/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 EqDomain -i ../sv-benchmarks/c/array-tiling/nr4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:50:51,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:50:51,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:50:51,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 08:50:51,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 08:50:51,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 08:50:51,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 08:50:51,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 08:50:51,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 08:50:51,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 08:50:51,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 08:50:51,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 08:50:51,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:50:51,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:50:51,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:50:51,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:50:51,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:50:51,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:50:51,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:50:51,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:50:51,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:50:51,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:50:51,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:50:51,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:50:51,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 08:50:51,225 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 08:50:51,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 08:50:51,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 08:50:51,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 08:50:51,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 08:50:51,227 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:50:51,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:50:51,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:50:51,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:50:51,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:50:51,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:50:51,231 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:50:51,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:50:51,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:50:51,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:50:51,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:50:51,243 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 08:50:51,277 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:50:51,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:50:51,277 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:50:51,278 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:50:51,278 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:50:51,278 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:50:51,278 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:50:51,279 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:50:51,279 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:50:51,279 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:50:51,279 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:50:51,279 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:50:51,279 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:50:51,279 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:50:51,279 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:50:51,279 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:50:51,280 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:50:51,280 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:50:51,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:50:51,280 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:50:51,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:50:51,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:50:51,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:50:51,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:50:51,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:50:51,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:50:51,284 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:50:51,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:50:51,284 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:50:51,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:50:51,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:50:51,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:50:51,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:50:51,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:50:51,285 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:50:51,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:50:51,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:50:51,286 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:50:51,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:50:51,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:50:51,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:50:51,287 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:50:51,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:50:51,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:50:51,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:50:51,499 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:50:51,499 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:50:51,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/nr4.c [2023-04-01 08:50:52,741 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:50:53,004 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:50:53,004 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/nr4.c [2023-04-01 08:50:53,012 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba72483bb/fb10df8ec4da407581e46c3c75f19ab5/FLAG7d6ae91c5 [2023-04-01 08:50:53,025 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba72483bb/fb10df8ec4da407581e46c3c75f19ab5 [2023-04-01 08:50:53,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:50:53,028 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:50:53,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:50:53,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:50:53,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:50:53,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:50:53" (1/1) ... [2023-04-01 08:50:53,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a69d096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:53, skipping insertion in model container [2023-04-01 08:50:53,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:50:53" (1/1) ... [2023-04-01 08:50:53,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:50:53,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:50:53,170 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-tiling/nr4.c[394,407] [2023-04-01 08:50:53,184 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:50:53,192 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:50:53,207 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-tiling/nr4.c[394,407] [2023-04-01 08:50:53,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:50:53,232 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:50:53,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:53 WrapperNode [2023-04-01 08:50:53,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:50:53,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:50:53,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:50:53,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:50:53,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:53" (1/1) ... [2023-04-01 08:50:53,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:53" (1/1) ... [2023-04-01 08:50:53,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:53" (1/1) ... [2023-04-01 08:50:53,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:53" (1/1) ... [2023-04-01 08:50:53,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:53" (1/1) ... [2023-04-01 08:50:53,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:53" (1/1) ... [2023-04-01 08:50:53,256 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:53" (1/1) ... [2023-04-01 08:50:53,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:53" (1/1) ... [2023-04-01 08:50:53,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:50:53,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:50:53,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:50:53,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:50:53,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:53" (1/1) ... [2023-04-01 08:50:53,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:50:53,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:50:53,288 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 08:50:53,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 08:50:53,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:50:53,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:50:53,322 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:50:53,322 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 08:50:53,322 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 08:50:53,322 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:50:53,322 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:50:53,322 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:50:53,322 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:50:53,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:50:53,323 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 08:50:53,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 08:50:53,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 08:50:53,323 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:50:53,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 08:50:53,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:50:53,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:50:53,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:50:53,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:50:53,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:50:53,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:50:53,383 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:50:53,385 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:50:53,538 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:50:53,585 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:50:53,586 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 08:50:53,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:50:53 BoogieIcfgContainer [2023-04-01 08:50:53,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:50:53,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:50:53,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:50:53,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:50:53,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:50:53" (1/3) ... [2023-04-01 08:50:53,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27493d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:50:53, skipping insertion in model container [2023-04-01 08:50:53,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:53" (2/3) ... [2023-04-01 08:50:53,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27493d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:50:53, skipping insertion in model container [2023-04-01 08:50:53,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:50:53" (3/3) ... [2023-04-01 08:50:53,595 INFO L112 eAbstractionObserver]: Analyzing ICFG nr4.c [2023-04-01 08:50:53,619 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:50:53,619 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:50:53,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:50:53,694 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;@54ea2eb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:50:53,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:50:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:50:53,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 08:50:53,707 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:50:53,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:50:53,708 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:50:53,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:50:53,712 INFO L85 PathProgramCache]: Analyzing trace with hash -340327685, now seen corresponding path program 1 times [2023-04-01 08:50:53,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:50:53,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058318209] [2023-04-01 08:50:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:53,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:50:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:50:54,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:50:54,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058318209] [2023-04-01 08:50:54,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058318209] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:50:54,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:50:54,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 08:50:54,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214306329] [2023-04-01 08:50:54,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:50:54,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 08:50:54,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:50:54,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 08:50:54,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:50:54,383 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:50:54,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:50:54,459 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2023-04-01 08:50:54,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 08:50:54,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-04-01 08:50:54,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:50:54,467 INFO L225 Difference]: With dead ends: 52 [2023-04-01 08:50:54,467 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 08:50:54,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:50:54,473 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:50:54,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 60 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:50:54,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 08:50:54,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2023-04-01 08:50:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 08:50:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-04-01 08:50:54,506 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2023-04-01 08:50:54,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:50:54,506 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-04-01 08:50:54,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:50:54,507 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-04-01 08:50:54,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 08:50:54,507 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:50:54,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:50:54,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 08:50:54,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:50:54,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:50:54,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1992780016, now seen corresponding path program 1 times [2023-04-01 08:50:54,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:50:54,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193075389] [2023-04-01 08:50:54,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:54,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:50:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:50:54,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:50:54,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193075389] [2023-04-01 08:50:54,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193075389] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:50:54,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:50:54,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 08:50:54,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062567168] [2023-04-01 08:50:54,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:50:54,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:50:54,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:50:54,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:50:54,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:50:54,574 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 08:50:54,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:50:54,597 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2023-04-01 08:50:54,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:50:54,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-04-01 08:50:54,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:50:54,598 INFO L225 Difference]: With dead ends: 35 [2023-04-01 08:50:54,598 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 08:50:54,599 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 [2023-04-01 08:50:54,600 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:50:54,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:50:54,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 08:50:54,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-01 08:50:54,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 08:50:54,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-01 08:50:54,609 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2023-04-01 08:50:54,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:50:54,609 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-01 08:50:54,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 08:50:54,609 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-01 08:50:54,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 08:50:54,610 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:50:54,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:50:54,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 08:50:54,610 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:50:54,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:50:54,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1019763640, now seen corresponding path program 1 times [2023-04-01 08:50:54,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:50:54,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361122734] [2023-04-01 08:50:54,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:54,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:50:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:50:54,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:50:54,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361122734] [2023-04-01 08:50:54,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361122734] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:50:54,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120764863] [2023-04-01 08:50:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:54,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:50:54,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:50:54,707 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:50:54,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 08:50:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:54,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:50:54,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:50:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:50:54,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:50:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:50:54,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120764863] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:50:54,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1377845246] [2023-04-01 08:50:54,910 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:50:54,910 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:50:54,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:50:54,920 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:50:54,921 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:50:55,194 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 79 for LOIs [2023-04-01 08:50:59,741 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 120 for LOIs [2023-04-01 08:50:59,862 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 94 for LOIs [2023-04-01 08:50:59,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:50:59,885 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:51:02,011 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '355#(and (= (mod ~CELLCOUNT~0 4) 0) (exists ((|v_old(#length)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_3| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_3| (Array Int Int)) (|v_main_~#volArray~0.base_BEFORE_CALL_3| Int)) (and (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) |v_old(#length)_BEFORE_CALL_3|)) (= (select |v_old(#valid)_BEFORE_CALL_3| |v_main_~#volArray~0.base_BEFORE_CALL_3|) 0) (not (= (select (select |#memory_int| |v_main_~#volArray~0.base_BEFORE_CALL_3|) 0) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 5) 0) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_3| 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_3| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_3| |v_old(#length)_BEFORE_CALL_3|)) (= 52 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 2)) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_3| 1)) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 3)) (= (select |v_old(#length)_BEFORE_CALL_3| 2) 6) (= 114 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 1)) (= 2 (select |v_old(#length)_BEFORE_CALL_3| 1)) (= (select |v_old(#length)_BEFORE_CALL_3| 3) 12) (not (= |v_old(#length)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (< (select (select |#memory_int| |v_main_~#volArray~0.base_BEFORE_CALL_3|) 0) 2) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) |v_old(#valid)_BEFORE_CALL_3|)) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 0)) (not (= |v_old(#valid)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select |v_old(#valid)_BEFORE_CALL_3| 2) 1) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_3| 2)) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_3| 1) 1) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_3| 3)) (= (select |v_old(#valid)_BEFORE_CALL_3| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 4) 99) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) (select |v_old(#memory_int)_BEFORE_CALL_3| 1))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (< 0 ~CELLCOUNT~0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:51:02,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:51:02,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:51:02,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 08:51:02,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277168932] [2023-04-01 08:51:02,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:51:02,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 08:51:02,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:51:02,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 08:51:02,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=439, Unknown=2, NotChecked=0, Total=506 [2023-04-01 08:51:02,015 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 08:51:02,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:51:02,060 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2023-04-01 08:51:02,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:51:02,060 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-04-01 08:51:02,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:51:02,061 INFO L225 Difference]: With dead ends: 39 [2023-04-01 08:51:02,061 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 08:51:02,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=65, Invalid=439, Unknown=2, NotChecked=0, Total=506 [2023-04-01 08:51:02,063 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:51:02,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:51:02,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 08:51:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 08:51:02,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 08:51:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-04-01 08:51:02,068 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2023-04-01 08:51:02,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:51:02,069 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-04-01 08:51:02,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 08:51:02,069 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-04-01 08:51:02,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 08:51:02,070 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:51:02,070 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:51:02,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 08:51:02,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:51:02,277 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:51:02,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:51:02,278 INFO L85 PathProgramCache]: Analyzing trace with hash 782728944, now seen corresponding path program 2 times [2023-04-01 08:51:02,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:51:02,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535559485] [2023-04-01 08:51:02,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:51:02,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:51:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:51:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:51:03,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:51:03,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535559485] [2023-04-01 08:51:03,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535559485] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:51:03,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465697903] [2023-04-01 08:51:03,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:51:03,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:51:03,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:51:03,224 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:51:03,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 08:51:03,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 08:51:03,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:51:03,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 41 conjunts are in the unsatisfiable core [2023-04-01 08:51:03,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:51:03,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 08:51:03,458 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 19 treesize of output 18 [2023-04-01 08:51:03,492 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 19 treesize of output 18 [2023-04-01 08:51:03,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 46 [2023-04-01 08:51:03,553 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-04-01 08:51:03,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 26 [2023-04-01 08:51:03,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-04-01 08:51:03,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2023-04-01 08:51:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:51:03,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:51:03,845 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 13 treesize of output 9 [2023-04-01 08:51:05,875 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((main_~j~0 Int)) (or (< 1 main_~j~0) (forall ((v_ArrVal_64 Int)) (let ((.cse0 (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* main_~j~0 (- 4)) (* c_main_~i~0 16) |c_main_~#volArray~0.offset|) v_ArrVal_64) |c_main_~#volArray~0.offset|))) (or (< c_main_~MINVAL~0 (+ .cse0 1)) (= .cse0 0)))))) (< 1 c_main_~MINVAL~0)) is different from false [2023-04-01 08:51:05,918 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 47 treesize of output 43 [2023-04-01 08:51:06,037 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 127 treesize of output 123 [2023-04-01 08:51:06,180 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:06,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 49 [2023-04-01 08:51:06,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:06,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-04-01 08:51:06,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 105 [2023-04-01 08:51:06,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:06,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1316 treesize of output 1301 [2023-04-01 08:51:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-04-01 08:51:06,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465697903] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:51:06,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1705292877] [2023-04-01 08:51:06,616 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:51:06,616 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:51:06,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:51:06,617 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:51:06,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:51:06,718 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 79 for LOIs [2023-04-01 08:51:10,166 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 120 for LOIs [2023-04-01 08:51:10,250 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 94 for LOIs [2023-04-01 08:51:10,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:51:10,267 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:51:12,327 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '647#(and (= (mod ~CELLCOUNT~0 4) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (< 0 ~CELLCOUNT~0) (= |#NULL.offset| 0) (exists ((|v_old(#valid)_BEFORE_CALL_7| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_7| (Array Int (Array Int Int))) (|v_main_~#volArray~0.base_BEFORE_CALL_7| Int) (|v_old(#length)_BEFORE_CALL_7| (Array Int Int))) (and (= (select |v_old(#valid)_BEFORE_CALL_7| 1) 1) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_7| 1)) (= (select |v_old(#valid)_BEFORE_CALL_7| |v_main_~#volArray~0.base_BEFORE_CALL_7|) 0) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_7| 3)) (= (select |v_old(#valid)_BEFORE_CALL_7| 2) 1) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_7| 0)) (not (= (select (select |#memory_int| |v_main_~#volArray~0.base_BEFORE_CALL_7|) 0) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 0) 110) (= (select |v_old(#valid)_BEFORE_CALL_7| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 1) 0) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 0) 48) (= (select |v_old(#valid)_BEFORE_CALL_7| 3) 1) (< (select (select |#memory_int| |v_main_~#volArray~0.base_BEFORE_CALL_7|) 0) 2) (= 99 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 4)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#valid)_BEFORE_CALL_7|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 2) |v_old(#length)_BEFORE_CALL_7|)) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_7| 2)) (= 2 (select |v_old(#length)_BEFORE_CALL_7| 1)) (= 52 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 2)) (= 114 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 1)) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 5)) (= (select |v_old(#length)_BEFORE_CALL_7| 3) 12) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#length)_BEFORE_CALL_7|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 2) |v_old(#valid)_BEFORE_CALL_7|)) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_7| |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_7| |v_old(#length)_BEFORE_CALL_7|)) (= 6 (select |v_old(#length)_BEFORE_CALL_7| 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) (select |v_old(#memory_int)_BEFORE_CALL_7| 2))))) (= |#NULL.base| 0))' at error location [2023-04-01 08:51:12,328 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:51:12,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:51:12,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 16] total 37 [2023-04-01 08:51:12,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931532845] [2023-04-01 08:51:12,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:51:12,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-01 08:51:12,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:51:12,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-01 08:51:12,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=2336, Unknown=3, NotChecked=100, Total=2756 [2023-04-01 08:51:12,332 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 37 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:51:13,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:51:13,170 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2023-04-01 08:51:13,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 08:51:13,171 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 23 [2023-04-01 08:51:13,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:51:13,173 INFO L225 Difference]: With dead ends: 55 [2023-04-01 08:51:13,173 INFO L226 Difference]: Without dead ends: 53 [2023-04-01 08:51:13,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1641 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=589, Invalid=3968, Unknown=3, NotChecked=132, Total=4692 [2023-04-01 08:51:13,176 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 160 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 08:51:13,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 125 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 357 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2023-04-01 08:51:13,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-01 08:51:13,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2023-04-01 08:51:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:51:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2023-04-01 08:51:13,187 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 23 [2023-04-01 08:51:13,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:51:13,187 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2023-04-01 08:51:13,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:51:13,188 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2023-04-01 08:51:13,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 08:51:13,188 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:51:13,188 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:51:13,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 08:51:13,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 08:51:13,395 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:51:13,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:51:13,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1049407504, now seen corresponding path program 1 times [2023-04-01 08:51:13,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:51:13,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797399018] [2023-04-01 08:51:13,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:51:13,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:51:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:51:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:51:13,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:51:13,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797399018] [2023-04-01 08:51:13,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797399018] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:51:13,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870432760] [2023-04-01 08:51:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:51:13,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:51:13,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:51:13,931 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:51:13,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 08:51:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:51:13,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-01 08:51:13,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:51:14,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 08:51:14,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:51:14,131 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 22 [2023-04-01 08:51:14,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:51:14,146 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 22 [2023-04-01 08:51:14,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2023-04-01 08:51:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:51:14,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:51:14,408 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 17 treesize of output 9 [2023-04-01 08:51:16,481 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 59 treesize of output 51 [2023-04-01 08:51:20,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:20,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 49 [2023-04-01 08:51:20,611 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:20,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-04-01 08:51:20,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 88 [2023-04-01 08:51:20,645 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:20,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 328 treesize of output 315 [2023-04-01 08:51:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:51:20,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870432760] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:51:20,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1105593662] [2023-04-01 08:51:20,927 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 08:51:20,927 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:51:20,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:51:20,928 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:51:20,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:51:20,985 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 79 for LOIs [2023-04-01 08:51:26,061 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 122 for LOIs [2023-04-01 08:51:26,190 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 94 for LOIs [2023-04-01 08:51:26,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:51:26,204 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:51:28,280 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1046#(and (= (mod ~CELLCOUNT~0 4) 0) (exists ((|v_old(#length)_BEFORE_CALL_25| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_25| (Array Int (Array Int Int))) (|v_main_~#volArray~0.base_BEFORE_CALL_27| Int) (|v_old(#valid)_BEFORE_CALL_25| (Array Int Int)) (v_main_~i~0_BEFORE_CALL_19 Int)) (and (not (= |v_main_~#volArray~0.base_BEFORE_CALL_27| 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 2) 2) 52) (not (= |v_old(#valid)_BEFORE_CALL_25| (select |v_old(#memory_int)_BEFORE_CALL_25| 1))) (not (= |v_old(#valid)_BEFORE_CALL_25| |v_old(#length)_BEFORE_CALL_25|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_25| 2) |v_old(#length)_BEFORE_CALL_25|)) (= (select |v_old(#length)_BEFORE_CALL_25| 2) 6) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 1) 1) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 2) 3) 46) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 2) 5) 0) (= (select |v_old(#valid)_BEFORE_CALL_25| 2) 1) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_27| 1)) (= (select |v_old(#valid)_BEFORE_CALL_25| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 2) 1) 114) (< v_main_~i~0_BEFORE_CALL_19 ~CELLCOUNT~0) (= (select |v_old(#valid)_BEFORE_CALL_25| |v_main_~#volArray~0.base_BEFORE_CALL_27|) 0) (not (= 3 |v_main_~#volArray~0.base_BEFORE_CALL_27|)) (< (select (select |#memory_int| |v_main_~#volArray~0.base_BEFORE_CALL_27|) (* v_main_~i~0_BEFORE_CALL_19 4)) 2) (not (= (select (select |#memory_int| |v_main_~#volArray~0.base_BEFORE_CALL_27|) (* v_main_~i~0_BEFORE_CALL_19 4)) 0)) (= (select |v_old(#valid)_BEFORE_CALL_25| 3) 1) (= (select |v_old(#valid)_BEFORE_CALL_25| 0) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_25| 2) (select |v_old(#memory_int)_BEFORE_CALL_25| 1))) (not (= 2 |v_main_~#volArray~0.base_BEFORE_CALL_27|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 2) 4) 99) (= 2 (select |v_old(#length)_BEFORE_CALL_25| 1)) (not (= |#StackHeapBarrier| |v_main_~#volArray~0.base_BEFORE_CALL_27|)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_25| 1) 0)) (= (select |v_old(#length)_BEFORE_CALL_25| 3) 12) (not (= |v_old(#length)_BEFORE_CALL_25| (select |v_old(#memory_int)_BEFORE_CALL_25| 1))) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_25| 2) 0)) (not (= |v_old(#valid)_BEFORE_CALL_25| (select |v_old(#memory_int)_BEFORE_CALL_25| 2))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:51:28,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:51:28,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:51:28,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 16] total 32 [2023-04-01 08:51:28,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602747525] [2023-04-01 08:51:28,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:51:28,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-01 08:51:28,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:51:28,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-01 08:51:28,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2106, Unknown=4, NotChecked=0, Total=2352 [2023-04-01 08:51:28,283 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 32 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 7 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 08:51:29,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:51:29,082 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2023-04-01 08:51:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 08:51:29,089 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 7 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 30 [2023-04-01 08:51:29,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:51:29,094 INFO L225 Difference]: With dead ends: 54 [2023-04-01 08:51:29,094 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 08:51:29,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=554, Invalid=3998, Unknown=4, NotChecked=0, Total=4556 [2023-04-01 08:51:29,097 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 126 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 08:51:29,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 184 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 08:51:29,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 08:51:29,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2023-04-01 08:51:29,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 08:51:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-04-01 08:51:29,119 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 30 [2023-04-01 08:51:29,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:51:29,119 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-04-01 08:51:29,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 7 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 08:51:29,120 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-04-01 08:51:29,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 08:51:29,123 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:51:29,123 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:51:29,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 08:51:29,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:51:29,332 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:51:29,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:51:29,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2000422160, now seen corresponding path program 2 times [2023-04-01 08:51:29,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:51:29,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451956238] [2023-04-01 08:51:29,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:51:29,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:51:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:51:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:51:29,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:51:29,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451956238] [2023-04-01 08:51:29,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451956238] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:51:29,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49270037] [2023-04-01 08:51:29,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:51:29,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:51:29,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:51:29,842 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:51:29,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 08:51:29,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 08:51:29,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:51:29,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-01 08:51:29,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:51:30,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 08:51:30,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 46 [2023-04-01 08:51:30,061 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-04-01 08:51:30,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 26 [2023-04-01 08:51:30,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2023-04-01 08:51:30,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2023-04-01 08:51:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 08:51:30,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:51:30,579 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 17 treesize of output 9 [2023-04-01 08:51:36,720 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:36,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 49 [2023-04-01 08:51:36,732 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:36,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-04-01 08:51:36,768 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 59 treesize of output 51 [2023-04-01 08:51:36,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 60 [2023-04-01 08:51:36,790 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:36,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 77 [2023-04-01 08:51:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:51:36,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49270037] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:51:36,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1828606583] [2023-04-01 08:51:36,910 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 08:51:36,910 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:51:36,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:51:36,910 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:51:36,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:51:36,962 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 79 for LOIs [2023-04-01 08:51:41,023 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 122 for LOIs [2023-04-01 08:51:41,186 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 94 for LOIs [2023-04-01 08:51:41,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:51:41,200 INFO L180 IcfgInterpreter]: Interpretation finished