/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-examples/standard_partial_init_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:11:46,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:11:46,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:11:46,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:11:46,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:11:46,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:11:46,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:11:46,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:11:46,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:11:46,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:11:46,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:11:46,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:11:46,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:11:46,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:11:46,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:11:46,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:11:46,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:11:46,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:11:46,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:11:46,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:11:46,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:11:46,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:11:46,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:11:46,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:11:46,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 14:11:46,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:11:46,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:11:46,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:11:46,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:11:46,221 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:11:46,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:11:46,222 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:11:46,222 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:11:46,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:11:46,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:11:46,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:11:46,227 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 14:11:46,257 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:11:46,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:11:46,258 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:11:46,258 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:11:46,259 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:11:46,259 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:11:46,259 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:11:46,259 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:11:46,259 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:11:46,260 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:11:46,260 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:11:46,260 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:11:46,261 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:11:46,261 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:11:46,261 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:11:46,261 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:11:46,261 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:11:46,261 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:11:46,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:11:46,262 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:11:46,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:11:46,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:11:46,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:11:46,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:11:46,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:11:46,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:11:46,263 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:11:46,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:11:46,263 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:11:46,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:11:46,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:11:46,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:11:46,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:11:46,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:11:46,264 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:11:46,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:11:46,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:11:46,264 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:11:46,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:11:46,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:11:46,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:11:46,265 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:11:46,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:11:46,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:11:46,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:11:46,544 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:11:46,545 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:11:46,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partial_init_ground.i [2023-04-02 14:11:47,674 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:11:47,836 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:11:47,837 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partial_init_ground.i [2023-04-02 14:11:47,845 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11c9c7756/00e3a0882d2242639dca496dc5316a8a/FLAG58c31f832 [2023-04-02 14:11:47,856 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11c9c7756/00e3a0882d2242639dca496dc5316a8a [2023-04-02 14:11:47,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:11:47,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:11:47,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:11:47,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:11:47,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:11:47,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:11:47" (1/1) ... [2023-04-02 14:11:47,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21a170a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:47, skipping insertion in model container [2023-04-02 14:11:47,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:11:47" (1/1) ... [2023-04-02 14:11:47,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:11:47,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:11:48,001 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_partial_init_ground.i[821,834] [2023-04-02 14:11:48,016 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:11:48,024 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:11:48,033 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_partial_init_ground.i[821,834] [2023-04-02 14:11:48,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:11:48,053 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:11:48,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:48 WrapperNode [2023-04-02 14:11:48,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:11:48,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:11:48,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:11:48,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:11:48,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:48" (1/1) ... [2023-04-02 14:11:48,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:48" (1/1) ... [2023-04-02 14:11:48,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:48" (1/1) ... [2023-04-02 14:11:48,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:48" (1/1) ... [2023-04-02 14:11:48,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:48" (1/1) ... [2023-04-02 14:11:48,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:48" (1/1) ... [2023-04-02 14:11:48,082 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:48" (1/1) ... [2023-04-02 14:11:48,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:48" (1/1) ... [2023-04-02 14:11:48,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:11:48,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:11:48,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:11:48,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:11:48,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:48" (1/1) ... [2023-04-02 14:11:48,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:11:48,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:11:48,120 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 14:11:48,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 14:11:48,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:11:48,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:11:48,162 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:11:48,164 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:11:48,164 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:11:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:11:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:11:48,165 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 14:11:48,165 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 14:11:48,165 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:11:48,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:11:48,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:11:48,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 14:11:48,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:11:48,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:11:48,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:11:48,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:11:48,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:11:48,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:11:48,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:11:48,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:11:48,231 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:11:48,233 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:11:48,378 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:11:48,422 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:11:48,422 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-02 14:11:48,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:11:48 BoogieIcfgContainer [2023-04-02 14:11:48,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:11:48,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:11:48,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:11:48,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:11:48,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:11:47" (1/3) ... [2023-04-02 14:11:48,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268bfe33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:11:48, skipping insertion in model container [2023-04-02 14:11:48,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:11:48" (2/3) ... [2023-04-02 14:11:48,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268bfe33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:11:48, skipping insertion in model container [2023-04-02 14:11:48,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:11:48" (3/3) ... [2023-04-02 14:11:48,459 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partial_init_ground.i [2023-04-02 14:11:48,504 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:11:48,504 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:11:48,563 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:11:48,573 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;@657ff1c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:11:48,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:11:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:11:48,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 14:11:48,582 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:11:48,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:11:48,583 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:11:48,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:11:48,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1187538508, now seen corresponding path program 1 times [2023-04-02 14:11:48,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:11:48,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993087710] [2023-04-02 14:11:48,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:11:48,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:11:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:48,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:11:48,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:11:48,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993087710] [2023-04-02 14:11:48,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993087710] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:11:48,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:11:48,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:11:48,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987087855] [2023-04-02 14:11:48,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:11:48,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:11:48,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:11:48,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:11:48,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:11:48,880 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2023-04-02 14:11:48,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:11:48,927 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2023-04-02 14:11:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:11:48,929 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 [2023-04-02 14:11:48,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:11:48,935 INFO L225 Difference]: With dead ends: 40 [2023-04-02 14:11:48,935 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 14:11:48,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:11:48,941 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:11:48,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:11:48,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 14:11:48,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-02 14:11:48,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:11:48,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-04-02 14:11:48,972 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2023-04-02 14:11:48,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:11:48,973 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-04-02 14:11:48,973 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) [2023-04-02 14:11:48,973 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-04-02 14:11:48,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 14:11:48,974 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:11:48,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:11:48,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 14:11:48,974 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:11:48,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:11:48,975 INFO L85 PathProgramCache]: Analyzing trace with hash -435595302, now seen corresponding path program 1 times [2023-04-02 14:11:48,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:11:48,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625778889] [2023-04-02 14:11:48,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:11:48,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:11:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:11:49,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:11:49,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625778889] [2023-04-02 14:11:49,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625778889] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:11:49,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068201796] [2023-04-02 14:11:49,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:11:49,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:11:49,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:11:49,138 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:11:49,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 14:11:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:49,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:11:49,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:11:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:11:49,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:11:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:11:49,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068201796] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:11:49,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1253314997] [2023-04-02 14:11:49,368 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:11:49,368 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:11:49,371 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:11:49,379 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:11:49,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:11:49,483 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:11:49,988 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-04-02 14:11:50,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:11:50,033 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:11:50,658 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '209#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#C~0.base_BEFORE_CALL_1| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#C~0.base_BEFORE_CALL_1|) (<= 2 |v_main_~#C~0.base_BEFORE_CALL_1|) (<= 3 (+ |v_main_~#C~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (<= 1 (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_1|) 0)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:11:50,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:11:50,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:11:50,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:11:50,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880512282] [2023-04-02 14:11:50,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:11:50,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:11:50,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:11:50,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:11:50,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:11:50,661 INFO L87 Difference]: Start difference. First operand 21 states and 25 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) [2023-04-02 14:11:50,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:11:50,715 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2023-04-02 14:11:50,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:11:50,716 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 [2023-04-02 14:11:50,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:11:50,717 INFO L225 Difference]: With dead ends: 41 [2023-04-02 14:11:50,717 INFO L226 Difference]: Without dead ends: 27 [2023-04-02 14:11:50,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:11:50,722 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:11:50,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:11:50,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-02 14:11:50,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-02 14:11:50,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:11:50,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-04-02 14:11:50,732 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2023-04-02 14:11:50,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:11:50,733 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-04-02 14:11:50,733 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) [2023-04-02 14:11:50,733 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-04-02 14:11:50,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 14:11:50,734 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:11:50,734 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:11:50,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 14:11:50,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:11:50,940 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:11:50,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:11:50,941 INFO L85 PathProgramCache]: Analyzing trace with hash 795192396, now seen corresponding path program 2 times [2023-04-02 14:11:50,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:11:50,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316829833] [2023-04-02 14:11:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:11:50,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:11:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:11:51,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:11:51,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316829833] [2023-04-02 14:11:51,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316829833] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:11:51,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618295780] [2023-04-02 14:11:51,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:11:51,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:11:51,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:11:51,161 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:11:51,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 14:11:51,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:11:51,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:11:51,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:11:51,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:11:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:11:51,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:11:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:11:51,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618295780] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:11:51,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [452473234] [2023-04-02 14:11:51,361 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:11:51,362 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:11:51,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:11:51,363 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:11:51,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:11:51,392 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:11:51,590 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-04-02 14:11:51,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:11:51,620 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:11:52,190 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '463#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#C~0.base_BEFORE_CALL_2| Int)) (and (<= 2 |v_main_~#C~0.base_BEFORE_CALL_2|) (<= 3 (+ |v_main_~#C~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#C~0.base_BEFORE_CALL_2|) (<= 1 (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_2|) 0)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:11:52,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:11:52,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:11:52,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 14:11:52,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818685511] [2023-04-02 14:11:52,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:11:52,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 14:11:52,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:11:52,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 14:11:52,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2023-04-02 14:11:52,193 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:11:52,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:11:52,254 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2023-04-02 14:11:52,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 14:11:52,255 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 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 [2023-04-02 14:11:52,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:11:52,255 INFO L225 Difference]: With dead ends: 56 [2023-04-02 14:11:52,256 INFO L226 Difference]: Without dead ends: 39 [2023-04-02 14:11:52,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2023-04-02 14:11:52,257 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:11:52,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:11:52,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-02 14:11:52,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-04-02 14:11:52,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:11:52,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-04-02 14:11:52,264 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 20 [2023-04-02 14:11:52,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:11:52,264 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-04-02 14:11:52,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:11:52,265 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-04-02 14:11:52,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 14:11:52,266 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:11:52,266 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:11:52,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 14:11:52,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 14:11:52,467 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:11:52,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:11:52,467 INFO L85 PathProgramCache]: Analyzing trace with hash -795501236, now seen corresponding path program 3 times [2023-04-02 14:11:52,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:11:52,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577896719] [2023-04-02 14:11:52,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:11:52,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:11:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 14:11:52,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:11:52,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577896719] [2023-04-02 14:11:52,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577896719] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:11:52,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698686872] [2023-04-02 14:11:52,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:11:52,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:11:52,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:11:52,831 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:11:52,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 14:11:52,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:11:52,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:11:52,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:11:52,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:11:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 14:11:52,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:11:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 14:11:53,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698686872] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:11:53,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1932229497] [2023-04-02 14:11:53,189 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:11:53,189 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:11:53,190 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:11:53,191 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:11:53,191 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:11:53,212 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:11:53,375 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-04-02 14:11:53,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:11:53,413 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:11:53,957 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '855#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#C~0.base_BEFORE_CALL_3| Int)) (and (<= 3 (+ |v_main_~#C~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (<= 1 (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_3|) 0)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#C~0.base_BEFORE_CALL_3|) (<= 2 |v_main_~#C~0.base_BEFORE_CALL_3|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:11:53,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:11:53,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:11:53,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 14:11:53,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768663568] [2023-04-02 14:11:53,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:11:53,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 14:11:53,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:11:53,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 14:11:53,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=922, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 14:11:53,960 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:11:54,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:11:54,102 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2023-04-02 14:11:54,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 14:11:54,103 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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 32 [2023-04-02 14:11:54,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:11:54,105 INFO L225 Difference]: With dead ends: 86 [2023-04-02 14:11:54,105 INFO L226 Difference]: Without dead ends: 63 [2023-04-02 14:11:54,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=338, Invalid=922, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 14:11:54,107 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:11:54,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:11:54,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-02 14:11:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-04-02 14:11:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:11:54,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2023-04-02 14:11:54,115 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 32 [2023-04-02 14:11:54,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:11:54,115 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2023-04-02 14:11:54,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:11:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2023-04-02 14:11:54,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-02 14:11:54,116 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:11:54,117 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:11:54,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 14:11:54,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:11:54,323 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:11:54,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:11:54,324 INFO L85 PathProgramCache]: Analyzing trace with hash 919916364, now seen corresponding path program 4 times [2023-04-02 14:11:54,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:11:54,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636757783] [2023-04-02 14:11:54,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:11:54,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:11:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 14:11:55,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:11:55,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636757783] [2023-04-02 14:11:55,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636757783] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:11:55,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87693706] [2023-04-02 14:11:55,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:11:55,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:11:55,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:11:55,141 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:11:55,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 14:11:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:55,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 14:11:55,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:11:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 14:11:55,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:11:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 14:11:56,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87693706] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:11:56,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1269720570] [2023-04-02 14:11:56,066 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:11:56,066 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:11:56,066 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:11:56,067 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:11:56,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:11:56,085 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:11:56,229 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-04-02 14:11:56,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:11:56,265 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:11:56,830 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1523#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0) (exists ((|v_main_~#C~0.base_BEFORE_CALL_4| Int)) (and (<= 3 (+ |v_main_~#C~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#C~0.base_BEFORE_CALL_4|) (<= 1 (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_4|) 0)) (<= 2 |v_main_~#C~0.base_BEFORE_CALL_4|))))' at error location [2023-04-02 14:11:56,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:11:56,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:11:56,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-02 14:11:56,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838543345] [2023-04-02 14:11:56,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:11:56,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-02 14:11:56,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:11:56,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-02 14:11:56,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1214, Invalid=2326, Unknown=0, NotChecked=0, Total=3540 [2023-04-02 14:11:56,833 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:11:57,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:11:57,087 INFO L93 Difference]: Finished difference Result 146 states and 201 transitions. [2023-04-02 14:11:57,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-02 14:11:57,087 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 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 56 [2023-04-02 14:11:57,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:11:57,088 INFO L225 Difference]: With dead ends: 146 [2023-04-02 14:11:57,088 INFO L226 Difference]: Without dead ends: 111 [2023-04-02 14:11:57,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1214, Invalid=2326, Unknown=0, NotChecked=0, Total=3540 [2023-04-02 14:11:57,091 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:11:57,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:11:57,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-02 14:11:57,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2023-04-02 14:11:57,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:11:57,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2023-04-02 14:11:57,100 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 56 [2023-04-02 14:11:57,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:11:57,101 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2023-04-02 14:11:57,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:11:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2023-04-02 14:11:57,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-02 14:11:57,103 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:11:57,103 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:11:57,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 14:11:57,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:11:57,310 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:11:57,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:11:57,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1849658548, now seen corresponding path program 5 times [2023-04-02 14:11:57,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:11:57,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548874361] [2023-04-02 14:11:57,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:11:57,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:11:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:11:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-04-02 14:11:59,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:11:59,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548874361] [2023-04-02 14:11:59,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548874361] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:11:59,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209962484] [2023-04-02 14:11:59,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:11:59,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:11:59,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:11:59,965 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:11:59,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process