/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/loop-lit/gj2007.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:06:32,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:06:32,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:06:32,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:06:32,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:06:32,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:06:32,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:06:32,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:06:32,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:06:32,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:06:32,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:06:32,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:06:32,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:06:32,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:06:32,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:06:32,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:06:32,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:06:32,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:06:32,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:06:32,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:06:32,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:06:32,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:06:32,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:06:32,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:06:32,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:06:32,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:06:32,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:06:32,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:06:32,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:06:32,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:06:32,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:06:32,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:06:32,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:06:32,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:06:32,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:06:32,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:06:32,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:06:32,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:06:32,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:06:32,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:06:32,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:06:32,249 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 11:06:32,280 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:06:32,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:06:32,280 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:06:32,281 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:06:32,281 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:06:32,281 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:06:32,282 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:06:32,282 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:06:32,282 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:06:32,282 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:06:32,283 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:06:32,283 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:06:32,283 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:06:32,283 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:06:32,283 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:06:32,283 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:06:32,283 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:06:32,284 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:06:32,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:06:32,284 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:06:32,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:06:32,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:06:32,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:06:32,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:06:32,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:06:32,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:06:32,285 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:06:32,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:06:32,286 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:06:32,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:06:32,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:06:32,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:06:32,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:06:32,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:06:32,287 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:06:32,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:06:32,287 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:06:32,287 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:06:32,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:06:32,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:06:32,287 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:06:32,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:06:32,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:06:32,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:06:32,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:06:32,572 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:06:32,572 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:06:32,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/gj2007.i [2023-04-01 11:06:33,700 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:06:33,895 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:06:33,895 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gj2007.i [2023-04-01 11:06:33,901 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae7a12c61/785d2d1f4c4e4a5e96a0145156905215/FLAGb299776d7 [2023-04-01 11:06:33,913 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae7a12c61/785d2d1f4c4e4a5e96a0145156905215 [2023-04-01 11:06:33,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:06:33,916 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:06:33,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:06:33,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:06:33,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:06:33,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:06:33" (1/1) ... [2023-04-01 11:06:33,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@384dfc46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:33, skipping insertion in model container [2023-04-01 11:06:33,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:06:33" (1/1) ... [2023-04-01 11:06:33,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:06:33,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:06:34,104 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/loop-lit/gj2007.i[895,908] [2023-04-01 11:06:34,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:06:34,130 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:06:34,143 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/loop-lit/gj2007.i[895,908] [2023-04-01 11:06:34,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:06:34,159 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:06:34,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34 WrapperNode [2023-04-01 11:06:34,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:06:34,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:06:34,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:06:34,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:06:34,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (1/1) ... [2023-04-01 11:06:34,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (1/1) ... [2023-04-01 11:06:34,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (1/1) ... [2023-04-01 11:06:34,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (1/1) ... [2023-04-01 11:06:34,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (1/1) ... [2023-04-01 11:06:34,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (1/1) ... [2023-04-01 11:06:34,190 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (1/1) ... [2023-04-01 11:06:34,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (1/1) ... [2023-04-01 11:06:34,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:06:34,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:06:34,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:06:34,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:06:34,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (1/1) ... [2023-04-01 11:06:34,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:06:34,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:06:34,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 11:06:34,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 11:06:34,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:06:34,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:06:34,272 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:06:34,272 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:06:34,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:06:34,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:06:34,273 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:06:34,273 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:06:34,273 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 11:06:34,273 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 11:06:34,273 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:06:34,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:06:34,273 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:06:34,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:06:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:06:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:06:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:06:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:06:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:06:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:06:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:06:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:06:34,342 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:06:34,344 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:06:34,484 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:06:34,514 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:06:34,515 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 11:06:34,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:06:34 BoogieIcfgContainer [2023-04-01 11:06:34,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:06:34,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:06:34,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:06:34,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:06:34,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:06:33" (1/3) ... [2023-04-01 11:06:34,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4001e3a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:06:34, skipping insertion in model container [2023-04-01 11:06:34,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (2/3) ... [2023-04-01 11:06:34,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4001e3a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:06:34, skipping insertion in model container [2023-04-01 11:06:34,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:06:34" (3/3) ... [2023-04-01 11:06:34,524 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007.i [2023-04-01 11:06:34,556 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:06:34,556 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:06:34,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:06:34,631 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;@318d3a46, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:06:34,631 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:06:34,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:06:34,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-01 11:06:34,642 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:06:34,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:06:34,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:06:34,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:06:34,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1852986223, now seen corresponding path program 1 times [2023-04-01 11:06:34,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:06:34,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840912138] [2023-04-01 11:06:34,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:06:34,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:06:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:06:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:06:34,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:06:34,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840912138] [2023-04-01 11:06:34,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840912138] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:06:34,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:06:34,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 11:06:34,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418980752] [2023-04-01 11:06:34,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:06:34,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 11:06:34,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:06:34,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 11:06:34,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:06:34,922 INFO L87 Difference]: Start difference. First operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:06:34,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:06:34,961 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-04-01 11:06:34,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 11:06:34,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-01 11:06:34,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:06:34,972 INFO L225 Difference]: With dead ends: 29 [2023-04-01 11:06:34,972 INFO L226 Difference]: Without dead ends: 12 [2023-04-01 11:06:34,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:06:34,978 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:06:34,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:06:34,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-04-01 11:06:35,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-04-01 11:06:35,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:06:35,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-04-01 11:06:35,006 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2023-04-01 11:06:35,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:06:35,007 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-04-01 11:06:35,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:06:35,007 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-04-01 11:06:35,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 11:06:35,008 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:06:35,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:06:35,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:06:35,009 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:06:35,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:06:35,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1675739901, now seen corresponding path program 1 times [2023-04-01 11:06:35,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:06:35,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325368089] [2023-04-01 11:06:35,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:06:35,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:06:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:06:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:06:35,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:06:35,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325368089] [2023-04-01 11:06:35,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325368089] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:06:35,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601874417] [2023-04-01 11:06:35,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:06:35,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:06:35,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:06:35,088 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:06:35,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 11:06:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:06:35,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 11:06:35,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:06:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:06:35,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:06:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:06:35,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601874417] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:06:35,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1503213922] [2023-04-01 11:06:35,423 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 11:06:35,424 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:06:35,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:06:35,433 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:06:35,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:06:35,583 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 37 for LOIs [2023-04-01 11:06:35,792 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 11:06:35,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:06:35,853 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:06:36,249 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '152#(and (= 2 (select |#length| 1)) (= 9 (select |#length| 2)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:06:36,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:06:36,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:06:36,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 11:06:36,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429299617] [2023-04-01 11:06:36,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:06:36,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:06:36,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:06:36,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:06:36,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-04-01 11:06:36,254 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:06:36,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:06:36,275 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2023-04-01 11:06:36,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:06:36,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 11:06:36,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:06:36,277 INFO L225 Difference]: With dead ends: 20 [2023-04-01 11:06:36,277 INFO L226 Difference]: Without dead ends: 15 [2023-04-01 11:06:36,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-04-01 11:06:36,280 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:06:36,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:06:36,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-04-01 11:06:36,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-04-01 11:06:36,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:06:36,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-04-01 11:06:36,288 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2023-04-01 11:06:36,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:06:36,288 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-04-01 11:06:36,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:06:36,288 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-04-01 11:06:36,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 11:06:36,289 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:06:36,289 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:06:36,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 11:06:36,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:06:36,495 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:06:36,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:06:36,495 INFO L85 PathProgramCache]: Analyzing trace with hash 110675695, now seen corresponding path program 2 times [2023-04-01 11:06:36,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:06:36,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318143560] [2023-04-01 11:06:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:06:36,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:06:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:06:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:06:36,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:06:36,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318143560] [2023-04-01 11:06:36,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318143560] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:06:36,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253317317] [2023-04-01 11:06:36,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:06:36,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:06:36,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:06:36,729 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:06:36,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 11:06:36,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 11:06:36,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:06:36,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 11:06:36,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:06:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:06:36,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:06:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:06:36,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253317317] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:06:36,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567336624] [2023-04-01 11:06:36,970 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 11:06:36,970 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:06:36,971 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:06:36,971 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:06:36,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:06:37,023 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 37 for LOIs [2023-04-01 11:06:37,138 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 11:06:37,155 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:06:37,161 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:06:37,496 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '312#(and (= 2 (select |#length| 1)) (= 9 (select |#length| 2)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:06:37,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:06:37,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:06:37,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-01 11:06:37,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219888621] [2023-04-01 11:06:37,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:06:37,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 11:06:37,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:06:37,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 11:06:37,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-04-01 11:06:37,499 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:06:37,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:06:37,522 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-04-01 11:06:37,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:06:37,523 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-01 11:06:37,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:06:37,524 INFO L225 Difference]: With dead ends: 26 [2023-04-01 11:06:37,524 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 11:06:37,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-04-01 11:06:37,525 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:06:37,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:06:37,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 11:06:37,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 11:06:37,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:06:37,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2023-04-01 11:06:37,529 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2023-04-01 11:06:37,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:06:37,530 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2023-04-01 11:06:37,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:06:37,530 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2023-04-01 11:06:37,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 11:06:37,531 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:06:37,531 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:06:37,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 11:06:37,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 11:06:37,737 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:06:37,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:06:37,737 INFO L85 PathProgramCache]: Analyzing trace with hash -2011583441, now seen corresponding path program 3 times [2023-04-01 11:06:37,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:06:37,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845884299] [2023-04-01 11:06:37,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:06:37,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:06:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:06:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:06:38,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:06:38,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845884299] [2023-04-01 11:06:38,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845884299] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:06:38,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014540584] [2023-04-01 11:06:38,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:06:38,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:06:38,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:06:38,066 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:06:38,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 11:06:38,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 11:06:38,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:06:38,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 11:06:38,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:06:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:06:38,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:06:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:06:38,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014540584] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:06:38,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1673265495] [2023-04-01 11:06:38,450 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 11:06:38,450 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:06:38,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:06:38,451 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:06:38,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:06:38,476 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 37 for LOIs [2023-04-01 11:06:38,541 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 11:06:38,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:06:38,555 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:06:38,933 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '544#(and (= 2 (select |#length| 1)) (= 9 (select |#length| 2)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:06:38,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:06:38,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:06:38,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 11:06:38,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034268024] [2023-04-01 11:06:38,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:06:38,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 11:06:38,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:06:38,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 11:06:38,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=670, Unknown=0, NotChecked=0, Total=992 [2023-04-01 11:06:38,936 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:06:38,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:06:38,975 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2023-04-01 11:06:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 11:06:38,975 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-04-01 11:06:38,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:06:38,978 INFO L225 Difference]: With dead ends: 38 [2023-04-01 11:06:38,978 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 11:06:38,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=322, Invalid=670, Unknown=0, NotChecked=0, Total=992 [2023-04-01 11:06:38,979 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:06:38,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:06:38,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 11:06:38,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-01 11:06:38,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:06:38,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2023-04-01 11:06:38,988 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2023-04-01 11:06:38,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:06:38,988 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2023-04-01 11:06:38,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:06:38,988 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2023-04-01 11:06:38,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 11:06:38,989 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:06:38,989 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:06:38,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 11:06:39,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:06:39,190 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:06:39,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:06:39,191 INFO L85 PathProgramCache]: Analyzing trace with hash 758949551, now seen corresponding path program 4 times [2023-04-01 11:06:39,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:06:39,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648954599] [2023-04-01 11:06:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:06:39,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:06:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:06:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:06:40,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:06:40,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648954599] [2023-04-01 11:06:40,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648954599] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:06:40,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000665563] [2023-04-01 11:06:40,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 11:06:40,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:06:40,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:06:40,014 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:06:40,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 11:06:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:06:40,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 11:06:40,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:06:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:06:40,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:06:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:06:41,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000665563] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:06:41,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [121460827] [2023-04-01 11:06:41,119 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 11:06:41,119 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:06:41,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:06:41,120 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:06:41,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:06:41,153 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 37 for LOIs [2023-04-01 11:06:41,228 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 11:06:41,240 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:06:41,243 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:06:41,597 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '920#(and (= 2 (select |#length| 1)) (= 9 (select |#length| 2)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:06:41,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:06:41,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:06:41,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-01 11:06:41,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104232803] [2023-04-01 11:06:41,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:06:41,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-01 11:06:41,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:06:41,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-01 11:06:41,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1198, Invalid=1882, Unknown=0, NotChecked=0, Total=3080 [2023-04-01 11:06:41,601 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:06:41,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:06:41,675 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2023-04-01 11:06:41,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-01 11:06:41,676 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2023-04-01 11:06:41,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:06:41,678 INFO L225 Difference]: With dead ends: 62 [2023-04-01 11:06:41,678 INFO L226 Difference]: Without dead ends: 57 [2023-04-01 11:06:41,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1198, Invalid=1882, Unknown=0, NotChecked=0, Total=3080 [2023-04-01 11:06:41,680 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:06:41,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:06:41,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-01 11:06:41,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-04-01 11:06:41,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:06:41,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2023-04-01 11:06:41,703 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2023-04-01 11:06:41,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:06:41,703 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2023-04-01 11:06:41,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:06:41,703 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2023-04-01 11:06:41,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 11:06:41,704 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:06:41,704 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:06:41,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 11:06:41,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:06:41,909 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:06:41,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:06:41,909 INFO L85 PathProgramCache]: Analyzing trace with hash -2018026577, now seen corresponding path program 5 times [2023-04-01 11:06:41,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:06:41,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162838020] [2023-04-01 11:06:41,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:06:41,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:06:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:06:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:06:44,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:06:44,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162838020] [2023-04-01 11:06:44,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162838020] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:06:44,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531181851] [2023-04-01 11:06:44,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:06:44,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:06:44,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:06:44,396 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:06:44,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 11:06:44,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-04-01 11:06:44,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:06:44,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 11:06:44,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:06:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:06:44,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:06:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:06:47,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531181851] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:06:47,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1879426210] [2023-04-01 11:06:47,658 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 11:06:47,658 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:06:47,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:06:47,659 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:06:47,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:06:47,686 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 37 for LOIs [2023-04-01 11:06:47,774 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 11:06:47,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:06:47,792 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:06:48,206 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1584#(and (= 2 (select |#length| 1)) (= 9 (select |#length| 2)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:06:48,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:06:48,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:06:48,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2023-04-01 11:06:48,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996965368] [2023-04-01 11:06:48,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:06:48,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-04-01 11:06:48,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:06:48,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-04-01 11:06:48,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4678, Invalid=6034, Unknown=0, NotChecked=0, Total=10712 [2023-04-01 11:06:48,215 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 97 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:06:48,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:06:48,342 INFO L93 Difference]: Finished difference Result 110 states and 157 transitions. [2023-04-01 11:06:48,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-04-01 11:06:48,342 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-01 11:06:48,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:06:48,343 INFO L225 Difference]: With dead ends: 110 [2023-04-01 11:06:48,343 INFO L226 Difference]: Without dead ends: 105 [2023-04-01 11:06:48,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4678, Invalid=6034, Unknown=0, NotChecked=0, Total=10712 [2023-04-01 11:06:48,347 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:06:48,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:06:48,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-04-01 11:06:48,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-04-01 11:06:48,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:06:48,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2023-04-01 11:06:48,359 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 56 [2023-04-01 11:06:48,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:06:48,360 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2023-04-01 11:06:48,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:06:48,360 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2023-04-01 11:06:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-01 11:06:48,362 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:06:48,362 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:06:48,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 11:06:48,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:06:48,569 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:06:48,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:06:48,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1023425105, now seen corresponding path program 6 times [2023-04-01 11:06:48,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:06:48,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829599695] [2023-04-01 11:06:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:06:48,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:06:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:06:57,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:06:57,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:06:57,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829599695] [2023-04-01 11:06:57,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829599695] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:06:57,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174110085] [2023-04-01 11:06:57,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:06:57,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:06:57,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:06:57,454 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:06:57,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 11:06:57,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 11:06:57,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:06:57,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 96 conjunts are in the unsatisfiable core [2023-04-01 11:06:57,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:07:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:07:06,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:07:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:07:07,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174110085] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:07:07,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1344793256] [2023-04-01 11:07:07,976 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 11:07:07,977 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:07:07,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:07:07,977 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:07:07,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:07:07,998 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 37 for LOIs [2023-04-01 11:07:08,054 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 11:07:08,066 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:07:08,069 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:07:08,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2827#(and (= 2 (select |#length| 1)) (= 9 (select |#length| 2)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:07:08,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:07:08,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:07:08,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 196 [2023-04-01 11:07:08,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432582935] [2023-04-01 11:07:08,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:07:08,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2023-04-01 11:07:08,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:07:08,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2023-04-01 11:07:08,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10390, Invalid=30616, Unknown=0, NotChecked=0, Total=41006 [2023-04-01 11:07:08,991 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 196 states, 196 states have (on average 1.030612244897959) internal successors, (202), 196 states have internal predecessors, (202), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:07:10,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:07:10,970 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2023-04-01 11:07:10,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-04-01 11:07:10,971 INFO L78 Accepts]: Start accepts. Automaton has has 196 states, 196 states have (on average 1.030612244897959) internal successors, (202), 196 states have internal predecessors, (202), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2023-04-01 11:07:10,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:07:10,972 INFO L225 Difference]: With dead ends: 116 [2023-04-01 11:07:10,973 INFO L226 Difference]: Without dead ends: 111 [2023-04-01 11:07:10,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2521 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=10390, Invalid=30616, Unknown=0, NotChecked=0, Total=41006 [2023-04-01 11:07:10,976 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 5292 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 11:07:10,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 5292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5292 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 11:07:10,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-01 11:07:10,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2023-04-01 11:07:10,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:07:10,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2023-04-01 11:07:10,987 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 104 [2023-04-01 11:07:10,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:07:10,988 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2023-04-01 11:07:10,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 196 states, 196 states have (on average 1.030612244897959) internal successors, (202), 196 states have internal predecessors, (202), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:07:10,988 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2023-04-01 11:07:10,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-01 11:07:10,989 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:07:10,990 INFO L195 NwaCegarLoop]: trace histogram [100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:07:10,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 11:07:11,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:07:11,197 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:07:11,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:07:11,197 INFO L85 PathProgramCache]: Analyzing trace with hash -76113169, now seen corresponding path program 7 times [2023-04-01 11:07:11,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:07:11,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252825308] [2023-04-01 11:07:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:07:11,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:07:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:07:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:07:22,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:07:22,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252825308] [2023-04-01 11:07:22,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252825308] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:07:22,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453980432] [2023-04-01 11:07:22,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 11:07:22,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:07:22,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:07:22,681 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:07:22,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 11:07:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:07:22,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 110 conjunts are in the unsatisfiable core [2023-04-01 11:07:22,783 INFO L285 TraceCheckSpWp]: Computing forward predicates...