/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 IntervalDomain -i ../sv-benchmarks/c/array-examples/standard_reverse_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:39:41,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:39:41,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:39:41,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:39:41,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:39:41,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:39:41,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:39:41,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:39:41,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:39:41,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:39:41,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:39:41,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:39:41,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:39:41,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:39:41,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:39:41,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:39:41,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:39:41,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:39:41,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:39:41,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:39:41,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:39:41,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:39:41,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:39:41,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:39:41,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 20:39:41,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:39:41,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:39:41,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:39:41,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:39:41,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:39:41,157 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:39:41,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:39:41,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:39:41,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:39:41,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:39:41,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:39:41,159 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 [2023-03-31 20:39:41,173 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:39:41,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:39:41,173 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:39:41,173 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:39:41,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:39:41,174 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:39:41,174 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:39:41,174 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:39:41,174 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:39:41,174 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:39:41,175 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:39:41,175 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:39:41,175 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:39:41,175 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:39:41,175 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:39:41,175 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:39:41,175 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:39:41,176 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:39:41,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:39:41,176 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:39:41,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:39:41,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:39:41,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:39:41,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:39:41,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:39:41,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:39:41,181 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:39:41,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:39:41,182 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:39:41,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:39:41,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:39:41,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:39:41,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:39:41,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:39:41,182 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:39:41,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:39:41,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:39:41,183 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:39:41,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:39:41,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:39:41,183 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:39:41,183 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:39:41,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:39:41,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:39:41,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:39:41,397 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:39:41,397 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:39:41,398 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_reverse_ground.i [2023-03-31 20:39:42,539 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:39:42,712 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:39:42,712 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_reverse_ground.i [2023-03-31 20:39:42,717 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6b737bf2/7d1e182447aa445d94db9f32d8be254e/FLAG2a59abc7b [2023-03-31 20:39:42,731 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6b737bf2/7d1e182447aa445d94db9f32d8be254e [2023-03-31 20:39:42,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:39:42,737 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:39:42,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:39:42,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:39:42,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:39:42,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:39:42" (1/1) ... [2023-03-31 20:39:42,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66e04dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:39:42, skipping insertion in model container [2023-03-31 20:39:42,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:39:42" (1/1) ... [2023-03-31 20:39:42,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:39:42,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:39:42,864 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_reverse_ground.i[816,829] [2023-03-31 20:39:42,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:39:42,880 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:39:42,888 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_reverse_ground.i[816,829] [2023-03-31 20:39:42,892 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:39:42,901 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:39:42,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:39:42 WrapperNode [2023-03-31 20:39:42,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:39:42,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:39:42,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:39:42,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:39:42,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:39:42" (1/1) ... [2023-03-31 20:39:42,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:39:42" (1/1) ... [2023-03-31 20:39:42,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:39:42" (1/1) ... [2023-03-31 20:39:42,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:39:42" (1/1) ... [2023-03-31 20:39:42,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:39:42" (1/1) ... [2023-03-31 20:39:42,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:39:42" (1/1) ... [2023-03-31 20:39:42,938 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:39:42" (1/1) ... [2023-03-31 20:39:42,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:39:42" (1/1) ... [2023-03-31 20:39:42,940 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:39:42,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:39:42,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:39:42,941 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:39:42,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:39:42" (1/1) ... [2023-03-31 20:39:42,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:39:42,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:39:42,966 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) [2023-03-31 20:39:42,968 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 [2023-03-31 20:39:42,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:39:42,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:39:42,995 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:39:42,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 20:39:42,995 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:39:42,995 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:39:42,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:39:42,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 20:39:42,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 20:39:42,995 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:39:42,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:39:42,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 20:39:42,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 20:39:42,996 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:39:42,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:39:42,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:39:42,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:39:42,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:39:42,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:39:42,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:39:42,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:39:43,102 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:39:43,103 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:39:43,218 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:39:43,274 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:39:43,275 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-31 20:39:43,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:39:43 BoogieIcfgContainer [2023-03-31 20:39:43,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:39:43,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:39:43,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:39:43,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:39:43,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:39:42" (1/3) ... [2023-03-31 20:39:43,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64450184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:39:43, skipping insertion in model container [2023-03-31 20:39:43,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:39:42" (2/3) ... [2023-03-31 20:39:43,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64450184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:39:43, skipping insertion in model container [2023-03-31 20:39:43,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:39:43" (3/3) ... [2023-03-31 20:39:43,282 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.i [2023-03-31 20:39:43,306 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:39:43,307 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:39:43,350 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:39:43,355 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;@3f0964d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:39:43,356 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:39:43,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2023-03-31 20:39:43,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-03-31 20:39:43,363 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:39:43,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:39:43,364 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:39:43,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:39:43,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1571004043, now seen corresponding path program 1 times [2023-03-31 20:39:43,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:39:43,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927772551] [2023-03-31 20:39:43,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:39:43,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:39:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:39:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:39:43,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:39:43,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927772551] [2023-03-31 20:39:43,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927772551] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:39:43,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:39:43,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 20:39:43,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488636977] [2023-03-31 20:39:43,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:39:43,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:39:43,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:39:43,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:39:43,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:39:43,585 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-03-31 20:39:43,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:39:43,613 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2023-03-31 20:39:43,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:39:43,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2023-03-31 20:39:43,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:39:43,619 INFO L225 Difference]: With dead ends: 34 [2023-03-31 20:39:43,619 INFO L226 Difference]: Without dead ends: 18 [2023-03-31 20:39:43,621 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 [2023-03-31 20:39:43,624 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:39:43,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:39:43,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-03-31 20:39:43,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-03-31 20:39:43,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:39:43,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-03-31 20:39:43,647 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2023-03-31 20:39:43,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:39:43,648 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-03-31 20:39:43,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-03-31 20:39:43,648 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-03-31 20:39:43,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 20:39:43,649 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:39:43,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:39:43,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 20:39:43,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:39:43,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:39:43,650 INFO L85 PathProgramCache]: Analyzing trace with hash -699167912, now seen corresponding path program 1 times [2023-03-31 20:39:43,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:39:43,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140745341] [2023-03-31 20:39:43,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:39:43,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:39:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:39:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 20:39:43,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:39:43,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140745341] [2023-03-31 20:39:43,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140745341] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:39:43,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491236133] [2023-03-31 20:39:43,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:39:43,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:39:43,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:39:43,736 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) [2023-03-31 20:39:43,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 20:39:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:39:43,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:39:43,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:39:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 20:39:43,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:39:43,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 20:39:43,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491236133] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:39:43,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [6065288] [2023-03-31 20:39:43,883 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-03-31 20:39:43,883 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:39:43,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:39:43,889 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:39:43,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:39:44,009 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:39:44,118 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2023-03-31 20:39:44,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:39:44,146 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:39:44,341 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '191#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (exists ((|v_main_~#b~0.base_BEFORE_CALL_1| Int) (|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (and (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) 0) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_1|) 399996))) (<= 0 |v_main_~#a~0.base_BEFORE_CALL_1|) (<= 0 |v_main_~#b~0.base_BEFORE_CALL_1|))) (= |#NULL.base| 0))' at error location [2023-03-31 20:39:44,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:39:44,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:39:44,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-03-31 20:39:44,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642897590] [2023-03-31 20:39:44,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:39:44,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 20:39:44,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:39:44,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 20:39:44,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-03-31 20:39:44,345 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2023-03-31 20:39:44,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:39:44,374 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-03-31 20:39:44,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 20:39:44,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 [2023-03-31 20:39:44,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:39:44,375 INFO L225 Difference]: With dead ends: 35 [2023-03-31 20:39:44,375 INFO L226 Difference]: Without dead ends: 24 [2023-03-31 20:39:44,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-03-31 20:39:44,376 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:39:44,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:39:44,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-03-31 20:39:44,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-03-31 20:39:44,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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) [2023-03-31 20:39:44,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-03-31 20:39:44,380 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2023-03-31 20:39:44,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:39:44,380 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-03-31 20:39:44,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2023-03-31 20:39:44,380 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-03-31 20:39:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-31 20:39:44,381 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:39:44,381 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:39:44,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 20:39:44,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:39:44,586 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:39:44,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:39:44,587 INFO L85 PathProgramCache]: Analyzing trace with hash -837488693, now seen corresponding path program 2 times [2023-03-31 20:39:44,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:39:44,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070027019] [2023-03-31 20:39:44,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:39:44,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:39:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:39:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:39:44,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:39:44,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070027019] [2023-03-31 20:39:44,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070027019] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:39:44,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313498993] [2023-03-31 20:39:44,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:39:44,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:39:44,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:39:44,759 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) [2023-03-31 20:39:44,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 20:39:44,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 20:39:44,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:39:44,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 27 conjunts are in the unsatisfiable core [2023-03-31 20:39:44,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:39:44,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-03-31 20:39:44,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2023-03-31 20:39:45,008 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 20:39:45,014 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-03-31 20:39:45,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 13 [2023-03-31 20:39:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 20:39:45,051 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:39:45,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313498993] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:39:45,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 20:39:45,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2023-03-31 20:39:45,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026462137] [2023-03-31 20:39:45,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:39:45,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 20:39:45,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:39:45,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 20:39:45,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-03-31 20:39:45,056 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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) [2023-03-31 20:39:45,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:39:45,170 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-03-31 20:39:45,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 20:39:45,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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 20 [2023-03-31 20:39:45,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:39:45,172 INFO L225 Difference]: With dead ends: 33 [2023-03-31 20:39:45,172 INFO L226 Difference]: Without dead ends: 31 [2023-03-31 20:39:45,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-03-31 20:39:45,175 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:39:45,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 48 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:39:45,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-31 20:39:45,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-03-31 20:39:45,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:39:45,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-03-31 20:39:45,194 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 20 [2023-03-31 20:39:45,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:39:45,194 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-03-31 20:39:45,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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) [2023-03-31 20:39:45,194 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-03-31 20:39:45,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 20:39:45,195 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:39:45,196 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:39:45,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 20:39:45,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-03-31 20:39:45,409 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:39:45,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:39:45,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1941800401, now seen corresponding path program 1 times [2023-03-31 20:39:45,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:39:45,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302302942] [2023-03-31 20:39:45,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:39:45,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:39:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:39:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 20:39:45,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:39:45,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302302942] [2023-03-31 20:39:45,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302302942] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:39:45,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146338891] [2023-03-31 20:39:45,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:39:45,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:39:45,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:39:45,552 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) [2023-03-31 20:39:45,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 20:39:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:39:45,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 20:39:45,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:39:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 20:39:45,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:39:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 20:39:45,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146338891] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:39:45,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [772775034] [2023-03-31 20:39:45,724 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:39:45,727 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:39:45,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:39:45,729 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:39:45,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:39:45,758 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:39:45,900 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2023-03-31 20:39:45,916 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:39:45,919 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:39:46,158 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '650#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~x~0_BEFORE_CALL_6 Int) (|v_main_~#a~0.base_BEFORE_CALL_6| Int) (|v_main_~#b~0.base_BEFORE_CALL_6| Int)) (and (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_6|) (+ (* v_main_~x~0_BEFORE_CALL_6 (- 4)) 399996)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_6|) (* v_main_~x~0_BEFORE_CALL_6 4)))) (<= 0 |v_main_~#a~0.base_BEFORE_CALL_6|) (<= 0 |v_main_~#b~0.base_BEFORE_CALL_6|) (<= 0 v_main_~x~0_BEFORE_CALL_6) (< v_main_~x~0_BEFORE_CALL_6 100000))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:39:46,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:39:46,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:39:46,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-03-31 20:39:46,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571039267] [2023-03-31 20:39:46,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:39:46,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 20:39:46,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:39:46,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 20:39:46,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2023-03-31 20:39:46,160 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 20:39:46,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:39:46,207 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2023-03-31 20:39:46,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 20:39:46,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-03-31 20:39:46,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:39:46,209 INFO L225 Difference]: With dead ends: 62 [2023-03-31 20:39:46,209 INFO L226 Difference]: Without dead ends: 42 [2023-03-31 20:39:46,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2023-03-31 20:39:46,210 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:39:46,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:39:46,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-03-31 20:39:46,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-03-31 20:39:46,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:39:46,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2023-03-31 20:39:46,217 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 27 [2023-03-31 20:39:46,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:39:46,217 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2023-03-31 20:39:46,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 20:39:46,217 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2023-03-31 20:39:46,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-03-31 20:39:46,218 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:39:46,218 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:39:46,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-31 20:39:46,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:39:46,426 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:39:46,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:39:46,426 INFO L85 PathProgramCache]: Analyzing trace with hash -492127247, now seen corresponding path program 2 times [2023-03-31 20:39:46,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:39:46,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090071517] [2023-03-31 20:39:46,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:39:46,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:39:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:39:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-03-31 20:39:46,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:39:46,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090071517] [2023-03-31 20:39:46,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090071517] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:39:46,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712765214] [2023-03-31 20:39:46,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:39:46,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:39:46,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:39:46,580 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) [2023-03-31 20:39:46,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 20:39:46,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 20:39:46,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:39:46,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 38 conjunts are in the unsatisfiable core [2023-03-31 20:39:46,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:39:46,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-03-31 20:39:46,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2023-03-31 20:39:46,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2023-03-31 20:39:48,842 WARN L861 $PredicateComparison]: unable to prove that (exists ((|v_main_~#a~0.base_BEFORE_CALL_9| Int) (v_main_~i~0_57 Int) (|v_main_~#b~0.base_BEFORE_CALL_9| Int) (|v_main_~#b~0.offset_BEFORE_CALL_9| Int)) (and (= (select (select |c_#memory_int| |v_main_~#b~0.base_BEFORE_CALL_9|) (+ |v_main_~#b~0.offset_BEFORE_CALL_9| (* v_main_~i~0_57 4) (- 4))) (select (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_9|) (+ 400000 (* v_main_~i~0_57 (- 4))))) (not (= |v_main_~#b~0.base_BEFORE_CALL_9| |v_main_~#a~0.base_BEFORE_CALL_9|)) (<= 99999 v_main_~i~0_57) (< v_main_~i~0_57 100000))) is different from true [2023-03-31 20:39:53,006 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 20:39:53,010 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-03-31 20:39:53,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 13 [2023-03-31 20:39:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 91 trivial. 1 not checked. [2023-03-31 20:39:55,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:39:57,232 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-03-31 20:39:57,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 492 treesize of output 456 [2023-03-31 20:39:57,258 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-03-31 20:39:57,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 533 treesize of output 389 [2023-03-31 20:39:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-03-31 20:39:57,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712765214] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:39:57,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [863367952] [2023-03-31 20:39:57,341 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:39:57,341 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:39:57,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:39:57,341 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:39:57,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:39:57,353 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:39:57,478 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2023-03-31 20:39:57,495 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:39:57,498 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:40:05,929 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1103#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_15| Int) (|v_main_~#b~0.base_BEFORE_CALL_15| Int) (v_main_~x~0_BEFORE_CALL_15 Int)) (and (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_15|) (+ 399996 (* (- 4) v_main_~x~0_BEFORE_CALL_15))) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_15|) (* v_main_~x~0_BEFORE_CALL_15 4)))) (<= 0 v_main_~x~0_BEFORE_CALL_15) (< v_main_~x~0_BEFORE_CALL_15 100000) (<= 0 |v_main_~#a~0.base_BEFORE_CALL_15|) (<= 0 |v_main_~#b~0.base_BEFORE_CALL_15|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:40:05,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:40:05,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:40:05,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 10] total 31 [2023-03-31 20:40:05,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264513388] [2023-03-31 20:40:05,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:40:05,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-03-31 20:40:05,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:40:05,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-03-31 20:40:05,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1511, Unknown=7, NotChecked=80, Total=1806 [2023-03-31 20:40:05,932 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 28 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:40:22,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-31 20:40:22,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:40:22,903 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2023-03-31 20:40:22,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-03-31 20:40:22,903 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 28 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2023-03-31 20:40:22,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:40:22,904 INFO L225 Difference]: With dead ends: 81 [2023-03-31 20:40:22,904 INFO L226 Difference]: Without dead ends: 55 [2023-03-31 20:40:22,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=812, Invalid=4438, Unknown=10, NotChecked=142, Total=5402 [2023-03-31 20:40:22,906 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 53 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-03-31 20:40:22,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 102 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 219 Invalid, 1 Unknown, 55 Unchecked, 2.2s Time] [2023-03-31 20:40:22,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-03-31 20:40:22,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2023-03-31 20:40:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:40:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2023-03-31 20:40:22,943 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 39 [2023-03-31 20:40:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:40:22,943 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2023-03-31 20:40:22,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 28 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:40:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2023-03-31 20:40:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-03-31 20:40:22,944 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:40:22,944 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:40:22,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 20:40:23,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:40:23,152 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:40:23,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:40:23,152 INFO L85 PathProgramCache]: Analyzing trace with hash -968189768, now seen corresponding path program 3 times [2023-03-31 20:40:23,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:40:23,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962426535] [2023-03-31 20:40:23,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:40:23,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:40:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:40:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-03-31 20:40:23,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:40:23,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962426535] [2023-03-31 20:40:23,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962426535] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:40:23,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523104960] [2023-03-31 20:40:23,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:40:23,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:40:23,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:40:23,406 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) [2023-03-31 20:40:23,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 20:40:23,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:40:23,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:40:23,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-31 20:40:23,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:40:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-03-31 20:40:23,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:40:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-03-31 20:40:23,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523104960] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:40:23,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1921649927] [2023-03-31 20:40:23,727 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:40:23,727 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:40:23,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:40:23,728 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:40:23,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:40:23,746 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:40:23,824 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2023-03-31 20:40:23,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:40:23,841 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:40:24,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1716#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (exists ((v_main_~x~0_BEFORE_CALL_22 Int) (|v_main_~#a~0.base_BEFORE_CALL_22| Int) (|v_main_~#b~0.base_BEFORE_CALL_22| Int)) (and (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_22|) (* v_main_~x~0_BEFORE_CALL_22 4)) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_22|) (+ 399996 (* (- 4) v_main_~x~0_BEFORE_CALL_22))))) (<= 0 v_main_~x~0_BEFORE_CALL_22) (<= 0 |v_main_~#a~0.base_BEFORE_CALL_22|) (<= 0 |v_main_~#b~0.base_BEFORE_CALL_22|) (< v_main_~x~0_BEFORE_CALL_22 100000))) (= |#NULL.base| 0))' at error location [2023-03-31 20:40:24,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:40:24,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:40:24,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-03-31 20:40:24,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428213752] [2023-03-31 20:40:24,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:40:24,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-03-31 20:40:24,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:40:24,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-03-31 20:40:24,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1086, Unknown=0, NotChecked=0, Total=1482 [2023-03-31 20:40:24,163 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 20:40:24,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:40:24,270 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2023-03-31 20:40:24,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-03-31 20:40:24,270 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2023-03-31 20:40:24,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:40:24,271 INFO L225 Difference]: With dead ends: 111 [2023-03-31 20:40:24,271 INFO L226 Difference]: Without dead ends: 77 [2023-03-31 20:40:24,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=396, Invalid=1086, Unknown=0, NotChecked=0, Total=1482 [2023-03-31 20:40:24,272 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:40:24,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:40:24,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-03-31 20:40:24,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-03-31 20:40:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 67 states have (on average 1.044776119402985) internal successors, (70), 68 states have internal predecessors, (70), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:40:24,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2023-03-31 20:40:24,294 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 48 [2023-03-31 20:40:24,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:40:24,294 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2023-03-31 20:40:24,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 20:40:24,294 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2023-03-31 20:40:24,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-03-31 20:40:24,299 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:40:24,299 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:40:24,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-03-31 20:40:24,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:40:24,504 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:40:24,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:40:24,505 INFO L85 PathProgramCache]: Analyzing trace with hash 682984267, now seen corresponding path program 4 times [2023-03-31 20:40:24,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:40:24,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863000196] [2023-03-31 20:40:24,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:40:24,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:40:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:40:25,020 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 4 proven. 300 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2023-03-31 20:40:25,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:40:25,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863000196] [2023-03-31 20:40:25,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863000196] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:40:25,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900464382] [2023-03-31 20:40:25,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:40:25,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:40:25,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:40:25,036 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) [2023-03-31 20:40:25,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 20:40:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:40:25,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 26 conjunts are in the unsatisfiable core [2023-03-31 20:40:25,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:40:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-03-31 20:40:25,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:40:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 4 proven. 300 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2023-03-31 20:40:25,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900464382] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:40:25,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [132122229] [2023-03-31 20:40:25,914 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:40:25,914 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:40:25,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:40:25,914 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:40:25,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:40:25,926 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:40:25,997 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2023-03-31 20:40:26,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:40:26,010 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:40:26,325 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2557#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_29| Int) (|v_main_~#b~0.base_BEFORE_CALL_29| Int) (v_main_~x~0_BEFORE_CALL_29 Int)) (and (<= 0 |v_main_~#b~0.base_BEFORE_CALL_29|) (<= 0 |v_main_~#a~0.base_BEFORE_CALL_29|) (< v_main_~x~0_BEFORE_CALL_29 100000) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_29|) (* v_main_~x~0_BEFORE_CALL_29 4)) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_29|) (+ (* (- 4) v_main_~x~0_BEFORE_CALL_29) 399996)))) (<= 0 v_main_~x~0_BEFORE_CALL_29))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:40:26,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:40:26,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:40:26,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-03-31 20:40:26,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130454079] [2023-03-31 20:40:26,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:40:26,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-03-31 20:40:26,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:40:26,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-03-31 20:40:26,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1423, Invalid=2737, Unknown=0, NotChecked=0, Total=4160 [2023-03-31 20:40:26,329 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 53 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 20:40:26,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:40:26,566 INFO L93 Difference]: Finished difference Result 176 states and 231 transitions. [2023-03-31 20:40:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-03-31 20:40:26,566 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 74 [2023-03-31 20:40:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:40:26,567 INFO L225 Difference]: With dead ends: 176 [2023-03-31 20:40:26,567 INFO L226 Difference]: Without dead ends: 129 [2023-03-31 20:40:26,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1423, Invalid=2737, Unknown=0, NotChecked=0, Total=4160 [2023-03-31 20:40:26,568 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:40:26,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:40:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-03-31 20:40:26,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-03-31 20:40:26,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 120 states have internal predecessors, (122), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:40:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2023-03-31 20:40:26,594 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 74 [2023-03-31 20:40:26,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:40:26,594 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2023-03-31 20:40:26,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 20:40:26,594 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2023-03-31 20:40:26,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-03-31 20:40:26,595 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:40:26,595 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:40:26,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 20:40:26,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:40:26,801 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:40:26,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:40:26,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1519808363, now seen corresponding path program 5 times [2023-03-31 20:40:26,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:40:26,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834613787] [2023-03-31 20:40:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:40:26,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:40:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:40:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 4 proven. 1275 refuted. 0 times theorem prover too weak. 1286 trivial. 0 not checked. [2023-03-31 20:40:28,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:40:28,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834613787] [2023-03-31 20:40:28,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834613787] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:40:28,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134412449] [2023-03-31 20:40:28,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:40:28,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:40:28,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:40:28,484 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) [2023-03-31 20:40:28,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 20:40:28,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-31 20:40:28,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:40:28,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 50 conjunts are in the unsatisfiable core [2023-03-31 20:40:28,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:40:28,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-03-31 20:40:28,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2023-03-31 20:40:28,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 39 [2023-03-31 20:40:29,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2023-03-31 20:40:31,143 WARN L861 $PredicateComparison]: unable to prove that (exists ((|v_main_~#b~0.offset_BEFORE_CALL_32| Int) (v_main_~i~0_209 Int) (|v_main_~#a~0.base_BEFORE_CALL_32| Int) (|v_main_~#b~0.base_BEFORE_CALL_32| Int)) (and (not (= |v_main_~#a~0.base_BEFORE_CALL_32| |v_main_~#b~0.base_BEFORE_CALL_32|)) (= (select (select |c_#memory_int| |v_main_~#b~0.base_BEFORE_CALL_32|) (+ (* 4 v_main_~i~0_209) |v_main_~#b~0.offset_BEFORE_CALL_32| (- 8))) (select (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_32|) (+ 400004 (* (- 4) v_main_~i~0_209)))) (< v_main_~i~0_209 100000) (<= 99999 v_main_~i~0_209))) is different from true [2023-03-31 20:40:37,442 WARN L861 $PredicateComparison]: unable to prove that (exists ((|v_main_~#b~0.offset_BEFORE_CALL_33| Int) (v_main_~i~0_209 Int) (|v_main_~#a~0.base_BEFORE_CALL_33| Int) (|v_main_~#b~0.base_BEFORE_CALL_33| Int)) (and (not (= |v_main_~#a~0.base_BEFORE_CALL_33| |v_main_~#b~0.base_BEFORE_CALL_33|)) (< v_main_~i~0_209 100000) (<= 99999 v_main_~i~0_209) (= (select (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_33|) (+ 400004 (* (- 4) v_main_~i~0_209))) (select (select |c_#memory_int| |v_main_~#b~0.base_BEFORE_CALL_33|) (+ (* 4 v_main_~i~0_209) |v_main_~#b~0.offset_BEFORE_CALL_33| (- 8)))))) is different from true [2023-03-31 20:40:37,647 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 20:40:37,651 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-03-31 20:40:37,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 13 [2023-03-31 20:40:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 144 proven. 110 refuted. 0 times theorem prover too weak. 2304 trivial. 7 not checked. [2023-03-31 20:40:39,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:40:42,161 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-03-31 20:40:42,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1104 treesize of output 1036 [2023-03-31 20:40:42,189 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-03-31 20:40:42,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 662 treesize of output 537 [2023-03-31 20:40:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 4 proven. 154 refuted. 0 times theorem prover too weak. 2407 trivial. 0 not checked. [2023-03-31 20:40:42,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134412449] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:40:42,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [173939208] [2023-03-31 20:40:42,392 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:40:42,392 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:40:42,393 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:40:42,393 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:40:42,393 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:40:42,403 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:40:42,518 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2023-03-31 20:40:42,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:40:42,538 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:40:51,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3969#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_40| Int) (|v_main_~#b~0.base_BEFORE_CALL_40| Int) (v_main_~x~0_BEFORE_CALL_40 Int)) (and (< v_main_~x~0_BEFORE_CALL_40 100000) (<= 0 v_main_~x~0_BEFORE_CALL_40) (<= 0 |v_main_~#a~0.base_BEFORE_CALL_40|) (<= 0 |v_main_~#b~0.base_BEFORE_CALL_40|) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_40|) (+ (* (- 4) v_main_~x~0_BEFORE_CALL_40) 399996)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_40|) (* v_main_~x~0_BEFORE_CALL_40 4)))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:40:51,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:40:51,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:40:51,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 18, 12] total 78 [2023-03-31 20:40:51,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216114268] [2023-03-31 20:40:51,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:40:51,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-03-31 20:40:51,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:40:51,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-03-31 20:40:51,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1778, Invalid=5878, Unknown=8, NotChecked=346, Total=8010 [2023-03-31 20:40:51,182 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 78 states, 77 states have (on average 1.3116883116883118) internal successors, (101), 75 states have internal predecessors, (101), 7 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)