL_10 (+ 99998 |#StackHeapBarrier|)) (<= v_main_~j~0_BEFORE_CALL_10 (+ v_main_~x~0_BEFORE_CALL_8 2147483648)) (<= 0 (+ v_main_~x~0_BEFORE_CALL_8 v_main_~i~0_BEFORE_CALL_10 2147483648)) (<= 3 (+ |v_main_~#a~0.base_BEFORE_CALL_12| |#StackHeapBarrier|)) (<= v_main_~j~0_BEFORE_CALL_10 v_main_~i~0_BEFORE_CALL_10) (<= 0 (+ v_main_~x~0_BEFORE_CALL_8 2147483647 |#StackHeapBarrier|)) (= |#NULL.offset| 0) (<= (+ 2 v_main_~j~0_BEFORE_CALL_10) |v_main_~#a~0.base_BEFORE_CALL_12|) (<= 4 (+ v_main_~i~0_BEFORE_CALL_10 v_main_~k~0_BEFORE_CALL_12)) (<= 2 (+ v_main_~i~0_BEFORE_CALL_10 |v_main_~#a~0.base_BEFORE_CALL_12|)) (<= v_main_~j~0_BEFORE_CALL_10 0) (<= v_main_~i~0_BEFORE_CALL_10 (+ v_main_~x~0_BEFORE_CALL_8 2147583647)) (<= v_main_~i~0_BEFORE_CALL_10 99999) (= |#NULL.base| 0) (= 100000 ~N~0) (<= 0 (+ v_main_~x~0_BEFORE_CALL_8 2147483644 v_main_~k~0_BEFORE_CALL_12)) (= |v_main_~#a~0.offset_BEFORE_CALL_12| 0))) (< v_main_~k~0_BEFORE_CALL_12 v_main_~i~0_BEFORE_CALL_10))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 02:58:33,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:58:33,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:58:33,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 36 [2023-04-01 02:58:33,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470154827] [2023-04-01 02:58:33,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:58:33,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-04-01 02:58:33,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:58:33,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-04-01 02:58:33,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2279, Unknown=2, NotChecked=0, Total=2450 [2023-04-01 02:58:33,332 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:58:33,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:58:33,837 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2023-04-01 02:58:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 02:58:33,839 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 32 [2023-04-01 02:58:33,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:58:33,840 INFO L225 Difference]: With dead ends: 66 [2023-04-01 02:58:33,840 INFO L226 Difference]: Without dead ends: 46 [2023-04-01 02:58:33,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=259, Invalid=3279, Unknown=2, NotChecked=0, Total=3540 [2023-04-01 02:58:33,842 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:58:33,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 227 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 02:58:33,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-01 02:58:33,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-04-01 02:58:33,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:58:33,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2023-04-01 02:58:33,847 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 32 [2023-04-01 02:58:33,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:58:33,848 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2023-04-01 02:58:33,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:58:33,848 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2023-04-01 02:58:33,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 02:58:33,848 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:58:33,850 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:58:33,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 02:58:34,074 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 [2023-04-01 02:58:34,074 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:58:34,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:58:34,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1928431583, now seen corresponding path program 2 times [2023-04-01 02:58:34,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:58:34,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673524601] [2023-04-01 02:58:34,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:34,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:58:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:34,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:58:34,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673524601] [2023-04-01 02:58:34,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673524601] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:58:34,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754252744] [2023-04-01 02:58:34,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:58:34,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:58:34,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:58:34,473 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:58:34,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 02:58:34,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-04-01 02:58:34,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:58:34,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 43 conjunts are in the unsatisfiable core [2023-04-01 02:58:34,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:58:34,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 02:58:34,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-01 02:58:34,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:58:34,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:58:34,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:58:34,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2023-04-01 02:58:34,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:58:34,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2023-04-01 02:58:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:34,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:58:35,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2023-04-01 02:58:35,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:58:35,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 303 treesize of output 291 [2023-04-01 02:58:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:35,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754252744] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:58:35,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [306192758] [2023-04-01 02:58:35,507 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 02:58:35,508 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:58:35,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:58:35,508 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:58:35,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:58:35,526 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:58:35,940 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 114 for LOIs [2023-04-01 02:58:36,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:58:36,075 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:58:40,058 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2296#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~j~0_BEFORE_CALL_17 Int) (v_main_~i~0_BEFORE_CALL_18 Int) (|v_main_~#a~0.offset_BEFORE_CALL_21| Int) (|v_main_~#a~0.base_BEFORE_CALL_21| Int) (v_main_~x~0_BEFORE_CALL_15 Int) (v_main_~k~0_BEFORE_CALL_21 Int)) (and (or (and (<= 2 (+ v_main_~i~0_BEFORE_CALL_18 |v_main_~#a~0.base_BEFORE_CALL_21|)) (<= 4 v_main_~k~0_BEFORE_CALL_21) (<= v_main_~i~0_BEFORE_CALL_18 (+ |v_main_~#a~0.base_BEFORE_CALL_21| 99997)) (<= 1 |#StackHeapBarrier|) (<= v_main_~i~0_BEFORE_CALL_18 (+ 99998 |#StackHeapBarrier|)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_18 |#StackHeapBarrier|)) (<= 6 (+ |v_main_~#a~0.base_BEFORE_CALL_21| v_main_~k~0_BEFORE_CALL_21)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_21|) (<= v_main_~j~0_BEFORE_CALL_17 0) (= |v_main_~#a~0.offset_BEFORE_CALL_21| 0) (<= (+ v_main_~j~0_BEFORE_CALL_17 1) |#StackHeapBarrier|) (<= v_main_~x~0_BEFORE_CALL_15 (+ 2147483647 v_main_~i~0_BEFORE_CALL_18)) (<= v_main_~x~0_BEFORE_CALL_15 2147483647) (<= v_main_~j~0_BEFORE_CALL_17 v_main_~i~0_BEFORE_CALL_18) (<= v_main_~x~0_BEFORE_CALL_15 (+ |#StackHeapBarrier| 2147483646)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_21|) (<= (+ 4 v_main_~j~0_BEFORE_CALL_17) v_main_~k~0_BEFORE_CALL_21) (<= 0 v_main_~i~0_BEFORE_CALL_18) (<= 5 (+ |#StackHeapBarrier| v_main_~k~0_BEFORE_CALL_21)) (<= 4 (+ v_main_~i~0_BEFORE_CALL_18 v_main_~k~0_BEFORE_CALL_21)) (<= (+ v_main_~x~0_BEFORE_CALL_15 v_main_~j~0_BEFORE_CALL_17) 2147483647) (<= (+ 2 v_main_~j~0_BEFORE_CALL_17) |v_main_~#a~0.base_BEFORE_CALL_21|) (<= v_main_~i~0_BEFORE_CALL_18 (+ 99995 v_main_~k~0_BEFORE_CALL_21)) (<= v_main_~x~0_BEFORE_CALL_15 (+ 2147483643 v_main_~k~0_BEFORE_CALL_21)) (<= 3 (+ |v_main_~#a~0.base_BEFORE_CALL_21| |#StackHeapBarrier|)) (= |#NULL.offset| 0) (<= v_main_~i~0_BEFORE_CALL_18 99999) (<= v_main_~x~0_BEFORE_CALL_15 (+ 2147483645 |v_main_~#a~0.base_BEFORE_CALL_21|)) (<= (+ v_main_~i~0_BEFORE_CALL_18 v_main_~x~0_BEFORE_CALL_15) 2147583646) (<= (+ v_main_~i~0_BEFORE_CALL_18 v_main_~j~0_BEFORE_CALL_17) 99999) (= |#NULL.base| 0) (= 100000 ~N~0)) (and (<= 0 (+ v_main_~i~0_BEFORE_CALL_18 v_main_~x~0_BEFORE_CALL_15 2147483648)) (<= 2 (+ v_main_~i~0_BEFORE_CALL_18 |v_main_~#a~0.base_BEFORE_CALL_21|)) (<= 4 v_main_~k~0_BEFORE_CALL_21) (<= v_main_~i~0_BEFORE_CALL_18 (+ |v_main_~#a~0.base_BEFORE_CALL_21| 99997)) (<= 1 |#StackHeapBarrier|) (<= v_main_~i~0_BEFORE_CALL_18 (+ 99998 |#StackHeapBarrier|)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_18 |#StackHeapBarrier|)) (<= 6 (+ |v_main_~#a~0.base_BEFORE_CALL_21| v_main_~k~0_BEFORE_CALL_21)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_21|) (<= v_main_~j~0_BEFORE_CALL_17 0) (= |v_main_~#a~0.offset_BEFORE_CALL_21| 0) (<= 0 (+ v_main_~x~0_BEFORE_CALL_15 2147483648)) (<= (+ v_main_~j~0_BEFORE_CALL_17 1) |#StackHeapBarrier|) (<= v_main_~j~0_BEFORE_CALL_17 (+ v_main_~x~0_BEFORE_CALL_15 2147483648)) (<= v_main_~j~0_BEFORE_CALL_17 v_main_~i~0_BEFORE_CALL_18) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_21|) (<= (+ 4 v_main_~j~0_BEFORE_CALL_17) v_main_~k~0_BEFORE_CALL_21) (<= 0 v_main_~i~0_BEFORE_CALL_18) (<= 5 (+ |#StackHeapBarrier| v_main_~k~0_BEFORE_CALL_21)) (<= 4 (+ v_main_~i~0_BEFORE_CALL_18 v_main_~k~0_BEFORE_CALL_21)) (<= v_main_~i~0_BEFORE_CALL_18 (+ v_main_~x~0_BEFORE_CALL_15 2147583647)) (<= 0 (+ |v_main_~#a~0.base_BEFORE_CALL_21| v_main_~x~0_BEFORE_CALL_15 2147483646)) (<= (+ 2 v_main_~j~0_BEFORE_CALL_17) |v_main_~#a~0.base_BEFORE_CALL_21|) (<= v_main_~i~0_BEFORE_CALL_18 (+ 99995 v_main_~k~0_BEFORE_CALL_21)) (<= 3 (+ |v_main_~#a~0.base_BEFORE_CALL_21| |#StackHeapBarrier|)) (= |#NULL.offset| 0) (<= v_main_~i~0_BEFORE_CALL_18 99999) (<= 0 (+ 2147483647 |#StackHeapBarrier| v_main_~x~0_BEFORE_CALL_15)) (<= (+ v_main_~i~0_BEFORE_CALL_18 v_main_~j~0_BEFORE_CALL_17) 99999) (<= 0 (+ 2147483644 v_main_~x~0_BEFORE_CALL_15 v_main_~k~0_BEFORE_CALL_21)) (= |#NULL.base| 0) (= 100000 ~N~0))) (< v_main_~k~0_BEFORE_CALL_21 v_main_~i~0_BEFORE_CALL_18) (< 0 (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_21|) (+ |v_main_~#a~0.offset_BEFORE_CALL_21| (* v_main_~k~0_BEFORE_CALL_21 4)))))))' at error location [2023-04-01 02:58:40,059 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:58:40,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:58:40,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 19] total 47 [2023-04-01 02:58:40,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056957994] [2023-04-01 02:58:40,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:58:40,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-04-01 02:58:40,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:58:40,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-04-01 02:58:40,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=3408, Unknown=2, NotChecked=0, Total=3660 [2023-04-01 02:58:40,061 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 47 states, 43 states have (on average 1.813953488372093) internal successors, (78), 42 states have internal predecessors, (78), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:58:40,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:58:40,733 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2023-04-01 02:58:40,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 02:58:40,733 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 43 states have (on average 1.813953488372093) internal successors, (78), 42 states have internal predecessors, (78), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2023-04-01 02:58:40,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:58:40,733 INFO L225 Difference]: With dead ends: 56 [2023-04-01 02:58:40,733 INFO L226 Difference]: Without dead ends: 54 [2023-04-01 02:58:40,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=432, Invalid=5418, Unknown=2, NotChecked=0, Total=5852 [2023-04-01 02:58:40,735 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:58:40,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 141 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 02:58:40,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-01 02:58:40,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2023-04-01 02:58:40,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 44 states have internal predecessors, (50), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:58:40,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2023-04-01 02:58:40,742 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 34 [2023-04-01 02:58:40,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:58:40,742 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2023-04-01 02:58:40,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 43 states have (on average 1.813953488372093) internal successors, (78), 42 states have internal predecessors, (78), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:58:40,742 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2023-04-01 02:58:40,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 02:58:40,743 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:58:40,743 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:58:40,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 02:58:40,947 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 [2023-04-01 02:58:40,948 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:58:40,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:58:40,948 INFO L85 PathProgramCache]: Analyzing trace with hash -668583179, now seen corresponding path program 3 times [2023-04-01 02:58:40,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:58:40,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932451370] [2023-04-01 02:58:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:40,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:58:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 7 proven. 60 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 02:58:41,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:58:41,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932451370] [2023-04-01 02:58:41,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932451370] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:58:41,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737837274] [2023-04-01 02:58:41,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:58:41,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:58:41,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:58:41,241 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) [2023-04-01 02:58:41,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 02:58:41,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:58:41,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:58:41,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-01 02:58:41,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:58:41,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-04-01 02:58:41,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2023-04-01 02:58:41,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2023-04-01 02:58:45,834 WARN L861 $PredicateComparison]: unable to prove that (exists ((|v_main_~#a~0.offset_BEFORE_CALL_24| Int) (v_main_~i~0_120 Int) (|v_main_~#a~0.base_BEFORE_CALL_24| Int)) (and (<= v_main_~i~0_120 6) (let ((.cse0 (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_24|)) (.cse1 (* 4 v_main_~i~0_120))) (<= (+ (* 2 v_main_~i~0_120) (select .cse0 (+ .cse1 |v_main_~#a~0.offset_BEFORE_CALL_24|))) (+ 3 (select .cse0 (+ .cse1 |v_main_~#a~0.offset_BEFORE_CALL_24| (- 8)))))))) is different from true [2023-04-01 02:59:18,692 INFO L321 Elim1Store]: treesize reduction 154, result has 49.5 percent of original size [2023-04-01 02:59:18,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 88 treesize of output 178 [2023-04-01 02:59:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-04-01 02:59:21,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:59:30,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2023-04-01 02:59:30,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:59:30,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1331 treesize of output 1263 [2023-04-01 02:59:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 3 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:59:30,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737837274] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:59:30,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1676327719] [2023-04-01 02:59:30,576 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 02:59:30,576 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:59:30,576 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:59:30,576 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:59:30,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:59:30,588 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:59:30,948 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 114 for LOIs [2023-04-01 02:59:31,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:59:31,076 INFO L180 IcfgInterpreter]: Interpretation finished