/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-examples/standard_copy3_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 13:58:26,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 13:58:26,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 13:58:26,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 13:58:26,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 13:58:26,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 13:58:26,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 13:58:26,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 13:58:26,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 13:58:26,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 13:58:26,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 13:58:26,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 13:58:26,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 13:58:26,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 13:58:26,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 13:58:26,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 13:58:26,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 13:58:26,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 13:58:26,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 13:58:26,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 13:58:26,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 13:58:26,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 13:58:26,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 13:58:26,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 13:58:26,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 13:58:26,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 13:58:26,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 13:58:26,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 13:58:26,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 13:58:26,187 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 13:58:26,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 13:58:26,188 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 13:58:26,188 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 13:58:26,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 13:58:26,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 13:58:26,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 13:58:26,191 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 13:58:26,214 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 13:58:26,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 13:58:26,215 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 13:58:26,215 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 13:58:26,216 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 13:58:26,216 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 13:58:26,216 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 13:58:26,222 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 13:58:26,223 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 13:58:26,223 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 13:58:26,223 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 13:58:26,223 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 13:58:26,223 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 13:58:26,223 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 13:58:26,224 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 13:58:26,224 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 13:58:26,224 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 13:58:26,224 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 13:58:26,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 13:58:26,225 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 13:58:26,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 13:58:26,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 13:58:26,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 13:58:26,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 13:58:26,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 13:58:26,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 13:58:26,226 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 13:58:26,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 13:58:26,226 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 13:58:26,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 13:58:26,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 13:58:26,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 13:58:26,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 13:58:26,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 13:58:26,227 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 13:58:26,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 13:58:26,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 13:58:26,227 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 13:58:26,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 13:58:26,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 13:58:26,227 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 13:58:26,227 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 13:58:26,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 13:58:26,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 13:58:26,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 13:58:26,442 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 13:58:26,442 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 13:58:26,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy3_ground-2.i [2023-04-02 13:58:27,613 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 13:58:27,794 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 13:58:27,794 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy3_ground-2.i [2023-04-02 13:58:27,800 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/936146602/4cc76403caac47f99f278b575d60ea3b/FLAGf9c56997f [2023-04-02 13:58:27,813 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/936146602/4cc76403caac47f99f278b575d60ea3b [2023-04-02 13:58:27,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 13:58:27,817 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 13:58:27,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 13:58:27,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 13:58:27,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 13:58:27,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:58:27" (1/1) ... [2023-04-02 13:58:27,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51509420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:27, skipping insertion in model container [2023-04-02 13:58:27,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:58:27" (1/1) ... [2023-04-02 13:58:27,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 13:58:27,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 13:58:27,965 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy3_ground-2.i[816,829] [2023-04-02 13:58:27,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 13:58:27,999 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 13:58:28,014 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy3_ground-2.i[816,829] [2023-04-02 13:58:28,033 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 13:58:28,047 INFO L208 MainTranslator]: Completed translation [2023-04-02 13:58:28,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:28 WrapperNode [2023-04-02 13:58:28,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 13:58:28,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 13:58:28,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 13:58:28,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 13:58:28,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:28" (1/1) ... [2023-04-02 13:58:28,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:28" (1/1) ... [2023-04-02 13:58:28,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:28" (1/1) ... [2023-04-02 13:58:28,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:28" (1/1) ... [2023-04-02 13:58:28,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:28" (1/1) ... [2023-04-02 13:58:28,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:28" (1/1) ... [2023-04-02 13:58:28,103 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:28" (1/1) ... [2023-04-02 13:58:28,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:28" (1/1) ... [2023-04-02 13:58:28,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 13:58:28,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 13:58:28,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 13:58:28,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 13:58:28,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:28" (1/1) ... [2023-04-02 13:58:28,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 13:58:28,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:28,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 13:58:28,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 13:58:28,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 13:58:28,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 13:58:28,184 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 13:58:28,186 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 13:58:28,186 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 13:58:28,186 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 13:58:28,186 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 13:58:28,186 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 13:58:28,186 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 13:58:28,186 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 13:58:28,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 13:58:28,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 13:58:28,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 13:58:28,187 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 13:58:28,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 13:58:28,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 13:58:28,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 13:58:28,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 13:58:28,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 13:58:28,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 13:58:28,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 13:58:28,255 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 13:58:28,257 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 13:58:28,424 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 13:58:28,480 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 13:58:28,480 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-02 13:58:28,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:58:28 BoogieIcfgContainer [2023-04-02 13:58:28,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 13:58:28,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 13:58:28,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 13:58:28,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 13:58:28,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:58:27" (1/3) ... [2023-04-02 13:58:28,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c130f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:58:28, skipping insertion in model container [2023-04-02 13:58:28,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:28" (2/3) ... [2023-04-02 13:58:28,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c130f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:58:28, skipping insertion in model container [2023-04-02 13:58:28,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:58:28" (3/3) ... [2023-04-02 13:58:28,509 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-2.i [2023-04-02 13:58:28,526 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 13:58:28,526 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 13:58:28,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 13:58:28,579 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;@4db68c3f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 13:58:28,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 13:58:28,582 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 13:58:28,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 13:58:28,588 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:28,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:28,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:28,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:28,593 INFO L85 PathProgramCache]: Analyzing trace with hash 851119309, now seen corresponding path program 1 times [2023-04-02 13:58:28,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:28,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180122128] [2023-04-02 13:58:28,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:28,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 13:58:28,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:28,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180122128] [2023-04-02 13:58:28,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180122128] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:58:28,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 13:58:28,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 13:58:28,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427170332] [2023-04-02 13:58:28,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:58:28,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 13:58:28,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:28,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 13:58:28,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:58:28,927 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:28,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:28,970 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2023-04-02 13:58:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 13:58:28,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-02 13:58:28,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:28,982 INFO L225 Difference]: With dead ends: 37 [2023-04-02 13:58:28,982 INFO L226 Difference]: Without dead ends: 19 [2023-04-02 13:58:28,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:58:28,987 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:28,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:58:29,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-02 13:58:29,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-02 13:58:29,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:29,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-04-02 13:58:29,025 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2023-04-02 13:58:29,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:29,026 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-04-02 13:58:29,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:29,027 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-04-02 13:58:29,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 13:58:29,028 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:29,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:29,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 13:58:29,029 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:29,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:29,031 INFO L85 PathProgramCache]: Analyzing trace with hash -902853222, now seen corresponding path program 1 times [2023-04-02 13:58:29,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:29,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650471461] [2023-04-02 13:58:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:29,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:58:29,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:29,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650471461] [2023-04-02 13:58:29,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650471461] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:58:29,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 13:58:29,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 13:58:29,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319972239] [2023-04-02 13:58:29,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:58:29,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 13:58:29,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:29,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 13:58:29,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:58:29,167 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:29,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:29,204 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2023-04-02 13:58:29,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 13:58:29,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 15 [2023-04-02 13:58:29,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:29,206 INFO L225 Difference]: With dead ends: 33 [2023-04-02 13:58:29,206 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 13:58:29,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:58:29,207 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:29,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:58:29,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 13:58:29,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-02 13:58:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-04-02 13:58:29,214 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2023-04-02 13:58:29,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:29,214 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-04-02 13:58:29,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-04-02 13:58:29,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 13:58:29,215 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:29,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:29,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 13:58:29,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:29,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:29,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1927158871, now seen corresponding path program 1 times [2023-04-02 13:58:29,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:29,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909609592] [2023-04-02 13:58:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:29,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 13:58:29,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:29,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909609592] [2023-04-02 13:58:29,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909609592] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:29,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139663360] [2023-04-02 13:58:29,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:29,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:29,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:29,321 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:58:29,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 13:58:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:29,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 13:58:29,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 13:58:29,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:29,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 13:58:29,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139663360] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:29,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [484525725] [2023-04-02 13:58:29,502 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:58:29,503 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:29,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:29,511 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:29,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:29,620 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:30,438 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:30,473 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:30,478 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:31,225 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '318#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_1| Int) (|v_main_~#a4~0.base_BEFORE_CALL_1| Int)) (and (<= 4 (+ |v_main_~#a4~0.base_BEFORE_CALL_1| |v_main_~#a1~0.base_BEFORE_CALL_1|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_1|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_1|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a4~0.base_BEFORE_CALL_1|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_1|) (<= 2 |v_main_~#a4~0.base_BEFORE_CALL_1|) (<= 3 (+ |v_main_~#a4~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (not (= (select (select |#memory_int| |v_main_~#a4~0.base_BEFORE_CALL_1|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_1|) 0))))) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:31,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:31,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:31,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 13:58:31,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395049240] [2023-04-02 13:58:31,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:31,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 13:58:31,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:31,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 13:58:31,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 13:58:31,230 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:31,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:31,283 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-04-02 13:58:31,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 13:58:31,284 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-02 13:58:31,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:31,286 INFO L225 Difference]: With dead ends: 40 [2023-04-02 13:58:31,286 INFO L226 Difference]: Without dead ends: 25 [2023-04-02 13:58:31,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 13:58:31,290 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:31,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:58:31,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-02 13:58:31,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-02 13:58:31,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2023-04-02 13:58:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-02 13:58:31,301 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2023-04-02 13:58:31,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:31,302 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-02 13:58:31,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-02 13:58:31,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 13:58:31,304 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:31,304 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:31,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 13:58:31,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:31,513 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:31,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:31,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1392879356, now seen corresponding path program 2 times [2023-04-02 13:58:31,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:31,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737629092] [2023-04-02 13:58:31,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:31,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 13:58:31,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:31,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737629092] [2023-04-02 13:58:31,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737629092] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:31,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965696304] [2023-04-02 13:58:31,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:58:31,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:31,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:31,674 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:58:31,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 13:58:31,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 13:58:31,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:58:31,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 13:58:31,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:31,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 13:58:31,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 13:58:31,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965696304] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:31,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1628534606] [2023-04-02 13:58:31,802 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:58:31,803 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:31,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:31,804 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:31,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:31,835 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:32,282 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:32,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:32,305 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:32,953 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '569#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_2| Int) (|v_main_~#a4~0.base_BEFORE_CALL_2| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_2|)) (<= 4 (+ |v_main_~#a4~0.base_BEFORE_CALL_2| |v_main_~#a1~0.base_BEFORE_CALL_2|)) (<= 2 |v_main_~#a4~0.base_BEFORE_CALL_2|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a4~0.base_BEFORE_CALL_2|) (<= 3 (+ |v_main_~#a4~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_2|) 0) (select (select |#memory_int| |v_main_~#a4~0.base_BEFORE_CALL_2|) 0))) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_2|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_2|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:32,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:32,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:32,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 13:58:32,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655309830] [2023-04-02 13:58:32,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:32,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 13:58:32,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:32,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 13:58:32,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 13:58:32,956 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:33,013 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2023-04-02 13:58:33,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 13:58:33,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 21 [2023-04-02 13:58:33,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:33,016 INFO L225 Difference]: With dead ends: 47 [2023-04-02 13:58:33,016 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 13:58:33,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 13:58:33,017 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:33,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:58:33,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 13:58:33,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-02 13:58:33,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:33,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-04-02 13:58:33,022 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 21 [2023-04-02 13:58:33,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:33,022 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-04-02 13:58:33,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:33,022 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-04-02 13:58:33,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-02 13:58:33,023 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:33,023 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:33,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 13:58:33,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-02 13:58:33,232 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:33,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:33,233 INFO L85 PathProgramCache]: Analyzing trace with hash 30531789, now seen corresponding path program 3 times [2023-04-02 13:58:33,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:33,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904641983] [2023-04-02 13:58:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:33,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 13:58:33,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:33,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904641983] [2023-04-02 13:58:33,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904641983] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:33,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514645938] [2023-04-02 13:58:33,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:58:33,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:33,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:33,393 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:58:33,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 13:58:33,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:58:33,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:58:33,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 13:58:33,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 13:58:33,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 13:58:33,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514645938] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:33,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [280883263] [2023-04-02 13:58:33,570 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:58:33,571 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:33,571 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:33,571 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:33,571 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:33,587 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:33,964 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:33,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:33,984 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:34,598 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '912#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_3| Int) (|v_main_~#a4~0.base_BEFORE_CALL_3| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a4~0.base_BEFORE_CALL_3|) (<= 3 (+ |v_main_~#a4~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_3|)) (<= 2 |v_main_~#a4~0.base_BEFORE_CALL_3|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_3|) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_3|) 0) (select (select |#memory_int| |v_main_~#a4~0.base_BEFORE_CALL_3|) 0))) (<= 4 (+ |v_main_~#a4~0.base_BEFORE_CALL_3| |v_main_~#a1~0.base_BEFORE_CALL_3|)) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_3|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:34,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:34,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:34,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 13:58:34,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143409966] [2023-04-02 13:58:34,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:34,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 13:58:34,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:34,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 13:58:34,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-04-02 13:58:34,600 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:34,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:34,644 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2023-04-02 13:58:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 13:58:34,644 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-04-02 13:58:34,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:34,645 INFO L225 Difference]: With dead ends: 64 [2023-04-02 13:58:34,645 INFO L226 Difference]: Without dead ends: 40 [2023-04-02 13:58:34,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-04-02 13:58:34,646 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:34,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:58:34,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-02 13:58:34,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-04-02 13:58:34,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2023-04-02 13:58:34,652 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 30 [2023-04-02 13:58:34,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:34,652 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2023-04-02 13:58:34,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:34,652 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2023-04-02 13:58:34,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-02 13:58:34,653 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:34,653 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:34,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 13:58:34,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:34,860 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:34,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:34,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1073132973, now seen corresponding path program 4 times [2023-04-02 13:58:34,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:34,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102406892] [2023-04-02 13:58:34,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:34,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 13:58:35,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:35,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102406892] [2023-04-02 13:58:35,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102406892] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:35,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468255298] [2023-04-02 13:58:35,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:58:35,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:35,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:35,191 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:58:35,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 13:58:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:35,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 13:58:35,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 13:58:35,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 13:58:35,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468255298] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:35,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2127039528] [2023-04-02 13:58:35,565 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:58:35,565 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:35,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:35,565 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:35,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:35,595 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:35,956 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:35,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:35,979 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:36,607 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1349#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_4| Int) (|v_main_~#a4~0.base_BEFORE_CALL_4| Int)) (and (<= 2 |v_main_~#a4~0.base_BEFORE_CALL_4|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_4|)) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_4|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a4~0.base_BEFORE_CALL_4|) (not (= (select (select |#memory_int| |v_main_~#a4~0.base_BEFORE_CALL_4|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_4|) 0))) (<= 3 (+ |v_main_~#a4~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_4|) (<= 4 (+ |v_main_~#a4~0.base_BEFORE_CALL_4| |v_main_~#a1~0.base_BEFORE_CALL_4|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:36,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:36,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:36,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 13:58:36,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014934895] [2023-04-02 13:58:36,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:36,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 13:58:36,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:36,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 13:58:36,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 13:58:36,610 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:36,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:36,660 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2023-04-02 13:58:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 13:58:36,660 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 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 36 [2023-04-02 13:58:36,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:36,661 INFO L225 Difference]: With dead ends: 76 [2023-04-02 13:58:36,661 INFO L226 Difference]: Without dead ends: 52 [2023-04-02 13:58:36,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 13:58:36,663 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:36,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:58:36,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-02 13:58:36,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-04-02 13:58:36,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:36,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2023-04-02 13:58:36,669 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 36 [2023-04-02 13:58:36,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:36,669 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2023-04-02 13:58:36,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:36,670 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2023-04-02 13:58:36,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-02 13:58:36,670 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:36,671 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:36,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 13:58:36,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:36,877 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:36,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:36,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1580406931, now seen corresponding path program 5 times [2023-04-02 13:58:36,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:36,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782471366] [2023-04-02 13:58:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:36,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 13:58:37,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:37,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782471366] [2023-04-02 13:58:37,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782471366] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:37,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760078273] [2023-04-02 13:58:37,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:58:37,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:37,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:37,583 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:58:37,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 13:58:37,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 13:58:37,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:58:37,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 13:58:37,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-04-02 13:58:37,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-04-02 13:58:37,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760078273] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:37,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [867536785] [2023-04-02 13:58:37,925 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:58:37,925 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:37,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:37,925 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:37,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:37,940 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:38,266 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:38,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:38,282 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:39,030 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1916#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a4~0.base_BEFORE_CALL_5| Int) (|v_main_~#a1~0.base_BEFORE_CALL_5| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a4~0.base_BEFORE_CALL_5|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_5|)) (<= 4 (+ |v_main_~#a4~0.base_BEFORE_CALL_5| |v_main_~#a1~0.base_BEFORE_CALL_5|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_5|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_5|) (<= 3 (+ |v_main_~#a4~0.base_BEFORE_CALL_5| |#StackHeapBarrier|)) (not (= (select (select |#memory_int| |v_main_~#a4~0.base_BEFORE_CALL_5|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_5|) 0))) (<= 2 |v_main_~#a4~0.base_BEFORE_CALL_5|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:39,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:39,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:39,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-04-02 13:58:39,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649387392] [2023-04-02 13:58:39,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:39,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-02 13:58:39,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:39,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-02 13:58:39,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=1665, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 13:58:39,033 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:39,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:39,140 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2023-04-02 13:58:39,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-02 13:58:39,141 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 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 48 [2023-04-02 13:58:39,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:39,142 INFO L225 Difference]: With dead ends: 95 [2023-04-02 13:58:39,142 INFO L226 Difference]: Without dead ends: 71 [2023-04-02 13:58:39,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=405, Invalid=1665, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 13:58:39,143 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:39,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:58:39,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-04-02 13:58:39,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-04-02 13:58:39,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:39,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2023-04-02 13:58:39,151 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 48 [2023-04-02 13:58:39,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:39,151 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2023-04-02 13:58:39,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:39,151 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2023-04-02 13:58:39,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-02 13:58:39,153 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:39,153 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:39,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 13:58:39,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:39,359 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:39,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:39,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1637600474, now seen corresponding path program 6 times [2023-04-02 13:58:39,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:39,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029332065] [2023-04-02 13:58:39,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:39,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:40,103 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-02 13:58:40,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:40,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029332065] [2023-04-02 13:58:40,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029332065] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:40,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867221945] [2023-04-02 13:58:40,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:58:40,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:40,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:40,105 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:58:40,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 13:58:40,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:58:40,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:58:40,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 13:58:40,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:40,380 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-02 13:58:40,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-02 13:58:41,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867221945] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:41,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [72878090] [2023-04-02 13:58:41,050 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:58:41,050 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:41,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:41,051 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:41,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:41,071 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:41,379 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:41,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:41,398 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:42,056 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2689#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a4~0.base_BEFORE_CALL_6| Int) (|v_main_~#a1~0.base_BEFORE_CALL_6| Int)) (and (<= 3 (+ |v_main_~#a4~0.base_BEFORE_CALL_6| |#StackHeapBarrier|)) (<= 2 |v_main_~#a4~0.base_BEFORE_CALL_6|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_6|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a4~0.base_BEFORE_CALL_6|) (<= 4 (+ |v_main_~#a4~0.base_BEFORE_CALL_6| |v_main_~#a1~0.base_BEFORE_CALL_6|)) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_6|) 0) (select (select |#memory_int| |v_main_~#a4~0.base_BEFORE_CALL_6|) 0))) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_6|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_6|))) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:42,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:42,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:42,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-04-02 13:58:42,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116902835] [2023-04-02 13:58:42,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:42,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-02 13:58:42,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:42,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-02 13:58:42,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1315, Invalid=2467, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 13:58:42,059 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:42,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:42,146 INFO L93 Difference]: Finished difference Result 138 states and 170 transitions. [2023-04-02 13:58:42,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-02 13:58:42,147 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 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 67 [2023-04-02 13:58:42,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:42,148 INFO L225 Difference]: With dead ends: 138 [2023-04-02 13:58:42,148 INFO L226 Difference]: Without dead ends: 96 [2023-04-02 13:58:42,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1315, Invalid=2467, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 13:58:42,151 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:42,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:58:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-02 13:58:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-04-02 13:58:42,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.0555555555555556) internal successors, (95), 90 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:42,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2023-04-02 13:58:42,172 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 67 [2023-04-02 13:58:42,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:42,172 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2023-04-02 13:58:42,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:42,173 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2023-04-02 13:58:42,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-02 13:58:42,176 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:42,176 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:42,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 13:58:42,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:42,384 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:42,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:42,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1623362131, now seen corresponding path program 7 times [2023-04-02 13:58:42,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:42,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727609432] [2023-04-02 13:58:42,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:42,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-02 13:58:44,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:44,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727609432] [2023-04-02 13:58:44,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727609432] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:44,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90332801] [2023-04-02 13:58:44,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:58:44,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:44,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:44,677 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:58:44,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 13:58:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:45,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 1146 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-02 13:58:45,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-02 13:58:45,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-02 13:58:47,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90332801] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:47,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1298187423] [2023-04-02 13:58:47,573 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:58:47,573 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:47,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:47,573 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:47,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:47,591 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:47,866 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:47,880 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:47,883 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:48,699 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3798#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a4~0.base_BEFORE_CALL_7| Int) (|v_main_~#a1~0.base_BEFORE_CALL_7| Int)) (and (<= 4 (+ |v_main_~#a4~0.base_BEFORE_CALL_7| |v_main_~#a1~0.base_BEFORE_CALL_7|)) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_7|) 0) (select (select |#memory_int| |v_main_~#a4~0.base_BEFORE_CALL_7|) 0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a4~0.base_BEFORE_CALL_7|) (<= 3 (+ |v_main_~#a4~0.base_BEFORE_CALL_7| |#StackHeapBarrier|)) (<= 2 |v_main_~#a4~0.base_BEFORE_CALL_7|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_7|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_7|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_7|)))) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:48,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:48,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:48,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-04-02 13:58:48,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347742644] [2023-04-02 13:58:48,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:48,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-04-02 13:58:48,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:48,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-04-02 13:58:48,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5090, Invalid=7342, Unknown=0, NotChecked=0, Total=12432 [2023-04-02 13:58:48,705 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 101 states have internal predecessors, (113), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:48,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:48,844 INFO L93 Difference]: Finished difference Result 188 states and 245 transitions. [2023-04-02 13:58:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-04-02 13:58:48,844 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 101 states have internal predecessors, (113), 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 92 [2023-04-02 13:58:48,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:48,849 INFO L225 Difference]: With dead ends: 188 [2023-04-02 13:58:48,849 INFO L226 Difference]: Without dead ends: 146 [2023-04-02 13:58:48,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5090, Invalid=7342, Unknown=0, NotChecked=0, Total=12432 [2023-04-02 13:58:48,854 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:48,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:58:48,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-04-02 13:58:48,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2023-04-02 13:58:48,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 140 states have (on average 1.0357142857142858) internal successors, (145), 140 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:48,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2023-04-02 13:58:48,871 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 92 [2023-04-02 13:58:48,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:48,872 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2023-04-02 13:58:48,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 101 states have internal predecessors, (113), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:48,872 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2023-04-02 13:58:48,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-04-02 13:58:48,873 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:48,873 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:48,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 13:58:49,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:49,081 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:49,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:49,082 INFO L85 PathProgramCache]: Analyzing trace with hash 402226765, now seen corresponding path program 8 times [2023-04-02 13:58:49,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:49,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553856502] [2023-04-02 13:58:49,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:49,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-02 13:58:55,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:55,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553856502] [2023-04-02 13:58:55,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553856502] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:55,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452827470] [2023-04-02 13:58:55,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:58:55,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:55,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:55,972 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:58:55,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 13:58:59,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 13:58:59,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:58:59,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 13:58:59,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4961 trivial. 0 not checked. [2023-04-02 13:58:59,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:59:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4961 trivial. 0 not checked. [2023-04-02 13:59:00,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452827470] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:59:00,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [554028058] [2023-04-02 13:59:00,099 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:59:00,099 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:59:00,100 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:59:00,100 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:59:00,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:59:00,118 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:59:00,403 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:59:00,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:59:00,416 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:59:01,655 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5429#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_8| Int) (|v_main_~#a4~0.base_BEFORE_CALL_8| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_8|)) (<= 4 (+ |v_main_~#a4~0.base_BEFORE_CALL_8| |v_main_~#a1~0.base_BEFORE_CALL_8|)) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_8|) (<= 3 (+ |v_main_~#a4~0.base_BEFORE_CALL_8| |#StackHeapBarrier|)) (not (= (select (select |#memory_int| |v_main_~#a4~0.base_BEFORE_CALL_8|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_8|) 0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_8|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a4~0.base_BEFORE_CALL_8|) (<= 2 |v_main_~#a4~0.base_BEFORE_CALL_8|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:59:01,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:59:01,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:59:01,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 13, 13] total 123 [2023-04-02 13:59:01,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736623338] [2023-04-02 13:59:01,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:59:01,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-04-02 13:59:01,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:59:01,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-04-02 13:59:01,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5365, Invalid=12457, Unknown=0, NotChecked=0, Total=17822 [2023-04-02 13:59:01,665 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:59:01,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:59:01,896 INFO L93 Difference]: Finished difference Result 225 states and 269 transitions. [2023-04-02 13:59:01,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-04-02 13:59:01,896 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 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 142 [2023-04-02 13:59:01,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:59:01,897 INFO L225 Difference]: With dead ends: 225 [2023-04-02 13:59:01,897 INFO L226 Difference]: Without dead ends: 183 [2023-04-02 13:59:01,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5365, Invalid=12457, Unknown=0, NotChecked=0, Total=17822 [2023-04-02 13:59:01,901 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 13:59:01,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 13:59:01,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-04-02 13:59:01,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2023-04-02 13:59:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 177 states have (on average 1.0282485875706215) internal successors, (182), 177 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:59:01,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 187 transitions. [2023-04-02 13:59:01,911 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 187 transitions. Word has length 142 [2023-04-02 13:59:01,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:59:01,911 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 187 transitions. [2023-04-02 13:59:01,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:59:01,912 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 187 transitions. [2023-04-02 13:59:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-04-02 13:59:01,914 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:59:01,914 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:59:01,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 13:59:02,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 13:59:02,125 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:59:02,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:59:02,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1984936230, now seen corresponding path program 9 times [2023-04-02 13:59:02,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:59:02,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598296417] [2023-04-02 13:59:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:59:02,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:59:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2023-04-02 13:59:08,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:59:08,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598296417] [2023-04-02 13:59:08,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598296417] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:59:08,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972184592] [2023-04-02 13:59:08,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:59:08,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:08,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:59:08,405 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:59:08,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 13:59:09,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:59:09,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:59:09,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 2265 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-02 13:59:09,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:59:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2023-04-02 13:59:09,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:59:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2023-04-02 13:59:18,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972184592] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:59:18,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [423379828] [2023-04-02 13:59:18,854 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:59:18,855 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:59:18,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:59:18,855 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:59:18,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:59:18,868 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:59:19,122 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:59:19,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:59:19,138 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:59:20,317 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7510#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_9| Int) (|v_main_~#a4~0.base_BEFORE_CALL_9| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_9|)) (<= 4 (+ |v_main_~#a4~0.base_BEFORE_CALL_9| |v_main_~#a1~0.base_BEFORE_CALL_9|)) (<= 2 |v_main_~#a4~0.base_BEFORE_CALL_9|) (<= 3 (+ |v_main_~#a4~0.base_BEFORE_CALL_9| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_9|) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_9|) 0) (select (select |#memory_int| |v_main_~#a4~0.base_BEFORE_CALL_9|) 0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a4~0.base_BEFORE_CALL_9|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_9|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:59:20,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:59:20,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:59:20,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-04-02 13:59:20,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708348415] [2023-04-02 13:59:20,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:59:20,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-04-02 13:59:20,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:59:20,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-04-02 13:59:20,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20543, Invalid=25039, Unknown=0, NotChecked=0, Total=45582 [2023-04-02 13:59:20,328 INFO L87 Difference]: Start difference. First operand 183 states and 187 transitions. Second operand has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 203 states have internal predecessors, (215), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:59:20,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:59:20,738 INFO L93 Difference]: Finished difference Result 362 states and 470 transitions. [2023-04-02 13:59:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-04-02 13:59:20,738 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 203 states have internal predecessors, (215), 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 179 [2023-04-02 13:59:20,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:59:20,740 INFO L225 Difference]: With dead ends: 362 [2023-04-02 13:59:20,740 INFO L226 Difference]: Without dead ends: 284 [2023-04-02 13:59:20,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=20543, Invalid=25039, Unknown=0, NotChecked=0, Total=45582 [2023-04-02 13:59:20,743 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 13:59:20,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 13:59:20,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-04-02 13:59:20,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2023-04-02 13:59:20,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 278 states have (on average 1.0179856115107915) internal successors, (283), 278 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:59:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 288 transitions. [2023-04-02 13:59:20,756 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 288 transitions. Word has length 179 [2023-04-02 13:59:20,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:59:20,756 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 288 transitions. [2023-04-02 13:59:20,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 203 states have internal predecessors, (215), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:59:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 288 transitions. [2023-04-02 13:59:20,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2023-04-02 13:59:20,760 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:59:20,760 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:59:20,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 13:59:20,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:20,969 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:59:20,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:59:20,970 INFO L85 PathProgramCache]: Analyzing trace with hash -87954579, now seen corresponding path program 10 times [2023-04-02 13:59:20,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:59:20,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700315345] [2023-04-02 13:59:20,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:59:20,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:59:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20859 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2023-04-02 13:59:44,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:59:44,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700315345] [2023-04-02 13:59:44,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700315345] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:59:44,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87399599] [2023-04-02 13:59:44,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:59:44,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:44,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:59:44,535 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:59:44,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 13:59:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:45,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 3982 conjuncts, 202 conjunts are in the unsatisfiable core [2023-04-02 13:59:45,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:59:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20859 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2023-04-02 13:59:45,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:00:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 20859 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2023-04-02 14:00:24,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87399599] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:00:24,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1375143091] [2023-04-02 14:00:24,366 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:00:24,366 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:00:24,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:00:24,367 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:00:24,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:00:24,379 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:00:24,613 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:00:24,626 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:00:24,628 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:00:26,574 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10875#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_10| Int) (|v_main_~#a4~0.base_BEFORE_CALL_10| Int)) (and (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_10|) (<= 3 (+ |v_main_~#a1~0.base_BEFORE_CALL_10| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_10|) (<= 3 (+ |v_main_~#a4~0.base_BEFORE_CALL_10| |#StackHeapBarrier|)) (<= 2 |v_main_~#a4~0.base_BEFORE_CALL_10|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a4~0.base_BEFORE_CALL_10|) (<= 4 (+ |v_main_~#a4~0.base_BEFORE_CALL_10| |v_main_~#a1~0.base_BEFORE_CALL_10|)) (not (= (select (select |#memory_int| |v_main_~#a4~0.base_BEFORE_CALL_10|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_10|) 0))))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:00:26,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:00:26,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:00:26,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2023-04-02 14:00:26,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969495572] [2023-04-02 14:00:26,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:00:26,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2023-04-02 14:00:26,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:00:26,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2023-04-02 14:00:26,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81850, Invalid=90790, Unknown=0, NotChecked=0, Total=172640 [2023-04-02 14:00:26,595 INFO L87 Difference]: Start difference. First operand 284 states and 288 transitions. Second operand has 405 states, 405 states have (on average 1.0296296296296297) internal successors, (417), 405 states have internal predecessors, (417), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:00:28,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:00:28,173 INFO L93 Difference]: Finished difference Result 564 states and 773 transitions. [2023-04-02 14:00:28,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2023-04-02 14:00:28,173 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0296296296296297) internal successors, (417), 405 states have internal predecessors, (417), 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 280 [2023-04-02 14:00:28,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:00:28,176 INFO L225 Difference]: With dead ends: 564 [2023-04-02 14:00:28,176 INFO L226 Difference]: Without dead ends: 486 [2023-04-02 14:00:28,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 628 SyntacticMatches, 0 SemanticMatches, 414 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7446 ImplicationChecksByTransitivity, 53.0s TimeCoverageRelationStatistics Valid=81850, Invalid=90790, Unknown=0, NotChecked=0, Total=172640 [2023-04-02 14:00:28,183 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 14:00:28,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 133 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 14:00:28,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2023-04-02 14:00:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 486. [2023-04-02 14:00:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 480 states have (on average 1.0104166666666667) internal successors, (485), 480 states have internal predecessors, (485), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:00:28,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 490 transitions. [2023-04-02 14:00:28,201 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 490 transitions. Word has length 280 [2023-04-02 14:00:28,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:00:28,202 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 490 transitions. [2023-04-02 14:00:28,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0296296296296297) internal successors, (417), 405 states have internal predecessors, (417), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:00:28,202 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 490 transitions. [2023-04-02 14:00:28,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2023-04-02 14:00:28,209 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:00:28,209 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:00:28,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 14:00:28,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 14:00:28,424 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:00:28,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:00:28,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1366085517, now seen corresponding path program 11 times [2023-04-02 14:00:28,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:00:28,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486066120] [2023-04-02 14:00:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:00:28,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:00:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:02:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 81762 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2023-04-02 14:02:04,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:02:04,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486066120] [2023-04-02 14:02:04,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486066120] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:02:04,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366558323] [2023-04-02 14:02:04,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:02:04,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:02:04,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:02:04,873 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:02:04,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process