/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 21:32:49,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 21:32:49,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 21:32:49,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 21:32:49,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 21:32:49,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 21:32:49,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 21:32:49,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 21:32:49,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 21:32:49,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 21:32:49,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 21:32:49,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 21:32:49,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 21:32:49,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 21:32:49,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 21:32:49,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 21:32:49,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 21:32:49,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 21:32:49,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 21:32:49,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 21:32:49,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 21:32:49,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 21:32:49,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 21:32:49,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 21:32:49,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 21:32:49,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 21:32:49,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 21:32:49,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 21:32:49,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 21:32:49,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 21:32:49,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 21:32:49,168 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 21:32:49,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 21:32:49,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 21:32:49,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 21:32:49,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 21:32:49,170 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 21:32:49,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 21:32:49,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 21:32:49,171 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 21:32:49,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 21:32:49,177 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 21:32:49,200 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 21:32:49,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 21:32:49,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 21:32:49,201 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 21:32:49,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 21:32:49,202 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 21:32:49,202 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 21:32:49,202 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 21:32:49,202 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 21:32:49,202 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 21:32:49,203 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 21:32:49,203 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 21:32:49,203 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 21:32:49,203 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 21:32:49,203 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 21:32:49,204 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 21:32:49,204 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 21:32:49,204 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 21:32:49,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 21:32:49,205 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 21:32:49,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 21:32:49,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 21:32:49,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 21:32:49,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 21:32:49,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 21:32:49,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 21:32:49,206 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 21:32:49,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 21:32:49,206 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 21:32:49,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 21:32:49,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 21:32:49,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 21:32:49,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:32:49,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 21:32:49,207 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 21:32:49,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 21:32:49,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 21:32:49,207 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 21:32:49,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 21:32:49,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 21:32:49,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 21:32:49,208 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 21:32:49,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 21:32:49,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 21:32:49,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 21:32:49,475 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 21:32:49,475 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 21:32:49,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2023-04-02 21:32:50,569 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 21:32:50,814 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 21:32:50,815 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2023-04-02 21:32:50,833 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e73d4960/7328db814e7c4398b26569d2c834ba5c/FLAGcdfd7f735 [2023-04-02 21:32:50,848 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e73d4960/7328db814e7c4398b26569d2c834ba5c [2023-04-02 21:32:50,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 21:32:50,852 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 21:32:50,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 21:32:50,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 21:32:50,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 21:32:50,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:32:50" (1/1) ... [2023-04-02 21:32:50,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59072ff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:32:50, skipping insertion in model container [2023-04-02 21:32:50,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:32:50" (1/1) ... [2023-04-02 21:32:50,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 21:32:50,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 21:32:51,134 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/forester-heap/dll-simple-white-blue-2.i[22778,22791] [2023-04-02 21:32:51,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:32:51,148 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 21:32:51,205 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/forester-heap/dll-simple-white-blue-2.i[22778,22791] [2023-04-02 21:32:51,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:32:51,229 INFO L208 MainTranslator]: Completed translation [2023-04-02 21:32:51,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:32:51 WrapperNode [2023-04-02 21:32:51,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 21:32:51,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 21:32:51,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 21:32:51,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 21:32:51,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:32:51" (1/1) ... [2023-04-02 21:32:51,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:32:51" (1/1) ... [2023-04-02 21:32:51,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:32:51" (1/1) ... [2023-04-02 21:32:51,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:32:51" (1/1) ... [2023-04-02 21:32:51,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:32:51" (1/1) ... [2023-04-02 21:32:51,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:32:51" (1/1) ... [2023-04-02 21:32:51,294 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:32:51" (1/1) ... [2023-04-02 21:32:51,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:32:51" (1/1) ... [2023-04-02 21:32:51,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 21:32:51,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 21:32:51,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 21:32:51,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 21:32:51,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:32:51" (1/1) ... [2023-04-02 21:32:51,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:32:51,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:32:51,333 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 21:32:51,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 21:32:51,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 21:32:51,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 21:32:51,364 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 21:32:51,364 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 21:32:51,364 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-02 21:32:51,364 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-02 21:32:51,364 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-02 21:32:51,365 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-02 21:32:51,365 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-02 21:32:51,365 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-02 21:32:51,365 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-02 21:32:51,365 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-02 21:32:51,365 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-02 21:32:51,365 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-02 21:32:51,365 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-02 21:32:51,365 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-02 21:32:51,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-02 21:32:51,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-02 21:32:51,366 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-02 21:32:51,366 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-02 21:32:51,366 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-02 21:32:51,366 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-02 21:32:51,366 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-02 21:32:51,366 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-02 21:32:51,366 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-02 21:32:51,367 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-02 21:32:51,367 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-02 21:32:51,367 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-02 21:32:51,367 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-02 21:32:51,367 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-02 21:32:51,367 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-02 21:32:51,367 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-02 21:32:51,367 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-02 21:32:51,367 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-02 21:32:51,368 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-02 21:32:51,368 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-02 21:32:51,368 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-02 21:32:51,368 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-02 21:32:51,368 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-02 21:32:51,368 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-02 21:32:51,368 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-02 21:32:51,368 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-02 21:32:51,368 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-02 21:32:51,369 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-02 21:32:51,369 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-02 21:32:51,369 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-02 21:32:51,369 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-02 21:32:51,369 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-02 21:32:51,369 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-02 21:32:51,369 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-02 21:32:51,369 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-02 21:32:51,370 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-02 21:32:51,370 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-02 21:32:51,370 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-02 21:32:51,370 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 21:32:51,370 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-02 21:32:51,370 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-02 21:32:51,370 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 21:32:51,370 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-02 21:32:51,370 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-02 21:32:51,371 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-02 21:32:51,371 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-02 21:32:51,371 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-02 21:32:51,371 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 21:32:51,371 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-02 21:32:51,371 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-02 21:32:51,371 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-02 21:32:51,371 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 21:32:51,372 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-02 21:32:51,372 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-02 21:32:51,372 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-02 21:32:51,372 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-02 21:32:51,372 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-02 21:32:51,372 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-02 21:32:51,372 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-02 21:32:51,372 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-02 21:32:51,372 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-02 21:32:51,372 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-02 21:32:51,372 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-02 21:32:51,373 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-02 21:32:51,373 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-02 21:32:51,373 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-02 21:32:51,373 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-02 21:32:51,373 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-02 21:32:51,373 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-02 21:32:51,373 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-02 21:32:51,373 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-02 21:32:51,373 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-02 21:32:51,373 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-02 21:32:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-02 21:32:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-02 21:32:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-02 21:32:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-02 21:32:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-02 21:32:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-02 21:32:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-02 21:32:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-02 21:32:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-02 21:32:51,374 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-02 21:32:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-02 21:32:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-02 21:32:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-02 21:32:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-02 21:32:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-02 21:32:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-02 21:32:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-02 21:32:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-02 21:32:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 21:32:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 21:32:51,376 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 21:32:51,376 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 21:32:51,376 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 21:32:51,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 21:32:51,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 21:32:51,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 21:32:51,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 21:32:51,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 21:32:51,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 21:32:51,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 21:32:51,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 21:32:51,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 21:32:51,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 21:32:51,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 21:32:51,620 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 21:32:51,622 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 21:32:51,861 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 21:32:51,911 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 21:32:51,911 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-04-02 21:32:51,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:32:51 BoogieIcfgContainer [2023-04-02 21:32:51,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 21:32:51,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 21:32:51,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 21:32:51,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 21:32:51,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 09:32:50" (1/3) ... [2023-04-02 21:32:51,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da580e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:32:51, skipping insertion in model container [2023-04-02 21:32:51,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:32:51" (2/3) ... [2023-04-02 21:32:51,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da580e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:32:51, skipping insertion in model container [2023-04-02 21:32:51,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:32:51" (3/3) ... [2023-04-02 21:32:51,928 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-simple-white-blue-2.i [2023-04-02 21:32:51,944 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 21:32:51,945 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 21:32:51,995 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 21:32:52,002 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;@3ffbbfc6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 21:32:52,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 21:32:52,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 21:32:52,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 21:32:52,014 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:32:52,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:32:52,015 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:32:52,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:32:52,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1667031889, now seen corresponding path program 1 times [2023-04-02 21:32:52,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:32:52,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184040546] [2023-04-02 21:32:52,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:32:52,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:32:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:32:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:32:52,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:32:52,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184040546] [2023-04-02 21:32:52,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184040546] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:32:52,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:32:52,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 21:32:52,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707977424] [2023-04-02 21:32:52,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:32:52,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 21:32:52,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:32:52,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 21:32:52,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 21:32:52,298 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:32:52,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:32:52,353 INFO L93 Difference]: Finished difference Result 46 states and 67 transitions. [2023-04-02 21:32:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 21:32:52,355 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-02 21:32:52,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:32:52,364 INFO L225 Difference]: With dead ends: 46 [2023-04-02 21:32:52,365 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 21:32:52,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 21:32:52,372 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:32:52,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:32:52,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 21:32:52,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-02 21:32:52,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:32:52,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-04-02 21:32:52,397 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2023-04-02 21:32:52,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:32:52,398 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-04-02 21:32:52,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:32:52,398 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-04-02 21:32:52,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 21:32:52,399 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:32:52,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:32:52,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 21:32:52,399 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:32:52,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:32:52,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1890958784, now seen corresponding path program 1 times [2023-04-02 21:32:52,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:32:52,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417789084] [2023-04-02 21:32:52,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:32:52,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:32:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:32:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:32:52,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:32:52,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417789084] [2023-04-02 21:32:52,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417789084] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:32:52,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:32:52,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 21:32:52,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002663160] [2023-04-02 21:32:52,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:32:52,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 21:32:52,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:32:52,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 21:32:52,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 21:32:52,953 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:32:53,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:32:53,231 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-04-02 21:32:53,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 21:32:53,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-02 21:32:53,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:32:53,235 INFO L225 Difference]: With dead ends: 54 [2023-04-02 21:32:53,235 INFO L226 Difference]: Without dead ends: 52 [2023-04-02 21:32:53,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-04-02 21:32:53,237 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 21:32:53,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 80 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 21:32:53,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-02 21:32:53,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 32. [2023-04-02 21:32:53,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:32:53,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-04-02 21:32:53,245 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 16 [2023-04-02 21:32:53,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:32:53,245 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-04-02 21:32:53,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:32:53,246 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-04-02 21:32:53,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 21:32:53,246 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:32:53,246 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:32:53,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 21:32:53,247 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:32:53,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:32:53,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1062903397, now seen corresponding path program 1 times [2023-04-02 21:32:53,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:32:53,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804226131] [2023-04-02 21:32:53,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:32:53,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:32:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:32:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:32:53,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:32:53,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804226131] [2023-04-02 21:32:53,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804226131] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:32:53,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058655655] [2023-04-02 21:32:53,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:32:53,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:32:53,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:32:53,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:32:53,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 21:32:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:32:53,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-02 21:32:53,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:32:53,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-04-02 21:32:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:32:54,008 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 21:32:54,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058655655] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:32:54,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 21:32:54,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-02 21:32:54,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003780641] [2023-04-02 21:32:54,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:32:54,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 21:32:54,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:32:54,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 21:32:54,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-02 21:32:54,014 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:32:54,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:32:54,136 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2023-04-02 21:32:54,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 21:32:54,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-02 21:32:54,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:32:54,138 INFO L225 Difference]: With dead ends: 49 [2023-04-02 21:32:54,138 INFO L226 Difference]: Without dead ends: 41 [2023-04-02 21:32:54,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-02 21:32:54,140 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:32:54,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 70 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:32:54,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-02 21:32:54,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2023-04-02 21:32:54,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:32:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-04-02 21:32:54,149 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 18 [2023-04-02 21:32:54,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:32:54,149 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-04-02 21:32:54,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:32:54,149 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-04-02 21:32:54,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 21:32:54,150 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:32:54,150 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:32:54,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 21:32:54,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:32:54,358 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:32:54,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:32:54,358 INFO L85 PathProgramCache]: Analyzing trace with hash 315628507, now seen corresponding path program 1 times [2023-04-02 21:32:54,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:32:54,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486471204] [2023-04-02 21:32:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:32:54,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:32:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:32:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:32:55,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:32:55,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486471204] [2023-04-02 21:32:55,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486471204] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:32:55,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834232641] [2023-04-02 21:32:55,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:32:55,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:32:55,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:32:55,073 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:32:55,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 21:32:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:32:55,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 57 conjunts are in the unsatisfiable core [2023-04-02 21:32:55,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:32:55,283 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 [2023-04-02 21:32:55,289 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 21:32:55,359 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2023-04-02 21:32:55,370 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2023-04-02 21:32:55,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 39 [2023-04-02 21:32:55,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:32:55,399 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2023-04-02 21:32:55,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 67 [2023-04-02 21:32:55,428 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 21:32:55,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-02 21:32:55,451 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 37 treesize of output 31 [2023-04-02 21:32:55,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-02 21:32:55,587 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-04-02 21:32:55,587 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 15 treesize of output 15 [2023-04-02 21:32:55,594 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 18 treesize of output 20 [2023-04-02 21:32:55,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-02 21:32:55,681 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 27 treesize of output 15 [2023-04-02 21:32:55,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-04-02 21:32:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:32:55,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:32:55,768 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_main_~head~0.base_11 Int) (v_ArrVal_329 (Array Int Int))) (or (not (= (select (select (store |c_#memory_int| v_main_~head~0.base_11 v_ArrVal_329) c_main_~head~0.base) (+ c_main_~head~0.offset 8)) 1)) (not (= (select |c_#valid| v_main_~head~0.base_11) 0)))) is different from false [2023-04-02 21:32:55,809 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:32:55,809 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2023-04-02 21:32:55,816 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 103 treesize of output 79 [2023-04-02 21:32:55,820 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 63 treesize of output 61 [2023-04-02 21:32:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-04-02 21:32:56,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834232641] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:32:56,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2133916314] [2023-04-02 21:32:56,029 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 21:32:56,029 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:32:56,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:32:56,037 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:32:56,038 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:32:56,087 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:32:56,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:32:56,387 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:32:57,853 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '559#(and (<= 1 |#StackHeapBarrier|) (not (= main_~x~0.base 0)) (= main_~head~0.offset 0) (exists ((|v_#memory_$Pointer$.offset_55| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_17| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.offset_55| main_~head~0.base (store (select |v_#memory_$Pointer$.offset_55| main_~head~0.base) 8 (select (select |v_#memory_$Pointer$.offset_17| main_~head~0.base) 8))) |v_#memory_$Pointer$.offset_17|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_17| main_~head~0.base (store (store (select |v_#memory_$Pointer$.offset_17| main_~head~0.base) 0 0) 4 0))))) (= (select (select |#memory_int| main_~x~0.base) (+ main_~x~0.offset 8)) 1) (= main_~x~0.offset (select (select |#memory_$Pointer$.offset| main_~head~0.base) 0)) (< main_~head~0.base |#StackHeapBarrier|) (exists ((|v_#length_24| (Array Int Int))) (= (store |v_#length_24| main_~head~0.base 12) |#length|)) (exists ((|v_#memory_$Pointer$.base_55| (Array Int (Array Int Int))) (v_main_~head~0.base_13 Int) (|v_#memory_$Pointer$.base_17| (Array Int (Array Int Int)))) (and (<= (+ v_main_~head~0.base_13 1) |#StackHeapBarrier|) (= (store |v_#memory_$Pointer$.base_17| main_~head~0.base (store (store (select |v_#memory_$Pointer$.base_17| main_~head~0.base) 0 v_main_~head~0.base_13) 4 0)) |#memory_$Pointer$.base|) (= (store |v_#memory_$Pointer$.base_55| main_~head~0.base (store (select |v_#memory_$Pointer$.base_55| main_~head~0.base) 8 (select (select |v_#memory_$Pointer$.base_17| main_~head~0.base) 8))) |v_#memory_$Pointer$.base_17|))) (not (= main_~head~0.base 0)) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.base| main_~head~0.base) 0) main_~x~0.base) (exists ((|v_#valid_28| (Array Int Int))) (and (= (store |v_#valid_28| main_~head~0.base 1) |#valid|) (= (select |v_#valid_28| main_~head~0.base) 0))) (exists ((|v_#memory_int_20| (Array Int (Array Int Int))) (|v_#memory_int_83| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_20| main_~head~0.base (store (select |v_#memory_int_20| main_~head~0.base) 4 (select (select |#memory_int| main_~head~0.base) 4)))) (= |v_#memory_int_20| (store |v_#memory_int_83| main_~head~0.base (store (store (select |v_#memory_int_83| main_~head~0.base) 8 1) 0 (select (select |v_#memory_int_20| main_~head~0.base) 0)))))) (= |#NULL.base| 0))' at error location [2023-04-02 21:32:57,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:32:57,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:32:57,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-04-02 21:32:57,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978088367] [2023-04-02 21:32:57,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:32:57,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 21:32:57,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:32:57,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 21:32:57,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=721, Unknown=1, NotChecked=54, Total=870 [2023-04-02 21:32:57,861 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:32:58,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:32:58,419 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2023-04-02 21:32:58,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 21:32:58,420 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-02 21:32:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:32:58,421 INFO L225 Difference]: With dead ends: 71 [2023-04-02 21:32:58,421 INFO L226 Difference]: Without dead ends: 69 [2023-04-02 21:32:58,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=170, Invalid=1093, Unknown=1, NotChecked=68, Total=1332 [2023-04-02 21:32:58,422 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 148 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 21:32:58,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 128 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 151 Invalid, 0 Unknown, 63 Unchecked, 0.3s Time] [2023-04-02 21:32:58,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-04-02 21:32:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2023-04-02 21:32:58,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:32:58,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2023-04-02 21:32:58,429 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 18 [2023-04-02 21:32:58,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:32:58,430 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2023-04-02 21:32:58,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:32:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2023-04-02 21:32:58,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 21:32:58,430 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:32:58,431 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:32:58,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 21:32:58,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-02 21:32:58,637 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:32:58,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:32:58,637 INFO L85 PathProgramCache]: Analyzing trace with hash -744009481, now seen corresponding path program 1 times [2023-04-02 21:32:58,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:32:58,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911849109] [2023-04-02 21:32:58,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:32:58,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:32:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:32:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:32:58,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:32:58,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911849109] [2023-04-02 21:32:58,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911849109] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:32:58,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117375972] [2023-04-02 21:32:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:32:58,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:32:58,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:32:58,901 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:32:58,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 21:32:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:32:59,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-02 21:32:59,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:32:59,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-04-02 21:32:59,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-04-02 21:32:59,074 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 21:32:59,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 12 treesize of output 17 [2023-04-02 21:32:59,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:32:59,129 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 22 treesize of output 24 [2023-04-02 21:32:59,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:32:59,134 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 16 treesize of output 18 [2023-04-02 21:32:59,146 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-04-02 21:32:59,146 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 15 treesize of output 15 [2023-04-02 21:32:59,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 15 [2023-04-02 21:32:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:32:59,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:32:59,451 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:32:59,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 40 [2023-04-02 21:32:59,459 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:32:59,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2023-04-02 21:32:59,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-02 21:32:59,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-02 21:32:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:32:59,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117375972] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 21:32:59,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 21:32:59,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 8] total 16 [2023-04-02 21:32:59,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374665046] [2023-04-02 21:32:59,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:32:59,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 21:32:59,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:32:59,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 21:32:59,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-04-02 21:32:59,703 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:01,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-02 21:33:03,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-02 21:33:05,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-02 21:33:06,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:33:06,434 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2023-04-02 21:33:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 21:33:06,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-02 21:33:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:33:06,435 INFO L225 Difference]: With dead ends: 65 [2023-04-02 21:33:06,435 INFO L226 Difference]: Without dead ends: 52 [2023-04-02 21:33:06,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2023-04-02 21:33:06,436 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 62 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 11 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-04-02 21:33:06,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 89 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 93 Invalid, 6 Unknown, 0 Unchecked, 6.4s Time] [2023-04-02 21:33:06,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-02 21:33:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2023-04-02 21:33:06,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:06,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2023-04-02 21:33:06,443 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 19 [2023-04-02 21:33:06,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:33:06,443 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2023-04-02 21:33:06,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:06,443 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2023-04-02 21:33:06,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 21:33:06,444 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:33:06,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:33:06,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 21:33:06,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:33:06,645 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:33:06,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:33:06,645 INFO L85 PathProgramCache]: Analyzing trace with hash 867009139, now seen corresponding path program 1 times [2023-04-02 21:33:06,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:33:06,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123476551] [2023-04-02 21:33:06,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:33:06,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:33:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:33:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:33:06,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:33:06,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123476551] [2023-04-02 21:33:06,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123476551] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:33:06,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:33:06,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 21:33:06,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577950086] [2023-04-02 21:33:06,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:33:06,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 21:33:06,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:33:06,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 21:33:06,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 21:33:06,935 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:07,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:33:07,105 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2023-04-02 21:33:07,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 21:33:07,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-02 21:33:07,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:33:07,106 INFO L225 Difference]: With dead ends: 73 [2023-04-02 21:33:07,106 INFO L226 Difference]: Without dead ends: 66 [2023-04-02 21:33:07,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 21:33:07,107 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 53 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:33:07,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 72 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:33:07,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-02 21:33:07,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2023-04-02 21:33:07,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:07,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2023-04-02 21:33:07,115 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 19 [2023-04-02 21:33:07,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:33:07,116 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2023-04-02 21:33:07,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:07,116 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2023-04-02 21:33:07,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 21:33:07,117 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:33:07,117 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:33:07,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 21:33:07,117 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:33:07,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:33:07,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1475255768, now seen corresponding path program 1 times [2023-04-02 21:33:07,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:33:07,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131789299] [2023-04-02 21:33:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:33:07,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:33:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:33:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:33:07,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:33:07,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131789299] [2023-04-02 21:33:07,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131789299] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:33:07,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:33:07,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 21:33:07,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307229929] [2023-04-02 21:33:07,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:33:07,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 21:33:07,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:33:07,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 21:33:07,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 21:33:07,382 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:07,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:33:07,648 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2023-04-02 21:33:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 21:33:07,648 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-02 21:33:07,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:33:07,649 INFO L225 Difference]: With dead ends: 66 [2023-04-02 21:33:07,649 INFO L226 Difference]: Without dead ends: 54 [2023-04-02 21:33:07,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-04-02 21:33:07,650 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 21:33:07,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 75 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 21:33:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-02 21:33:07,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2023-04-02 21:33:07,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:07,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2023-04-02 21:33:07,656 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 21 [2023-04-02 21:33:07,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:33:07,656 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2023-04-02 21:33:07,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:07,657 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2023-04-02 21:33:07,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 21:33:07,657 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:33:07,657 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:33:07,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 21:33:07,658 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:33:07,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:33:07,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1223511420, now seen corresponding path program 1 times [2023-04-02 21:33:07,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:33:07,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733003155] [2023-04-02 21:33:07,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:33:07,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:33:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:33:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:33:08,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:33:08,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733003155] [2023-04-02 21:33:08,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733003155] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:33:08,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235249600] [2023-04-02 21:33:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:33:08,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:33:08,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:33:08,629 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:33:08,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 21:33:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:33:08,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 91 conjunts are in the unsatisfiable core [2023-04-02 21:33:08,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:33:08,820 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 21:33:08,824 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 [2023-04-02 21:33:08,874 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 100 [2023-04-02 21:33:08,881 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 114 [2023-04-02 21:33:08,931 INFO L321 Elim1Store]: treesize reduction 67, result has 20.2 percent of original size [2023-04-02 21:33:08,932 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 268 treesize of output 269 [2023-04-02 21:33:08,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:33:09,023 INFO L321 Elim1Store]: treesize reduction 344, result has 14.0 percent of original size [2023-04-02 21:33:09,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 230 treesize of output 373 [2023-04-02 21:33:09,037 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 164 [2023-04-02 21:33:09,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:33:09,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:33:09,071 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-04-02 21:33:09,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 154 [2023-04-02 21:33:09,089 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 342 treesize of output 294 [2023-04-02 21:33:09,126 INFO L321 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2023-04-02 21:33:09,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2023-04-02 21:33:09,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 51 treesize of output 49 [2023-04-02 21:33:09,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 25 treesize of output 30 [2023-04-02 21:33:09,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no need to replace index [2023-04-02 21:33:09,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1720537746] [2023-04-02 21:33:09,296 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 21:33:09,296 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:33:09,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:33:09,296 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:33:09,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:33:09,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 21:33:09,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:33:09,507 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Script currently locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@28a2a927 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.assertScriptNotLocked(ManagedScript.java:109) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateLight(PartialQuantifierElimination.java:109) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$TermDomainOperationProviderWithLightElimination.newQuantifier(SymbolicTools.java:284) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$TermDomainOperationProviderWithLightElimination.projectExistentially(SymbolicTools.java:270) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-04-02 21:33:09,510 INFO L158 Benchmark]: Toolchain (without parser) took 18658.16ms. Allocated memory was 281.0MB in the beginning and 408.9MB in the end (delta: 127.9MB). Free memory was 236.7MB in the beginning and 172.5MB in the end (delta: 64.2MB). Peak memory consumption was 194.0MB. Max. memory is 8.0GB. [2023-04-02 21:33:09,511 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 217.1MB. Free memory is still 171.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 21:33:09,511 INFO L158 Benchmark]: CACSL2BoogieTranslator took 374.46ms. Allocated memory is still 281.0MB. Free memory was 236.7MB in the beginning and 219.3MB in the end (delta: 17.4MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-04-02 21:33:09,511 INFO L158 Benchmark]: Boogie Preprocessor took 69.45ms. Allocated memory is still 281.0MB. Free memory was 219.3MB in the beginning and 216.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-02 21:33:09,511 INFO L158 Benchmark]: RCFGBuilder took 612.58ms. Allocated memory is still 281.0MB. Free memory was 216.2MB in the beginning and 188.3MB in the end (delta: 27.9MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. [2023-04-02 21:33:09,512 INFO L158 Benchmark]: TraceAbstraction took 17594.75ms. Allocated memory was 281.0MB in the beginning and 408.9MB in the end (delta: 127.9MB). Free memory was 187.5MB in the beginning and 172.5MB in the end (delta: 14.9MB). Peak memory consumption was 144.7MB. Max. memory is 8.0GB. [2023-04-02 21:33:09,513 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 217.1MB. Free memory is still 171.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 374.46ms. Allocated memory is still 281.0MB. Free memory was 236.7MB in the beginning and 219.3MB in the end (delta: 17.4MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 69.45ms. Allocated memory is still 281.0MB. Free memory was 219.3MB in the beginning and 216.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 612.58ms. Allocated memory is still 281.0MB. Free memory was 216.2MB in the beginning and 188.3MB in the end (delta: 27.9MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. * TraceAbstraction took 17594.75ms. Allocated memory was 281.0MB in the beginning and 408.9MB in the end (delta: 127.9MB). Free memory was 187.5MB in the beginning and 172.5MB in the end (delta: 14.9MB). Peak memory consumption was 144.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Script currently locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@28a2a927 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Script currently locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@28a2a927: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.assertScriptNotLocked(ManagedScript.java:109) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2023-04-02 21:33:09,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...