/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/loops-crafted-1/sum_natnum.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:07:03,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:07:03,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:07:03,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:07:03,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:07:03,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:07:03,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:07:03,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:07:03,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:07:03,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:07:03,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:07:03,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:07:03,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:07:03,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:07:03,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:07:03,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:07:03,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:07:03,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:07:03,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:07:03,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:07:03,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:07:03,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:07:03,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:07:03,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:07:03,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:07:03,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:07:03,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:07:03,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:07:03,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:07:03,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:07:03,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:07:03,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:07:03,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:07:03,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:07:03,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:07:03,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:07:03,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:07:03,507 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:07:03,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:07:03,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:07:03,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:07:03,509 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 05:07:03,533 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:07:03,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:07:03,534 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:07:03,534 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:07:03,535 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:07:03,535 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:07:03,535 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:07:03,535 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:07:03,535 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:07:03,535 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:07:03,536 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:07:03,536 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:07:03,536 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:07:03,536 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:07:03,536 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:07:03,536 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:07:03,537 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:07:03,537 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:07:03,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:07:03,537 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:07:03,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:07:03,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:07:03,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:07:03,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:07:03,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:07:03,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:07:03,538 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:07:03,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:07:03,539 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:07:03,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:07:03,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:07:03,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:07:03,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:07:03,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:07:03,539 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:07:03,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:07:03,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:07:03,540 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:07:03,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:07:03,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:07:03,540 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:07:03,540 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:07:03,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:07:03,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:07:03,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:07:03,777 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:07:03,777 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:07:03,778 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/sum_natnum.c [2023-04-01 05:07:04,797 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:07:04,932 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:07:04,933 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/sum_natnum.c [2023-04-01 05:07:04,939 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6840a7be5/71c94ea0d6174d5189b87c6ab1e69fbe/FLAG200cdb0a7 [2023-04-01 05:07:04,949 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6840a7be5/71c94ea0d6174d5189b87c6ab1e69fbe [2023-04-01 05:07:04,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:07:04,952 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:07:04,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:07:04,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:07:04,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:07:04,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:07:04" (1/1) ... [2023-04-01 05:07:04,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1957637c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:04, skipping insertion in model container [2023-04-01 05:07:04,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:07:04" (1/1) ... [2023-04-01 05:07:04,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:07:04,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:07:05,055 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/loops-crafted-1/sum_natnum.c[458,471] [2023-04-01 05:07:05,060 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:07:05,067 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:07:05,075 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/loops-crafted-1/sum_natnum.c[458,471] [2023-04-01 05:07:05,076 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:07:05,084 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:07:05,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:05 WrapperNode [2023-04-01 05:07:05,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:07:05,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:07:05,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:07:05,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:07:05,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:05" (1/1) ... [2023-04-01 05:07:05,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:05" (1/1) ... [2023-04-01 05:07:05,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:05" (1/1) ... [2023-04-01 05:07:05,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:05" (1/1) ... [2023-04-01 05:07:05,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:05" (1/1) ... [2023-04-01 05:07:05,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:05" (1/1) ... [2023-04-01 05:07:05,100 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:05" (1/1) ... [2023-04-01 05:07:05,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:05" (1/1) ... [2023-04-01 05:07:05,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:07:05,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:07:05,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:07:05,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:07:05,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:05" (1/1) ... [2023-04-01 05:07:05,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:07:05,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:07:05,121 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 05:07:05,168 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 05:07:05,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:07:05,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:07:05,182 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:07:05,182 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 05:07:05,183 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 05:07:05,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:07:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 05:07:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:07:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:07:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:07:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:07:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 05:07:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 05:07:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:07:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:07:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:07:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:07:05,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:07:05,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:07:05,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:07:05,227 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:07:05,228 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:07:05,305 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:07:05,322 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:07:05,322 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 05:07:05,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:07:05 BoogieIcfgContainer [2023-04-01 05:07:05,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:07:05,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:07:05,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:07:05,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:07:05,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:07:04" (1/3) ... [2023-04-01 05:07:05,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e69bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:07:05, skipping insertion in model container [2023-04-01 05:07:05,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:05" (2/3) ... [2023-04-01 05:07:05,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e69bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:07:05, skipping insertion in model container [2023-04-01 05:07:05,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:07:05" (3/3) ... [2023-04-01 05:07:05,329 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_natnum.c [2023-04-01 05:07:05,340 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:07:05,340 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:07:05,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:07:05,375 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;@79c62e9e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:07:05,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:07:05,378 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 05:07:05,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-01 05:07:05,384 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:07:05,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:07:05,386 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:07:05,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:07:05,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1592940235, now seen corresponding path program 1 times [2023-04-01 05:07:05,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:07:05,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119042484] [2023-04-01 05:07:05,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:07:05,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:07:05,460 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:07:05,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687113527] [2023-04-01 05:07:05,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:07:05,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:07:05,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:07:05,474 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 05:07:05,483 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 05:07:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:07:05,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 05:07:05,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:07:05,641 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 05:07:05,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:07:05,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:07:05,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119042484] [2023-04-01 05:07:05,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:07:05,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687113527] [2023-04-01 05:07:05,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687113527] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:07:05,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:07:05,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 05:07:05,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9611727] [2023-04-01 05:07:05,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:07:05,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:07:05,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:07:05,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:07:05,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:07:05,682 INFO L87 Difference]: Start difference. First operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:07:05,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:07:05,719 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-04-01 05:07:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 05:07:05,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-01 05:07:05,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:07:05,725 INFO L225 Difference]: With dead ends: 29 [2023-04-01 05:07:05,725 INFO L226 Difference]: Without dead ends: 12 [2023-04-01 05:07:05,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 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 05:07:05,729 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:07:05,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 21 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:07:05,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-04-01 05:07:05,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-04-01 05:07:05,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:07:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-04-01 05:07:05,751 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2023-04-01 05:07:05,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:07:05,752 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-04-01 05:07:05,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:07:05,752 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-04-01 05:07:05,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 05:07:05,752 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:07:05,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:07:05,760 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 05:07:05,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 05:07:05,958 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:07:05,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:07:05,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1145893788, now seen corresponding path program 1 times [2023-04-01 05:07:05,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:07:05,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422066650] [2023-04-01 05:07:05,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:07:05,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:07:05,969 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:07:05,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847951163] [2023-04-01 05:07:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:07:05,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:07:05,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:07:05,972 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 05:07:05,989 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 05:07:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:07:06,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 05:07:06,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:07:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:07:06,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:07:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:07:06,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:07:06,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422066650] [2023-04-01 05:07:06,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:07:06,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847951163] [2023-04-01 05:07:06,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847951163] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:07:06,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2107126373] [2023-04-01 05:07:06,164 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 05:07:06,164 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:07:06,169 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:07:06,172 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:07:06,173 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:07:06,309 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-04-01 05:07:06,400 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 05:07:06,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:07:06,427 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:07:06,632 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '181#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 40000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:07:06,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:07:06,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:07:06,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 05:07:06,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154349558] [2023-04-01 05:07:06,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:07:06,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 05:07:06,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:07:06,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 05:07:06,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-04-01 05:07:06,637 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 05:07:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:07:06,785 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2023-04-01 05:07:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:07:06,786 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 11 [2023-04-01 05:07:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:07:06,787 INFO L225 Difference]: With dead ends: 20 [2023-04-01 05:07:06,787 INFO L226 Difference]: Without dead ends: 15 [2023-04-01 05:07:06,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-04-01 05:07:06,788 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:07:06,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 21 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:07:06,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-04-01 05:07:06,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-04-01 05:07:06,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:07:06,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-04-01 05:07:06,792 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2023-04-01 05:07:06,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:07:06,792 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-04-01 05:07:06,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 05:07:06,792 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-04-01 05:07:06,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 05:07:06,793 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:07:06,793 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:07:06,804 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 05:07:07,002 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,SelfDestructingSolverStorable1 [2023-04-01 05:07:07,002 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:07:07,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:07:07,003 INFO L85 PathProgramCache]: Analyzing trace with hash 790332171, now seen corresponding path program 2 times [2023-04-01 05:07:07,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:07:07,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127242283] [2023-04-01 05:07:07,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:07:07,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:07:07,035 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:07:07,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703099179] [2023-04-01 05:07:07,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:07:07,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:07:07,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:07:07,037 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 05:07:07,050 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 05:07:07,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 05:07:07,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:07:07,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 05:07:07,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:07:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:07:07,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:07:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:07:07,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:07:07,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127242283] [2023-04-01 05:07:07,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:07:07,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703099179] [2023-04-01 05:07:07,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703099179] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:07:07,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2058420115] [2023-04-01 05:07:07,224 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 05:07:07,224 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:07:07,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:07:07,225 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:07:07,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:07:07,256 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-04-01 05:07:07,309 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 05:07:07,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:07:07,336 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:07:07,508 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '346#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 40000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:07:07,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:07:07,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:07:07,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-01 05:07:07,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401355328] [2023-04-01 05:07:07,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:07:07,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 05:07:07,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:07:07,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 05:07:07,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2023-04-01 05:07:07,513 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 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), 1 states have call successors, (2) [2023-04-01 05:07:07,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:07:07,656 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-04-01 05:07:07,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 05:07:07,657 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 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), 1 states have call successors, (2) Word has length 14 [2023-04-01 05:07:07,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:07:07,658 INFO L225 Difference]: With dead ends: 26 [2023-04-01 05:07:07,658 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 05:07:07,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2023-04-01 05:07:07,659 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:07:07,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:07:07,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 05:07:07,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 05:07:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:07:07,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2023-04-01 05:07:07,663 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2023-04-01 05:07:07,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:07:07,663 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2023-04-01 05:07:07,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 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), 1 states have call successors, (2) [2023-04-01 05:07:07,664 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2023-04-01 05:07:07,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 05:07:07,664 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:07:07,664 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:07:07,671 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 05:07:07,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:07:07,871 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:07:07,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:07:07,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1912862357, now seen corresponding path program 3 times [2023-04-01 05:07:07,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:07:07,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373809596] [2023-04-01 05:07:07,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:07:07,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:07:07,884 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:07:07,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [213483122] [2023-04-01 05:07:07,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:07:07,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:07:07,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:07:07,895 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 05:07:07,898 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 05:07:07,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:07:07,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:07:07,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 05:07:07,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:07:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:07:08,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:07:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:07:08,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:07:08,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373809596] [2023-04-01 05:07:08,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:07:08,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213483122] [2023-04-01 05:07:08,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213483122] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:07:08,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1199266052] [2023-04-01 05:07:08,268 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 05:07:08,268 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:07:08,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:07:08,269 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:07:08,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:07:08,290 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-04-01 05:07:08,317 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 05:07:08,324 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:07:08,328 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:07:08,504 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '589#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 40000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:07:08,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:07:08,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:07:08,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-04-01 05:07:08,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265749682] [2023-04-01 05:07:08,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:07:08,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 05:07:08,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:07:08,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 05:07:08,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 05:07:08,507 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 05:07:10,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:07:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:07:11,649 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2023-04-01 05:07:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 05:07:11,649 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-04-01 05:07:11,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:07:11,650 INFO L225 Difference]: With dead ends: 38 [2023-04-01 05:07:11,650 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 05:07:11,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=623, Invalid=1269, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 05:07:11,652 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:07:11,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 30 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2023-04-01 05:07:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 05:07:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-01 05:07:11,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:07:11,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2023-04-01 05:07:11,656 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2023-04-01 05:07:11,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:07:11,657 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2023-04-01 05:07:11,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 05:07:11,657 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2023-04-01 05:07:11,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 05:07:11,657 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:07:11,657 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:07:11,676 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 05:07:11,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:07:11,877 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:07:11,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:07:11,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1281343957, now seen corresponding path program 4 times [2023-04-01 05:07:11,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:07:11,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955272606] [2023-04-01 05:07:11,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:07:11,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:07:11,895 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:07:11,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144620738] [2023-04-01 05:07:11,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 05:07:11,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:07:11,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:07:11,896 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 05:07:11,898 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 05:07:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:07:11,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 05:07:11,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:07:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:07:12,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:07:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:07:12,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:07:12,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955272606] [2023-04-01 05:07:12,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:07:12,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144620738] [2023-04-01 05:07:12,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144620738] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:07:12,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [146658294] [2023-04-01 05:07:12,750 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 05:07:12,750 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:07:12,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:07:12,750 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:07:12,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:07:12,773 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-04-01 05:07:12,798 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 05:07:12,805 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:07:12,808 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:07:13,040 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '988#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 40000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:07:13,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:07:13,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:07:13,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-04-01 05:07:13,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860573250] [2023-04-01 05:07:13,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:07:13,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-01 05:07:13,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:07:13,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-01 05:07:13,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1219, Invalid=2087, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 05:07:13,043 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 05:07:13,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:07:13,811 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2023-04-01 05:07:13,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 05:07:13,813 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-04-01 05:07:13,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:07:13,814 INFO L225 Difference]: With dead ends: 62 [2023-04-01 05:07:13,814 INFO L226 Difference]: Without dead ends: 57 [2023-04-01 05:07:13,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2369, Invalid=4111, Unknown=0, NotChecked=0, Total=6480 [2023-04-01 05:07:13,817 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 59 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:07:13,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 33 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:07:13,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-01 05:07:13,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-04-01 05:07:13,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:07:13,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2023-04-01 05:07:13,824 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2023-04-01 05:07:13,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:07:13,824 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2023-04-01 05:07:13,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 05:07:13,824 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2023-04-01 05:07:13,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 05:07:13,825 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:07:13,825 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:07:13,841 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 05:07:14,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:07:14,031 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:07:14,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:07:14,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1885161387, now seen corresponding path program 5 times [2023-04-01 05:07:14,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:07:14,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893440327] [2023-04-01 05:07:14,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:07:14,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:07:14,085 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:07:14,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140220516] [2023-04-01 05:07:14,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:07:14,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:07:14,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:07:14,087 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 05:07:14,089 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 05:07:14,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-04-01 05:07:14,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:07:14,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-01 05:07:14,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:07:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:07:15,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:07:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:07:16,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:07:16,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893440327] [2023-04-01 05:07:16,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:07:16,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140220516] [2023-04-01 05:07:16,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140220516] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:07:16,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1674638471] [2023-04-01 05:07:16,819 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 05:07:16,819 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:07:16,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:07:16,820 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:07:16,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:07:16,834 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-04-01 05:07:16,868 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-01 05:07:16,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:07:16,880 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:07:17,192 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1700#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 40000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:07:17,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:07:17,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:07:17,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2023-04-01 05:07:17,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398905010] [2023-04-01 05:07:17,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:07:17,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-04-01 05:07:17,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:07:17,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-04-01 05:07:17,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4699, Invalid=6431, Unknown=0, NotChecked=0, Total=11130 [2023-04-01 05:07:17,199 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 98 states, 98 states have (on average 1.030612244897959) internal successors, (101), 97 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 05:07:19,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:07:19,073 INFO L93 Difference]: Finished difference Result 110 states and 157 transitions. [2023-04-01 05:07:19,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-04-01 05:07:19,074 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.030612244897959) internal successors, (101), 97 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 56 [2023-04-01 05:07:19,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:07:19,076 INFO L225 Difference]: With dead ends: 110 [2023-04-01 05:07:19,076 INFO L226 Difference]: Without dead ends: 105 [2023-04-01 05:07:19,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5834 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=9305, Invalid=13951, Unknown=0, NotChecked=0, Total=23256 [2023-04-01 05:07:19,084 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 107 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:07:19,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 25 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:07:19,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-04-01 05:07:19,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-04-01 05:07:19,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:07:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2023-04-01 05:07:19,120 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 56 [2023-04-01 05:07:19,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:07:19,121 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2023-04-01 05:07:19,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.030612244897959) internal successors, (101), 97 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 05:07:19,121 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2023-04-01 05:07:19,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-01 05:07:19,126 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:07:19,126 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:07:19,132 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 05:07:19,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:07:19,332 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:07:19,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:07:19,335 INFO L85 PathProgramCache]: Analyzing trace with hash -622208341, now seen corresponding path program 6 times [2023-04-01 05:07:19,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:07:19,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464025973] [2023-04-01 05:07:19,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:07:19,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:07:19,363 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:07:19,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739057139] [2023-04-01 05:07:19,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:07:19,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:07:19,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:07:19,364 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 05:07:19,366 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 05:07:19,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:07:19,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:07:19,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 97 conjunts are in the unsatisfiable core [2023-04-01 05:07:19,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:07:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:07:22,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:07:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:07:27,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:07:27,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464025973] [2023-04-01 05:07:27,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:07:27,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739057139] [2023-04-01 05:07:27,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739057139] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:07:27,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [427085478] [2023-04-01 05:07:27,809 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 05:07:27,809 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:07:27,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:07:27,810 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:07:27,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:07:27,836 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-04-01 05:07:27,861 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-01 05:07:27,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:07:27,890 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:07:28,348 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3036#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 40000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:07:28,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:07:28,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:07:28,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2023-04-01 05:07:28,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586479636] [2023-04-01 05:07:28,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:07:28,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2023-04-01 05:07:28,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:07:28,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2023-04-01 05:07:28,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18571, Invalid=22031, Unknown=0, NotChecked=0, Total=40602 [2023-04-01 05:07:28,362 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 194 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 193 states have internal predecessors, (197), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 05:07:34,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:07:34,951 INFO L93 Difference]: Finished difference Result 206 states and 301 transitions. [2023-04-01 05:07:34,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-04-01 05:07:34,952 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 193 states have internal predecessors, (197), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 104 [2023-04-01 05:07:34,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:07:34,958 INFO L225 Difference]: With dead ends: 206 [2023-04-01 05:07:34,958 INFO L226 Difference]: Without dead ends: 201 [2023-04-01 05:07:34,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20906 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=37001, Invalid=50911, Unknown=0, NotChecked=0, Total=87912 [2023-04-01 05:07:34,963 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 203 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:07:34,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 33 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:07:34,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-04-01 05:07:34,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2023-04-01 05:07:34,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0051020408163265) internal successors, (197), 196 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:07:34,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2023-04-01 05:07:34,976 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 104 [2023-04-01 05:07:34,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:07:34,976 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2023-04-01 05:07:34,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 193 states have internal predecessors, (197), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 05:07:34,977 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2023-04-01 05:07:34,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-04-01 05:07:34,978 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:07:34,978 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:07:34,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 05:07:35,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:07:35,184 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:07:35,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:07:35,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1907556181, now seen corresponding path program 7 times [2023-04-01 05:07:35,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:07:35,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455442053] [2023-04-01 05:07:35,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:07:35,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:07:35,223 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:07:35,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605254104] [2023-04-01 05:07:35,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 05:07:35,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:07:35,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:07:35,224 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 05:07:35,226 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 05:07:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:07:35,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 1008 conjuncts, 193 conjunts are in the unsatisfiable core [2023-04-01 05:07:35,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:07:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:07:47,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:08:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:08:09,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:08:09,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455442053] [2023-04-01 05:08:09,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:08:09,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605254104] [2023-04-01 05:08:09,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605254104] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:08:09,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1488781334] [2023-04-01 05:08:09,060 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 05:08:09,061 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:08:09,066 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:08:09,066 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:08:09,066 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:08:09,081 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-04-01 05:08:09,118 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2023-04-01 05:08:09,125 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:08:09,129 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:08:09,958 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5620#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 40000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:08:09,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:08:09,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:08:09,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194] total 386 [2023-04-01 05:08:09,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771969028] [2023-04-01 05:08:09,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:08:09,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2023-04-01 05:08:09,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:08:09,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2023-04-01 05:08:09,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73963, Invalid=80879, Unknown=0, NotChecked=0, Total=154842 [2023-04-01 05:08:09,983 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand has 386 states, 386 states have (on average 1.0077720207253886) internal successors, (389), 385 states have internal predecessors, (389), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)