/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-fpi/s5if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:05:17,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:05:17,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:05:17,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:05:17,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:05:17,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:05:17,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:05:17,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:05:17,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:05:17,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:05:17,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:05:17,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:05:17,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:05:17,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:05:17,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:05:17,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:05:17,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:05:17,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:05:17,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:05:17,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:05:17,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:05:17,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:05:17,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:05:17,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:05:17,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:05:17,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:05:17,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:05:17,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:05:17,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:05:17,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:05:17,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:05:17,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:05:17,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:05:17,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:05:17,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:05:17,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:05:17,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:05:17,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:05:17,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:05:17,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:05:17,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:05:17,366 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 03:05:17,395 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:05:17,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:05:17,396 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:05:17,396 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:05:17,397 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:05:17,397 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:05:17,398 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:05:17,398 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:05:17,398 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:05:17,398 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:05:17,399 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:05:17,399 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:05:17,399 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:05:17,399 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:05:17,399 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:05:17,399 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:05:17,400 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:05:17,400 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:05:17,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:05:17,401 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:05:17,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:05:17,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:05:17,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:05:17,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:05:17,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:05:17,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:05:17,402 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:05:17,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:05:17,402 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:05:17,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:05:17,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:05:17,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:05:17,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:05:17,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:05:17,403 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:05:17,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:05:17,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:05:17,403 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:05:17,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:05:17,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:05:17,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:05:17,403 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:05:17,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:05:17,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:05:17,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:05:17,700 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:05:17,701 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:05:17,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s5if.c [2023-04-01 03:05:18,756 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:05:18,932 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:05:18,932 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s5if.c [2023-04-01 03:05:18,936 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/623077cac/7a8a0e58efcb4f6c867d46735c026b08/FLAG371d58d3c [2023-04-01 03:05:18,948 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/623077cac/7a8a0e58efcb4f6c867d46735c026b08 [2023-04-01 03:05:18,950 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:05:18,952 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:05:18,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:05:18,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:05:18,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:05:18,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:05:18" (1/1) ... [2023-04-01 03:05:18,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@773c5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:05:18, skipping insertion in model container [2023-04-01 03:05:18,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:05:18" (1/1) ... [2023-04-01 03:05:18,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:05:18,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:05:19,075 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s5if.c[587,600] [2023-04-01 03:05:19,092 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:05:19,099 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:05:19,108 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s5if.c[587,600] [2023-04-01 03:05:19,113 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:05:19,130 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:05:19,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:05:19 WrapperNode [2023-04-01 03:05:19,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:05:19,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:05:19,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:05:19,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:05:19,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:05:19" (1/1) ... [2023-04-01 03:05:19,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:05:19" (1/1) ... [2023-04-01 03:05:19,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:05:19" (1/1) ... [2023-04-01 03:05:19,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:05:19" (1/1) ... [2023-04-01 03:05:19,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:05:19" (1/1) ... [2023-04-01 03:05:19,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:05:19" (1/1) ... [2023-04-01 03:05:19,186 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:05:19" (1/1) ... [2023-04-01 03:05:19,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:05:19" (1/1) ... [2023-04-01 03:05:19,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:05:19,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:05:19,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:05:19,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:05:19,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:05:19" (1/1) ... [2023-04-01 03:05:19,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:05:19,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:19,229 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 03:05:19,231 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 03:05:19,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:05:19,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:05:19,273 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:05:19,274 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 03:05:19,274 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 03:05:19,274 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:05:19,274 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:05:19,274 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:05:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:05:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:05:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 03:05:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 03:05:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:05:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 03:05:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:05:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 03:05:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 03:05:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:05:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:05:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:05:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:05:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:05:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:05:19,366 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:05:19,368 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:05:19,517 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:05:19,561 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:05:19,562 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 03:05:19,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:05:19 BoogieIcfgContainer [2023-04-01 03:05:19,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:05:19,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:05:19,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:05:19,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:05:19,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:05:18" (1/3) ... [2023-04-01 03:05:19,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d52db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:05:19, skipping insertion in model container [2023-04-01 03:05:19,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:05:19" (2/3) ... [2023-04-01 03:05:19,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d52db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:05:19, skipping insertion in model container [2023-04-01 03:05:19,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:05:19" (3/3) ... [2023-04-01 03:05:19,575 INFO L112 eAbstractionObserver]: Analyzing ICFG s5if.c [2023-04-01 03:05:19,589 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:05:19,589 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:05:19,629 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:05:19,634 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;@753c3cc1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:05:19,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:05:19,638 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 03:05:19,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 03:05:19,643 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:19,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:19,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:19,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:19,648 INFO L85 PathProgramCache]: Analyzing trace with hash 2049730117, now seen corresponding path program 1 times [2023-04-01 03:05:19,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:19,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438463716] [2023-04-01 03:05:19,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:19,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:05:19,911 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 03:05:19,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:19,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438463716] [2023-04-01 03:05:19,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438463716] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:05:19,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:05:19,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 03:05:19,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080643003] [2023-04-01 03:05:19,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:05:19,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 03:05:19,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:19,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 03:05:19,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 03:05:19,943 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:20,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:05:20,022 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-04-01 03:05:20,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 03:05:20,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-04-01 03:05:20,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:05:20,029 INFO L225 Difference]: With dead ends: 43 [2023-04-01 03:05:20,029 INFO L226 Difference]: Without dead ends: 19 [2023-04-01 03:05:20,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 03:05:20,035 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:05:20,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:05:20,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-01 03:05:20,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-01 03:05:20,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:20,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-04-01 03:05:20,073 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2023-04-01 03:05:20,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:20,073 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-04-01 03:05:20,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:20,074 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-04-01 03:05:20,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 03:05:20,074 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:20,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:20,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:05:20,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:20,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:20,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1910355142, now seen corresponding path program 1 times [2023-04-01 03:05:20,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:20,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642305312] [2023-04-01 03:05:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:20,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:20,125 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:05:20,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776108481] [2023-04-01 03:05:20,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:20,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:20,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:20,131 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 03:05:20,133 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 03:05:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:05:20,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-01 03:05:20,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:20,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 03:05:20,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:05:20,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 03:05:20,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:05:20,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-04-01 03:05:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:20,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:20,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-04-01 03:05:20,927 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 03:05:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:21,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:21,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642305312] [2023-04-01 03:05:21,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:05:21,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776108481] [2023-04-01 03:05:21,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776108481] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:21,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1583230810] [2023-04-01 03:05:21,039 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:05:21,039 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:21,042 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:21,047 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:21,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:21,135 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:21,443 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:05:21,475 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:21,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:21,495 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:22,221 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '246#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_1| Int)) (and (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_1|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_1|) (not (= (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_1|) 0) (* 5 ~N~0))) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_1|)) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_1|))) (= |#NULL.base| 0))' at error location [2023-04-01 03:05:22,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:22,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:05:22,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-04-01 03:05:22,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936787436] [2023-04-01 03:05:22,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:22,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 03:05:22,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:22,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 03:05:22,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 03:05:22,226 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 21 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:05:22,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:05:22,463 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-04-01 03:05:22,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 03:05:22,463 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2023-04-01 03:05:22,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:05:22,464 INFO L225 Difference]: With dead ends: 27 [2023-04-01 03:05:22,464 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 03:05:22,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=190, Invalid=1292, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 03:05:22,466 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:05:22,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 52 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:05:22,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 03:05:22,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2023-04-01 03:05:22,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:22,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-01 03:05:22,471 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2023-04-01 03:05:22,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:22,472 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-01 03:05:22,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:05:22,472 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-01 03:05:22,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 03:05:22,472 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:22,472 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:22,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 03:05:22,683 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 03:05:22,684 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:22,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:22,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1034670718, now seen corresponding path program 2 times [2023-04-01 03:05:22,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:22,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542625014] [2023-04-01 03:05:22,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:22,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:22,713 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:05:22,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409741168] [2023-04-01 03:05:22,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:05:22,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:22,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:22,726 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 03:05:22,728 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 03:05:22,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 03:05:22,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:05:22,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:05:22,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:22,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:22,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:22,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542625014] [2023-04-01 03:05:22,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:05:22,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409741168] [2023-04-01 03:05:22,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409741168] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:22,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [746238911] [2023-04-01 03:05:22,853 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:05:22,853 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:22,854 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:22,854 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:22,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:22,890 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:23,023 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:05:23,037 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:23,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:23,047 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:23,624 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '466#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_2| Int)) (and (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_2|) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_2|) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_2|)) (not (= (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_2|) 0) (* 5 ~N~0))) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_2|)))) (= |#NULL.base| 0))' at error location [2023-04-01 03:05:23,625 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:23,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:05:23,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-04-01 03:05:23,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95346941] [2023-04-01 03:05:23,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:23,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 03:05:23,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:23,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 03:05:23,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-04-01 03:05:23,627 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:23,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:05:23,701 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2023-04-01 03:05:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:05:23,701 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-04-01 03:05:23,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:05:23,703 INFO L225 Difference]: With dead ends: 30 [2023-04-01 03:05:23,703 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 03:05:23,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2023-04-01 03:05:23,704 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:05:23,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 55 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:05:23,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 03:05:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-04-01 03:05:23,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:23,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-04-01 03:05:23,709 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 19 [2023-04-01 03:05:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:23,709 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-04-01 03:05:23,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:23,709 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-04-01 03:05:23,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 03:05:23,709 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:23,709 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:23,718 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 03:05:23,916 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 03:05:23,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:23,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:23,917 INFO L85 PathProgramCache]: Analyzing trace with hash -2078488509, now seen corresponding path program 3 times [2023-04-01 03:05:23,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:23,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242842993] [2023-04-01 03:05:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:23,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:23,930 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:05:23,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557519646] [2023-04-01 03:05:23,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:05:23,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:23,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:23,932 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 03:05:23,951 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 03:05:24,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:05:24,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:05:24,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:05:24,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:24,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:24,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:24,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242842993] [2023-04-01 03:05:24,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:05:24,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557519646] [2023-04-01 03:05:24,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557519646] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:24,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1840361223] [2023-04-01 03:05:24,063 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:05:24,063 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:24,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:24,064 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:24,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:24,097 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:24,218 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:05:24,232 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:24,235 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:24,241 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:24,735 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '689#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_3| Int)) (and (not (= (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_3|) 0) (* 5 ~N~0))) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_3|)) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_3|) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_3|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_3|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:05:24,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:24,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:05:24,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 03:05:24,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934495111] [2023-04-01 03:05:24,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:24,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 03:05:24,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:24,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 03:05:24,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-04-01 03:05:24,738 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:05:24,826 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2023-04-01 03:05:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:05:24,827 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-04-01 03:05:24,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:05:24,827 INFO L225 Difference]: With dead ends: 26 [2023-04-01 03:05:24,827 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 03:05:24,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2023-04-01 03:05:24,828 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:05:24,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:05:24,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 03:05:24,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 03:05:24,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:24,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-04-01 03:05:24,833 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2023-04-01 03:05:24,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:24,833 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-04-01 03:05:24,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:24,833 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-04-01 03:05:24,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 03:05:24,834 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:24,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:24,848 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 03:05:25,034 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 03:05:25,035 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:25,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:25,035 INFO L85 PathProgramCache]: Analyzing trace with hash -134772315, now seen corresponding path program 4 times [2023-04-01 03:05:25,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:25,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246100060] [2023-04-01 03:05:25,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:25,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:25,051 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:05:25,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161725038] [2023-04-01 03:05:25,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:05:25,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:25,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:25,053 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 03:05:25,069 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 03:05:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:05:25,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 03:05:25,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:25,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 03:05:25,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:05:25,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 03:05:25,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:05:25,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 03:05:25,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:05:25,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:05:25,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:05:25,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:05:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:25,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:25,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-04-01 03:05:25,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-04-01 03:05:25,876 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 03:05:25,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:25,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:25,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246100060] [2023-04-01 03:05:25,898 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:05:25,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161725038] [2023-04-01 03:05:25,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161725038] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:25,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1673377399] [2023-04-01 03:05:25,900 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:05:25,900 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:25,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:25,901 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:25,901 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:25,929 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:26,050 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:05:26,062 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:26,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:26,071 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:26,817 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '925#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_4| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_4|) (not (= (* 5 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_4|) 0))) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_4|)) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_4|)) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_4|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:05:26,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:26,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:05:26,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2023-04-01 03:05:26,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881872784] [2023-04-01 03:05:26,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:26,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 03:05:26,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:26,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 03:05:26,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 03:05:26,821 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 22 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:05:27,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:05:27,718 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2023-04-01 03:05:27,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 03:05:27,719 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2023-04-01 03:05:27,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:05:27,719 INFO L225 Difference]: With dead ends: 32 [2023-04-01 03:05:27,719 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 03:05:27,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=164, Invalid=1642, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 03:05:27,721 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:05:27,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 92 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:05:27,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 03:05:27,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-04-01 03:05:27,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:27,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-04-01 03:05:27,726 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2023-04-01 03:05:27,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:27,726 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-04-01 03:05:27,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:05:27,726 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-04-01 03:05:27,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 03:05:27,726 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:27,726 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:27,732 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 03:05:27,927 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 03:05:27,927 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:27,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:27,927 INFO L85 PathProgramCache]: Analyzing trace with hash -9112445, now seen corresponding path program 5 times [2023-04-01 03:05:27,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:27,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067432155] [2023-04-01 03:05:27,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:27,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:27,944 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:05:27,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69702572] [2023-04-01 03:05:27,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:05:27,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:27,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:27,946 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 03:05:27,948 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 03:05:28,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 03:05:28,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:05:28,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 03:05:28,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:28,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:28,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:28,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067432155] [2023-04-01 03:05:28,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:05:28,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69702572] [2023-04-01 03:05:28,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69702572] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:28,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1824093655] [2023-04-01 03:05:28,122 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:05:28,123 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:28,123 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:28,123 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:28,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:28,158 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:28,283 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:05:28,294 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:28,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:28,300 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:28,738 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1180#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_5| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_5|) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_5|) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_5| |#StackHeapBarrier|)) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_5|)) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_5|)) (not (= (* 5 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_5|) 0))))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:05:28,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:28,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:05:28,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-04-01 03:05:28,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296309480] [2023-04-01 03:05:28,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:28,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 03:05:28,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:28,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 03:05:28,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2023-04-01 03:05:28,741 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:28,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:05:28,830 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2023-04-01 03:05:28,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 03:05:28,831 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-04-01 03:05:28,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:05:28,832 INFO L225 Difference]: With dead ends: 33 [2023-04-01 03:05:28,832 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 03:05:28,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2023-04-01 03:05:28,833 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:05:28,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:05:28,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 03:05:28,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-04-01 03:05:28,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-04-01 03:05:28,847 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 21 [2023-04-01 03:05:28,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:28,847 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-04-01 03:05:28,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-04-01 03:05:28,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 03:05:28,848 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:28,849 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:28,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 03:05:29,053 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 03:05:29,053 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:29,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:29,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1992274402, now seen corresponding path program 6 times [2023-04-01 03:05:29,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:29,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687075242] [2023-04-01 03:05:29,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:29,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:29,066 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:05:29,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019268228] [2023-04-01 03:05:29,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:05:29,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:29,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:29,075 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 03:05:29,075 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 03:05:29,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:05:29,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:05:29,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 03:05:29,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:29,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:29,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:29,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687075242] [2023-04-01 03:05:29,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:05:29,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019268228] [2023-04-01 03:05:29,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019268228] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:29,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1011590491] [2023-04-01 03:05:29,264 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:05:29,264 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:29,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:29,264 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:29,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:29,292 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:29,401 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:05:29,412 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:29,414 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:29,419 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:29,883 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1430#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_6| Int)) (and (not (= (* 5 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_6|) 0))) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_6|)) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_6| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_6|) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_6|) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_6|)))) (= |#NULL.base| 0))' at error location [2023-04-01 03:05:29,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:29,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:05:29,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-01 03:05:29,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368998394] [2023-04-01 03:05:29,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:29,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 03:05:29,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:29,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 03:05:29,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2023-04-01 03:05:29,885 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:29,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:05:29,975 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2023-04-01 03:05:29,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 03:05:29,975 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-04-01 03:05:29,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:05:29,976 INFO L225 Difference]: With dead ends: 28 [2023-04-01 03:05:29,976 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 03:05:29,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2023-04-01 03:05:29,977 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:05:29,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 39 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:05:29,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 03:05:29,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-01 03:05:29,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-04-01 03:05:29,982 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2023-04-01 03:05:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:29,982 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-04-01 03:05:29,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-04-01 03:05:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 03:05:29,983 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:29,983 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:29,995 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 03:05:30,183 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 03:05:30,184 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:30,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:30,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1504826342, now seen corresponding path program 7 times [2023-04-01 03:05:30,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:30,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150088415] [2023-04-01 03:05:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:30,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:30,203 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:05:30,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825837043] [2023-04-01 03:05:30,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:05:30,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:30,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:30,207 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 03:05:30,208 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 03:05:30,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:05:30,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 60 conjunts are in the unsatisfiable core [2023-04-01 03:05:30,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:30,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 03:05:30,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:05:30,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 03:05:30,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:05:30,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 03:05:30,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:05:30,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-04-01 03:05:30,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:05:30,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 03:05:30,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:05:30,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 03:05:30,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:05:30,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 03:05:30,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:30,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:30,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-04-01 03:05:30,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-04-01 03:05:30,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:30,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:05:30,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-04-01 03:05:31,333 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 03:05:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:31,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:31,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150088415] [2023-04-01 03:05:31,356 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:05:31,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825837043] [2023-04-01 03:05:31,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825837043] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:31,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [422042437] [2023-04-01 03:05:31,357 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:05:31,357 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:31,358 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:31,358 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:31,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:31,386 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:31,531 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:05:31,541 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:31,544 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:31,548 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:32,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1692#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_7| Int)) (and (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_7|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_7|) (not (= (* 5 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_7|) 0))) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_7|)) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_7|)) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_7| |#StackHeapBarrier|)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:05:32,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:32,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:05:32,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2023-04-01 03:05:32,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464323253] [2023-04-01 03:05:32,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:32,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 03:05:32,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:32,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 03:05:32,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1431, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 03:05:32,266 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 26 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:05:37,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:05:37,261 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2023-04-01 03:05:37,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 03:05:37,262 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2023-04-01 03:05:37,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:05:37,264 INFO L225 Difference]: With dead ends: 35 [2023-04-01 03:05:37,264 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 03:05:37,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=187, Invalid=1975, Unknown=0, NotChecked=0, Total=2162 [2023-04-01 03:05:37,265 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 03:05:37,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 92 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 03:05:37,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 03:05:37,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2023-04-01 03:05:37,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-04-01 03:05:37,274 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2023-04-01 03:05:37,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:37,274 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-04-01 03:05:37,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:05:37,275 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-04-01 03:05:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 03:05:37,275 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:37,275 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:37,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 03:05:37,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:37,476 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:37,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:37,476 INFO L85 PathProgramCache]: Analyzing trace with hash -721161630, now seen corresponding path program 8 times [2023-04-01 03:05:37,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:37,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100270759] [2023-04-01 03:05:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:37,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:37,511 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:05:37,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111381695] [2023-04-01 03:05:37,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:05:37,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:37,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:37,515 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:05:37,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 03:05:37,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 03:05:37,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:05:37,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 03:05:37,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:37,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:37,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:37,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100270759] [2023-04-01 03:05:37,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:05:37,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111381695] [2023-04-01 03:05:37,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111381695] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:37,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1329354880] [2023-04-01 03:05:37,801 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:05:37,801 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:37,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:37,801 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:37,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:37,822 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:37,935 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:05:37,951 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:37,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:37,957 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:38,447 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1972#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_8| Int)) (and (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_8|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_8|) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_8|)) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_8| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_8|) (not (= (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_8|) 0) (* 5 ~N~0))))) (= |#NULL.base| 0))' at error location [2023-04-01 03:05:38,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:38,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:05:38,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2023-04-01 03:05:38,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613499278] [2023-04-01 03:05:38,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:38,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 03:05:38,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:38,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 03:05:38,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2023-04-01 03:05:38,452 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:38,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:05:38,577 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2023-04-01 03:05:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 03:05:38,577 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-04-01 03:05:38,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:05:38,578 INFO L225 Difference]: With dead ends: 36 [2023-04-01 03:05:38,578 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 03:05:38,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 03:05:38,579 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:05:38,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 77 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:05:38,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 03:05:38,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-04-01 03:05:38,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:38,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-04-01 03:05:38,585 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 23 [2023-04-01 03:05:38,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:38,585 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-04-01 03:05:38,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:38,585 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-04-01 03:05:38,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 03:05:38,585 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:38,585 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:38,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 03:05:38,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 03:05:38,792 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:38,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:38,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1192288483, now seen corresponding path program 9 times [2023-04-01 03:05:38,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:38,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100062270] [2023-04-01 03:05:38,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:38,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:38,803 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:05:38,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256603295] [2023-04-01 03:05:38,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:05:38,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:38,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:38,805 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:05:38,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 03:05:38,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:05:38,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:05:38,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 03:05:38,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:38,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:38,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:39,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:39,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100062270] [2023-04-01 03:05:39,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:05:39,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256603295] [2023-04-01 03:05:39,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256603295] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:39,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1364306999] [2023-04-01 03:05:39,012 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:05:39,012 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:39,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:39,013 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:39,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:39,035 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:39,147 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:05:39,156 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:39,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:39,162 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:39,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2249#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_9| Int)) (and (not (= (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_9|) 0) (* 5 ~N~0))) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_9|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_9|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_9|) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_9| |#StackHeapBarrier|)) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_9|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:05:39,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:39,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:05:39,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-04-01 03:05:39,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183645567] [2023-04-01 03:05:39,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:39,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 03:05:39,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:39,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 03:05:39,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2023-04-01 03:05:39,618 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:39,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:05:39,723 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2023-04-01 03:05:39,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 03:05:39,723 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-04-01 03:05:39,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:05:39,723 INFO L225 Difference]: With dead ends: 30 [2023-04-01 03:05:39,724 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 03:05:39,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 03:05:39,724 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:05:39,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 39 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:05:39,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 03:05:39,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 03:05:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:39,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-04-01 03:05:39,733 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2023-04-01 03:05:39,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:39,734 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-04-01 03:05:39,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:39,734 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-04-01 03:05:39,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 03:05:39,735 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:39,736 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:39,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 03:05:39,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 03:05:39,941 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:39,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:39,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1819900667, now seen corresponding path program 10 times [2023-04-01 03:05:39,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:39,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138521909] [2023-04-01 03:05:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:39,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:39,952 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:05:39,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375677362] [2023-04-01 03:05:39,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:05:39,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:39,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:39,953 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:05:39,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 03:05:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:05:40,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 76 conjunts are in the unsatisfiable core [2023-04-01 03:05:40,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:40,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 03:05:40,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 03:05:40,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 03:05:40,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 03:05:40,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-04-01 03:05:40,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2023-04-01 03:05:40,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 03:05:40,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 03:05:40,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 03:05:40,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 03:05:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:40,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:40,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-04-01 03:05:40,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-04-01 03:05:40,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-04-01 03:05:40,662 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:40,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:40,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:05:40,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-04-01 03:05:40,736 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:42,212 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 03:05:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:42,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:42,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138521909] [2023-04-01 03:05:42,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:05:42,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375677362] [2023-04-01 03:05:42,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375677362] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:42,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [574456182] [2023-04-01 03:05:42,232 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:05:42,232 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:42,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:42,232 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:42,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:42,255 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:42,392 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:05:42,405 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:42,407 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:42,412 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:43,319 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2537#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_10| Int)) (and (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_10|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#sum~0.base_BEFORE_CALL_10|)) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_10|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_10|) (not (= (* 5 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_10|) 0))) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_10|)))) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:05:43,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:43,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:05:43,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2023-04-01 03:05:43,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87439678] [2023-04-01 03:05:43,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:43,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-04-01 03:05:43,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:43,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-04-01 03:05:43,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1743, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 03:05:43,323 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:06:00,990 WARN L223 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 183 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 03:06:07,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:06:07,466 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2023-04-01 03:06:07,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 03:06:07,467 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2023-04-01 03:06:07,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:06:07,467 INFO L225 Difference]: With dead ends: 38 [2023-04-01 03:06:07,467 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 03:06:07,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=212, Invalid=2338, Unknown=0, NotChecked=0, Total=2550 [2023-04-01 03:06:07,469 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-01 03:06:07,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 112 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-01 03:06:07,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 03:06:07,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2023-04-01 03:06:07,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:06:07,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-04-01 03:06:07,482 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2023-04-01 03:06:07,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:06:07,482 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-04-01 03:06:07,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:06:07,483 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-04-01 03:06:07,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 03:06:07,483 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:06:07,483 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:06:07,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 03:06:07,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 03:06:07,684 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:06:07,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:06:07,684 INFO L85 PathProgramCache]: Analyzing trace with hash -708483805, now seen corresponding path program 11 times [2023-04-01 03:06:07,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:06:07,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009808500] [2023-04-01 03:06:07,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:06:07,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:06:07,700 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:06:07,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393004404] [2023-04-01 03:06:07,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:06:07,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:06:07,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:06:07,718 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:06:07,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 03:06:07,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 03:06:07,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:06:07,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 03:06:07,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:06:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:06:07,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:06:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:06:08,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:06:08,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009808500] [2023-04-01 03:06:08,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:06:08,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393004404] [2023-04-01 03:06:08,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393004404] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:06:08,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [162120700] [2023-04-01 03:06:08,012 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:06:08,012 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:06:08,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:06:08,012 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:06:08,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:06:08,030 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:06:08,122 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:06:08,134 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:06:08,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:06:08,140 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:06:08,685 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2842#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_11| Int)) (and (not (= (* 5 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_11|) 0))) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_11|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_11|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#sum~0.base_BEFORE_CALL_11|)) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_11|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_11|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:06:08,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:06:08,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:06:08,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2023-04-01 03:06:08,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493680738] [2023-04-01 03:06:08,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:06:08,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 03:06:08,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:06:08,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 03:06:08,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2023-04-01 03:06:08,687 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:06:08,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:06:08,807 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2023-04-01 03:06:08,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 03:06:08,808 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-04-01 03:06:08,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:06:08,808 INFO L225 Difference]: With dead ends: 39 [2023-04-01 03:06:08,808 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 03:06:08,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 03:06:08,809 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:06:08,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 64 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:06:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 03:06:08,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-04-01 03:06:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:06:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-04-01 03:06:08,817 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 25 [2023-04-01 03:06:08,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:06:08,817 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-04-01 03:06:08,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:06:08,817 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-04-01 03:06:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 03:06:08,818 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:06:08,818 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:06:08,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 03:06:09,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 03:06:09,024 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:06:09,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:06:09,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1521072446, now seen corresponding path program 12 times [2023-04-01 03:06:09,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:06:09,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773912186] [2023-04-01 03:06:09,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:06:09,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:06:09,044 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:06:09,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117628489] [2023-04-01 03:06:09,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:06:09,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:06:09,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:06:09,045 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:06:09,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 03:06:09,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:06:09,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:06:09,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 03:06:09,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:06:09,253 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:06:09,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:06:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:06:09,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:06:09,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773912186] [2023-04-01 03:06:09,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:06:09,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117628489] [2023-04-01 03:06:09,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117628489] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:06:09,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1780560231] [2023-04-01 03:06:09,331 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:06:09,331 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:06:09,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:06:09,331 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:06:09,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:06:09,355 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:06:09,438 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:06:09,459 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:06:09,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:06:09,465 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:06:09,941 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3146#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_12| Int)) (and (not (= (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_12|) 0) (* 5 ~N~0))) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_12|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_12|) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_12|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_12|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#sum~0.base_BEFORE_CALL_12|)))) (= |#NULL.base| 0))' at error location [2023-04-01 03:06:09,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:06:09,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:06:09,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-04-01 03:06:09,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931654277] [2023-04-01 03:06:09,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:06:09,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 03:06:09,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:06:09,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 03:06:09,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2023-04-01 03:06:09,943 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:06:10,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:06:10,099 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2023-04-01 03:06:10,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 03:06:10,100 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-04-01 03:06:10,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:06:10,100 INFO L225 Difference]: With dead ends: 32 [2023-04-01 03:06:10,100 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 03:06:10,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 03:06:10,101 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:06:10,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 85 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:06:10,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 03:06:10,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 03:06:10,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:06:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2023-04-01 03:06:10,110 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 25 [2023-04-01 03:06:10,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:06:10,111 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2023-04-01 03:06:10,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:06:10,111 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2023-04-01 03:06:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 03:06:10,111 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:06:10,111 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:06:10,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 03:06:10,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 03:06:10,312 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:06:10,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:06:10,313 INFO L85 PathProgramCache]: Analyzing trace with hash -34743546, now seen corresponding path program 13 times [2023-04-01 03:06:10,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:06:10,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926121887] [2023-04-01 03:06:10,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:06:10,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:06:10,335 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:06:10,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945040889] [2023-04-01 03:06:10,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:06:10,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:06:10,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:06:10,338 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:06:10,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 03:06:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:06:10,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 84 conjunts are in the unsatisfiable core [2023-04-01 03:06:10,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:06:10,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 03:06:10,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:06:10,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 03:06:10,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:06:10,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 03:06:10,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:06:10,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-04-01 03:06:10,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:06:10,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2023-04-01 03:06:10,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:06:10,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 58 [2023-04-01 03:06:10,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:06:10,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:06:10,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:06:10,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:06:10,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:06:10,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:06:10,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:06:10,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:06:10,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:06:10,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:06:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:06:11,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:06:11,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-04-01 03:06:11,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-04-01 03:06:11,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:06:11,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:06:11,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-04-01 03:06:11,358 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:06:11,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:06:11,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-04-01 03:06:11,367 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:06:11,558 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:06:11,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:06:11,568 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:06:11,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:06:11,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-04-01 03:06:11,577 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:06:15,791 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 03:06:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:06:15,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:06:15,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926121887] [2023-04-01 03:06:15,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:06:15,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945040889] [2023-04-01 03:06:15,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945040889] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:06:15,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1383783162] [2023-04-01 03:06:15,819 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:06:15,819 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:06:15,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:06:15,819 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:06:15,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:06:15,843 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:06:15,959 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:06:15,972 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:06:15,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:06:15,979 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:06:17,280 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3460#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_13| Int)) (and (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_13|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#sum~0.base_BEFORE_CALL_13|)) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_13|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_13|) (not (= (* 5 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_13|) 0))) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_13|))) (= |#NULL.base| 0))' at error location [2023-04-01 03:06:17,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:06:17,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:06:17,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2023-04-01 03:06:17,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721984681] [2023-04-01 03:06:17,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:06:17,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-04-01 03:06:17,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:06:17,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-04-01 03:06:17,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2085, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 03:06:17,288 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 34 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)