/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-fpi/condn.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:00:40,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:00:40,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:00:40,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:00:40,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:00:40,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:00:40,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:00:40,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:00:40,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:00:40,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:00:40,945 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:00:40,946 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:00:40,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:00:40,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:00:40,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:00:40,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:00:40,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:00:40,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:00:40,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:00:40,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:00:40,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:00:40,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:00:40,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:00:40,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:00:40,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:00:40,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:00:40,957 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:00:40,958 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:00:40,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:00:40,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:00:40,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:00:40,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:00:40,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:00:40,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:00:40,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:00:40,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:00:40,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:00:40,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:00:40,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:00:40,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:00:40,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:00:40,964 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 03:00:40,991 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:00:40,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:00:40,992 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:00:40,992 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:00:40,993 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:00:40,993 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:00:40,993 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:00:40,993 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:00:40,993 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:00:40,993 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:00:40,994 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:00:40,994 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:00:40,994 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:00:40,994 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:00:40,994 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:00:40,994 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:00:40,994 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:00:40,995 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:00:40,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:00:40,995 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:00:40,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:00:40,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:00:40,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:00:40,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:00:40,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:00:40,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:00:40,996 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:00:40,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:00:40,996 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:00:40,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:00:40,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:00:40,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:00:40,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:00:40,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:00:40,997 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:00:40,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:00:40,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:00:40,998 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:00:40,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:00:40,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:00:40,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:00:40,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:00:41,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:00:41,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:00:41,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:00:41,219 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:00:41,220 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:00:41,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/condn.c [2023-04-01 03:00:42,277 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:00:42,469 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:00:42,469 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condn.c [2023-04-01 03:00:42,474 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b0044341/e9b095d4873d463b87bd722e3525c27b/FLAG1a07609c3 [2023-04-01 03:00:42,486 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b0044341/e9b095d4873d463b87bd722e3525c27b [2023-04-01 03:00:42,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:00:42,490 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:00:42,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:00:42,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:00:42,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:00:42,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:00:42" (1/1) ... [2023-04-01 03:00:42,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b6adfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:42, skipping insertion in model container [2023-04-01 03:00:42,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:00:42" (1/1) ... [2023-04-01 03:00:42,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:00:42,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:00:42,601 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condn.c[588,601] [2023-04-01 03:00:42,612 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:00:42,620 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:00:42,629 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condn.c[588,601] [2023-04-01 03:00:42,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:00:42,647 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:00:42,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:42 WrapperNode [2023-04-01 03:00:42,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:00:42,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:00:42,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:00:42,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:00:42,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:42" (1/1) ... [2023-04-01 03:00:42,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:42" (1/1) ... [2023-04-01 03:00:42,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:42" (1/1) ... [2023-04-01 03:00:42,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:42" (1/1) ... [2023-04-01 03:00:42,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:42" (1/1) ... [2023-04-01 03:00:42,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:42" (1/1) ... [2023-04-01 03:00:42,679 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:42" (1/1) ... [2023-04-01 03:00:42,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:42" (1/1) ... [2023-04-01 03:00:42,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:00:42,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:00:42,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:00:42,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:00:42,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:42" (1/1) ... [2023-04-01 03:00:42,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:00:42,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:42,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 03:00:42,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 03:00:42,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:00:42,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:00:42,735 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:00:42,735 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 03:00:42,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 03:00:42,735 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:00:42,735 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:00:42,736 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:00:42,736 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:00:42,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:00:42,736 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 03:00:42,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 03:00:42,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:00:42,736 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 03:00:42,736 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:00:42,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 03:00:42,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:00:42,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:00:42,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:00:42,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:00:42,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:00:42,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:00:42,784 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:00:42,786 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:00:43,022 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:00:43,107 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:00:43,108 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 03:00:43,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:00:43 BoogieIcfgContainer [2023-04-01 03:00:43,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:00:43,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:00:43,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:00:43,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:00:43,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:00:42" (1/3) ... [2023-04-01 03:00:43,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e86cacc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:00:43, skipping insertion in model container [2023-04-01 03:00:43,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:42" (2/3) ... [2023-04-01 03:00:43,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e86cacc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:00:43, skipping insertion in model container [2023-04-01 03:00:43,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:00:43" (3/3) ... [2023-04-01 03:00:43,123 INFO L112 eAbstractionObserver]: Analyzing ICFG condn.c [2023-04-01 03:00:43,136 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:00:43,137 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:00:43,184 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:00:43,189 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;@763f01b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:00:43,190 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:00:43,193 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 03:00:43,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 03:00:43,198 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:43,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:00:43,199 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:43,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:43,204 INFO L85 PathProgramCache]: Analyzing trace with hash -618764107, now seen corresponding path program 1 times [2023-04-01 03:00:43,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:43,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089796496] [2023-04-01 03:00:43,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:43,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:00:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:00:43,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:43,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089796496] [2023-04-01 03:00:43,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089796496] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:00:43,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:00:43,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 03:00:43,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928063630] [2023-04-01 03:00:43,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:00:43,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 03:00:43,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:00:43,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 03:00:43,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 03:00:43,519 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:00:43,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:00:43,573 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2023-04-01 03:00:43,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 03:00:43,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-04-01 03:00:43,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:00:43,597 INFO L225 Difference]: With dead ends: 48 [2023-04-01 03:00:43,597 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 03:00:43,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 03:00:43,601 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:00:43,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 33 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:00:43,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 03:00:43,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-04-01 03:00:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:00:43,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-04-01 03:00:43,637 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2023-04-01 03:00:43,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:00:43,638 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-04-01 03:00:43,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:00:43,638 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-04-01 03:00:43,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 03:00:43,638 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:43,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:00:43,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:00:43,639 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:43,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:43,640 INFO L85 PathProgramCache]: Analyzing trace with hash -2129516490, now seen corresponding path program 1 times [2023-04-01 03:00:43,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:43,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958577809] [2023-04-01 03:00:43,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:43,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:00:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:00:44,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:44,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958577809] [2023-04-01 03:00:44,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958577809] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:00:44,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777078491] [2023-04-01 03:00:44,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:44,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:44,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:44,033 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:00:44,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 03:00:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:00:44,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 03:00:44,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:00:44,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 44 [2023-04-01 03:00:44,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 03:00:44,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-04-01 03:00:44,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 03:00:44,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:00:44,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:00:44,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:00:44,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 73 treesize of output 58 [2023-04-01 03:00:44,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 47 [2023-04-01 03:00:44,497 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 03:00:44,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 20 [2023-04-01 03:00:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:00:44,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777078491] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:00:44,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1867194096] [2023-04-01 03:00:44,546 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:00:44,547 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:00:44,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:00:44,554 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:00:44,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:00:44,663 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:00:44,880 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:00:44,900 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:00:44,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:00:44,917 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:00:45,514 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '260#(and (<= 1 |#StackHeapBarrier|) (exists ((v_main_~a~0.base_BEFORE_CALL_1 Int)) (and (< ~N~0 (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_1) 0)) (<= (+ v_main_~a~0.base_BEFORE_CALL_1 1) |#StackHeapBarrier|))) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:00:45,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:00:45,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 03:00:45,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2023-04-01 03:00:45,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582173598] [2023-04-01 03:00:45,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 03:00:45,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 03:00:45,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:00:45,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 03:00:45,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2023-04-01 03:00:45,518 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:00:45,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:00:45,671 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2023-04-01 03:00:45,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 03:00:45,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-04-01 03:00:45,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:00:45,673 INFO L225 Difference]: With dead ends: 32 [2023-04-01 03:00:45,673 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 03:00:45,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2023-04-01 03:00:45,677 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:00:45,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 99 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:00:45,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 03:00:45,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2023-04-01 03:00:45,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 03:00:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-04-01 03:00:45,687 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 19 [2023-04-01 03:00:45,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:00:45,687 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-04-01 03:00:45,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:00:45,687 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-04-01 03:00:45,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 03:00:45,688 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:45,688 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:00:45,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 03:00:45,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:45,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:45,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:45,897 INFO L85 PathProgramCache]: Analyzing trace with hash -213783823, now seen corresponding path program 1 times [2023-04-01 03:00:45,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:45,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396264706] [2023-04-01 03:00:45,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:45,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:00:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:00:45,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:45,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396264706] [2023-04-01 03:00:45,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396264706] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:00:45,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97375311] [2023-04-01 03:00:45,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:45,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:45,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:45,967 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:00:45,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 03:00:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:00:46,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:00:46,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:00:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:00:46,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:00:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:00:46,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97375311] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:00:46,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1631018458] [2023-04-01 03:00:46,083 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 03:00:46,083 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:00:46,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:00:46,083 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:00:46,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:00:46,121 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:00:46,308 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:00:46,330 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:00:46,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:00:46,351 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:00:46,851 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '536#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~i~0_BEFORE_CALL_8 Int) (v_main_~a~0.base_BEFORE_CALL_6 Int)) (and (< v_main_~i~0_BEFORE_CALL_8 ~N~0) (< ~N~0 (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_6) (* v_main_~i~0_BEFORE_CALL_8 4))) (<= (+ v_main_~a~0.base_BEFORE_CALL_6 1) |#StackHeapBarrier|) (<= ~N~0 (+ 2147483647 v_main_~i~0_BEFORE_CALL_8)) (<= 0 v_main_~i~0_BEFORE_CALL_8) (<= 1 (+ v_main_~i~0_BEFORE_CALL_8 ~N~0)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_8 |#StackHeapBarrier|)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:00:46,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:00:46,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 03:00:46,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-04-01 03:00:46,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724089657] [2023-04-01 03:00:46,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 03:00:46,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 03:00:46,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:00:46,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 03:00:46,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2023-04-01 03:00:46,854 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 03:00:46,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:00:46,912 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2023-04-01 03:00:46,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:00:46,912 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 26 [2023-04-01 03:00:46,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:00:46,913 INFO L225 Difference]: With dead ends: 61 [2023-04-01 03:00:46,913 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 03:00:46,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2023-04-01 03:00:46,914 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:00:46,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 80 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:00:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 03:00:46,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-04-01 03:00:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 03:00:46,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2023-04-01 03:00:46,918 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2023-04-01 03:00:46,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:00:46,919 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2023-04-01 03:00:46,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 03:00:46,919 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2023-04-01 03:00:46,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 03:00:46,919 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:46,919 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:00:46,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 03:00:47,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 03:00:47,125 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:47,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:47,126 INFO L85 PathProgramCache]: Analyzing trace with hash -340037966, now seen corresponding path program 2 times [2023-04-01 03:00:47,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:47,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447197117] [2023-04-01 03:00:47,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:47,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:00:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:00:47,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:47,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447197117] [2023-04-01 03:00:47,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447197117] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:00:47,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952034023] [2023-04-01 03:00:47,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:00:47,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:47,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:47,457 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:00:47,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 03:00:47,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 03:00:47,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:00:47,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 03:00:47,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:00:47,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 44 [2023-04-01 03:00:47,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 03:00:47,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-04-01 03:00:47,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 03:00:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:00:47,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:00:47,875 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:00:47,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 73 treesize of output 58 [2023-04-01 03:00:47,905 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 03:00:47,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2023-04-01 03:00:47,917 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 03:00:47,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2023-04-01 03:00:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:00:47,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952034023] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:00:47,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [434067814] [2023-04-01 03:00:47,958 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 03:00:47,958 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:00:47,958 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:00:47,958 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:00:47,958 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:00:47,994 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:00:48,160 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:00:48,183 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:00:48,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:00:48,191 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:00:48,902 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '890#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((v_main_~a~0.base_BEFORE_CALL_15 Int) (v_main_~i~0_BEFORE_CALL_17 Int)) (and (<= ~N~0 (+ 2147483647 v_main_~i~0_BEFORE_CALL_17)) (<= 0 v_main_~i~0_BEFORE_CALL_17) (<= 1 (+ v_main_~i~0_BEFORE_CALL_17 ~N~0)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_17 |#StackHeapBarrier|)) (< v_main_~i~0_BEFORE_CALL_17 ~N~0) (< ~N~0 (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_15) (* v_main_~i~0_BEFORE_CALL_17 4))) (<= (+ v_main_~a~0.base_BEFORE_CALL_15 1) |#StackHeapBarrier|))) (= |#NULL.base| 0))' at error location [2023-04-01 03:00:48,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:00:48,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 03:00:48,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 10] total 28 [2023-04-01 03:00:48,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500548778] [2023-04-01 03:00:48,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 03:00:48,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 03:00:48,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:00:48,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 03:00:48,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1713, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 03:00:48,904 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 28 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 03:00:49,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:00:49,128 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2023-04-01 03:00:49,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 03:00:49,129 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 28 [2023-04-01 03:00:49,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:00:49,129 INFO L225 Difference]: With dead ends: 41 [2023-04-01 03:00:49,129 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 03:00:49,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 03:00:49,131 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:00:49,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 170 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:00:49,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 03:00:49,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2023-04-01 03:00:49,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 03:00:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-04-01 03:00:49,137 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 28 [2023-04-01 03:00:49,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:00:49,137 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-04-01 03:00:49,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 03:00:49,138 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-04-01 03:00:49,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 03:00:49,138 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:49,138 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:00:49,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 03:00:49,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:49,340 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:49,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:49,340 INFO L85 PathProgramCache]: Analyzing trace with hash -875585291, now seen corresponding path program 3 times [2023-04-01 03:00:49,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:49,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165101592] [2023-04-01 03:00:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:49,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:00:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 03:00:49,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:49,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165101592] [2023-04-01 03:00:49,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165101592] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:00:49,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213049404] [2023-04-01 03:00:49,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:00:49,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:49,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:49,415 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:00:49,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 03:00:49,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:00:49,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:00:49,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 03:00:49,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:00:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 03:00:49,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:00:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 03:00:49,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213049404] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:00:49,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [141471427] [2023-04-01 03:00:49,552 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 03:00:49,552 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:00:49,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:00:49,553 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:00:49,553 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:00:49,574 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:00:49,702 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:00:49,751 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:00:49,756 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:00:49,763 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:00:50,318 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1256#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~a~0.base_BEFORE_CALL_22 Int) (v_main_~i~0_BEFORE_CALL_28 Int)) (and (<= 0 v_main_~i~0_BEFORE_CALL_28) (<= 1 (+ v_main_~i~0_BEFORE_CALL_28 |#StackHeapBarrier|)) (<= (+ v_main_~a~0.base_BEFORE_CALL_22 1) |#StackHeapBarrier|) (< v_main_~i~0_BEFORE_CALL_28 ~N~0) (<= 1 (+ v_main_~i~0_BEFORE_CALL_28 ~N~0)) (<= ~N~0 (+ 2147483647 v_main_~i~0_BEFORE_CALL_28)) (< ~N~0 (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_22) (* v_main_~i~0_BEFORE_CALL_28 4))))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:00:50,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:00:50,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 03:00:50,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2023-04-01 03:00:50,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740540110] [2023-04-01 03:00:50,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 03:00:50,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 03:00:50,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:00:50,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 03:00:50,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2023-04-01 03:00:50,320 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 03:00:50,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:00:50,422 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2023-04-01 03:00:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 03:00:50,422 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 35 [2023-04-01 03:00:50,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:00:50,425 INFO L225 Difference]: With dead ends: 85 [2023-04-01 03:00:50,425 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 03:00:50,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2023-04-01 03:00:50,428 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:00:50,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 48 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:00:50,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 03:00:50,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2023-04-01 03:00:50,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 03:00:50,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-04-01 03:00:50,441 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2023-04-01 03:00:50,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:00:50,442 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-04-01 03:00:50,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 03:00:50,442 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-04-01 03:00:50,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 03:00:50,442 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:50,442 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:00:50,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 03:00:50,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:50,650 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:50,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:50,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1007622538, now seen corresponding path program 4 times [2023-04-01 03:00:50,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:50,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301582024] [2023-04-01 03:00:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:50,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:00:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 03:00:51,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:51,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301582024] [2023-04-01 03:00:51,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301582024] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:00:51,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033093165] [2023-04-01 03:00:51,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:00:51,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:51,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:51,077 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:00:51,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 03:00:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:00:51,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 37 conjunts are in the unsatisfiable core [2023-04-01 03:00:51,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:00:51,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2023-04-01 03:00:51,458 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 03:00:51,460 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:00:51,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 16 [2023-04-01 03:00:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 03:00:51,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:00:51,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:00:51,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 73 treesize of output 58 [2023-04-01 03:00:51,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 53 [2023-04-01 03:00:51,675 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 03:00:51,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2023-04-01 03:00:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 03:00:51,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033093165] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:00:51,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [755543810] [2023-04-01 03:00:51,729 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 03:00:51,729 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:00:51,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:00:51,730 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:00:51,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:00:51,758 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:00:51,891 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:00:51,911 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:00:51,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:00:51,919 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:00:52,551 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1713#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (exists ((v_main_~a~0.base_BEFORE_CALL_33 Int) (v_main_~i~0_BEFORE_CALL_39 Int)) (and (<= (+ v_main_~a~0.base_BEFORE_CALL_33 1) |#StackHeapBarrier|) (< v_main_~i~0_BEFORE_CALL_39 ~N~0) (<= 1 (+ v_main_~i~0_BEFORE_CALL_39 ~N~0)) (<= 0 v_main_~i~0_BEFORE_CALL_39) (<= 1 (+ v_main_~i~0_BEFORE_CALL_39 |#StackHeapBarrier|)) (< ~N~0 (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_33) (* v_main_~i~0_BEFORE_CALL_39 4))) (<= ~N~0 (+ 2147483647 v_main_~i~0_BEFORE_CALL_39)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:00:52,552 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:00:52,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 03:00:52,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 12] total 25 [2023-04-01 03:00:52,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429086882] [2023-04-01 03:00:52,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 03:00:52,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 03:00:52,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:00:52,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 03:00:52,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1502, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 03:00:52,554 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 25 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 6 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 03:00:54,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 03:00:55,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:00:55,003 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2023-04-01 03:00:55,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 03:00:55,004 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 6 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 37 [2023-04-01 03:00:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:00:55,004 INFO L225 Difference]: With dead ends: 50 [2023-04-01 03:00:55,004 INFO L226 Difference]: Without dead ends: 48 [2023-04-01 03:00:55,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 73 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=205, Invalid=2051, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 03:00:55,006 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:00:55,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 191 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 426 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 03:00:55,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-01 03:00:55,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-04-01 03:00:55,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 03:00:55,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-04-01 03:00:55,011 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 37 [2023-04-01 03:00:55,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:00:55,012 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-04-01 03:00:55,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 6 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 03:00:55,012 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-04-01 03:00:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 03:00:55,025 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:55,025 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:00:55,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 03:00:55,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:55,247 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:55,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:55,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1916576945, now seen corresponding path program 5 times [2023-04-01 03:00:55,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:55,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849375952] [2023-04-01 03:00:55,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:55,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:00:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 03:00:55,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:55,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849375952] [2023-04-01 03:00:55,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849375952] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:00:55,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429040662] [2023-04-01 03:00:55,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:00:55,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:55,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:55,353 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:00:55,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 03:00:55,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 03:00:55,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:00:55,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 03:00:55,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:00:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 03:00:55,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:00:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 03:00:55,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429040662] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:00:55,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [836070183] [2023-04-01 03:00:55,717 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 03:00:55,717 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:00:55,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:00:55,717 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:00:55,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:00:55,739 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:00:55,878 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:00:55,896 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:00:55,899 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:00:55,904 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:00:56,478 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2170#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~i~0_BEFORE_CALL_52 Int) (v_main_~a~0.base_BEFORE_CALL_40 Int)) (and (< v_main_~i~0_BEFORE_CALL_52 ~N~0) (<= (+ v_main_~a~0.base_BEFORE_CALL_40 1) |#StackHeapBarrier|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_52 |#StackHeapBarrier|)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_52 ~N~0)) (< ~N~0 (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_40) (* v_main_~i~0_BEFORE_CALL_52 4))) (<= 0 v_main_~i~0_BEFORE_CALL_52) (<= ~N~0 (+ 2147483647 v_main_~i~0_BEFORE_CALL_52)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:00:56,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:00:56,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 03:00:56,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-04-01 03:00:56,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362789428] [2023-04-01 03:00:56,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 03:00:56,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 03:00:56,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:00:56,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 03:00:56,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 03:00:56,480 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 9 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 03:00:56,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:00:56,602 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2023-04-01 03:00:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 03:00:56,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 9 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 44 [2023-04-01 03:00:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:00:56,603 INFO L225 Difference]: With dead ends: 109 [2023-04-01 03:00:56,603 INFO L226 Difference]: Without dead ends: 53 [2023-04-01 03:00:56,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 104 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 03:00:56,604 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:00:56,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 61 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:00:56,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-01 03:00:56,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2023-04-01 03:00:56,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 03:00:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2023-04-01 03:00:56,610 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2023-04-01 03:00:56,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:00:56,610 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2023-04-01 03:00:56,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 9 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 03:00:56,611 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2023-04-01 03:00:56,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 03:00:56,611 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:56,611 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:00:56,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 03:00:56,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:56,817 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:56,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:56,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1578443150, now seen corresponding path program 6 times [2023-04-01 03:00:56,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:56,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870028796] [2023-04-01 03:00:56,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:56,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:00:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 03:00:57,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:57,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870028796] [2023-04-01 03:00:57,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870028796] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:00:57,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340867225] [2023-04-01 03:00:57,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:00:57,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:57,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:57,377 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:00:57,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 03:00:57,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:00:57,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:00:57,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 03:00:57,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:00:57,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2023-04-01 03:00:57,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 03:00:57,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-04-01 03:00:58,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-04-01 03:00:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 03:00:58,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:01:06,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:01:06,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 73 treesize of output 58 [2023-04-01 03:01:06,518 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 03:01:06,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-04-01 03:01:06,523 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:01:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 03:01:06,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340867225] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:01:06,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1815874213] [2023-04-01 03:01:06,535 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 03:01:06,535 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:01:06,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:01:06,535 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:01:06,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:01:06,569 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:01:06,728 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:01:06,752 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:01:06,755 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:01:06,761 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:01:13,637 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2745#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~a~0.base_BEFORE_CALL_53 Int) (v_main_~i~0_BEFORE_CALL_65 Int)) (and (<= 1 (+ v_main_~i~0_BEFORE_CALL_65 ~N~0)) (< ~N~0 (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_53) (* v_main_~i~0_BEFORE_CALL_65 4))) (<= (+ v_main_~a~0.base_BEFORE_CALL_53 1) |#StackHeapBarrier|) (<= ~N~0 (+ 2147483647 v_main_~i~0_BEFORE_CALL_65)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_65 |#StackHeapBarrier|)) (< v_main_~i~0_BEFORE_CALL_65 ~N~0) (<= 0 v_main_~i~0_BEFORE_CALL_65))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:01:13,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:01:13,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 03:01:13,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 14] total 37 [2023-04-01 03:01:13,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552763547] [2023-04-01 03:01:13,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 03:01:13,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-01 03:01:13,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:01:13,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-01 03:01:13,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2550, Unknown=7, NotChecked=0, Total=2756 [2023-04-01 03:01:13,640 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 11 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-04-01 03:01:23,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:01:23,285 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2023-04-01 03:01:23,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-01 03:01:23,286 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 11 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 46 [2023-04-01 03:01:23,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:01:23,287 INFO L225 Difference]: With dead ends: 59 [2023-04-01 03:01:23,287 INFO L226 Difference]: Without dead ends: 57 [2023-04-01 03:01:23,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 97 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=442, Invalid=4803, Unknown=11, NotChecked=0, Total=5256 [2023-04-01 03:01:23,289 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:01:23,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 232 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 03:01:23,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-01 03:01:23,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-04-01 03:01:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 03:01:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2023-04-01 03:01:23,300 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 46 [2023-04-01 03:01:23,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:01:23,300 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2023-04-01 03:01:23,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 11 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-04-01 03:01:23,300 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2023-04-01 03:01:23,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 03:01:23,301 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:23,301 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:01:23,307 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 03:01:23,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:23,502 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:23,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:23,502 INFO L85 PathProgramCache]: Analyzing trace with hash 504822069, now seen corresponding path program 7 times [2023-04-01 03:01:23,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:23,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103157268] [2023-04-01 03:01:23,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:23,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:01:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-04-01 03:01:23,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:01:23,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103157268] [2023-04-01 03:01:23,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103157268] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:01:23,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137356299] [2023-04-01 03:01:23,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:01:23,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:23,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:23,647 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:01:23,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 03:01:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:01:23,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 03:01:23,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-04-01 03:01:23,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:01:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-04-01 03:01:23,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137356299] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:01:23,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [115808587] [2023-04-01 03:01:23,937 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 03:01:23,938 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:01:23,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:01:23,938 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:01:23,938 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:01:23,958 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:01:24,073 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:01:24,093 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:01:24,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:01:24,100 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:01:24,773 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3313#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~a~0.base_BEFORE_CALL_60 Int) (v_main_~i~0_BEFORE_CALL_80 Int)) (and (< ~N~0 (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_60) (* v_main_~i~0_BEFORE_CALL_80 4))) (<= ~N~0 (+ 2147483647 v_main_~i~0_BEFORE_CALL_80)) (<= 0 v_main_~i~0_BEFORE_CALL_80) (<= 1 (+ v_main_~i~0_BEFORE_CALL_80 ~N~0)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_80 |#StackHeapBarrier|)) (< v_main_~i~0_BEFORE_CALL_80 ~N~0) (<= (+ v_main_~a~0.base_BEFORE_CALL_60 1) |#StackHeapBarrier|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:01:24,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:01:24,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 03:01:24,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-04-01 03:01:24,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882096177] [2023-04-01 03:01:24,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 03:01:24,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 03:01:24,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:01:24,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 03:01:24,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 03:01:24,775 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 11 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-04-01 03:01:24,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:01:24,945 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2023-04-01 03:01:24,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 03:01:24,946 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 11 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 53 [2023-04-01 03:01:24,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:01:24,946 INFO L225 Difference]: With dead ends: 133 [2023-04-01 03:01:24,946 INFO L226 Difference]: Without dead ends: 62 [2023-04-01 03:01:24,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 128 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=1358, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 03:01:24,947 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:01:24,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 114 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:01:24,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-04-01 03:01:24,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2023-04-01 03:01:24,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 03:01:24,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2023-04-01 03:01:24,960 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2023-04-01 03:01:24,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:01:24,961 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2023-04-01 03:01:24,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 11 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-04-01 03:01:24,961 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2023-04-01 03:01:24,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 03:01:24,965 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:24,965 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:01:24,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 03:01:25,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 03:01:25,171 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:25,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:25,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1346356406, now seen corresponding path program 8 times [2023-04-01 03:01:25,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:25,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853779299] [2023-04-01 03:01:25,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:25,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:01:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 03:01:25,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:01:25,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853779299] [2023-04-01 03:01:25,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853779299] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:01:25,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078427539] [2023-04-01 03:01:25,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:01:25,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:25,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:25,814 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:01:25,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 03:01:26,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 03:01:26,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:01:26,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-01 03:01:26,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:26,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 52 [2023-04-01 03:01:26,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-04-01 03:01:27,251 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 03:01:27,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-04-01 03:01:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-04-01 03:01:27,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:01:27,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078427539] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:01:27,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1789192938] [2023-04-01 03:01:27,757 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 03:01:27,757 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:01:27,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:01:27,758 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:01:27,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:01:27,782 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:01:27,921 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:01:27,939 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:01:27,942 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:01:27,947 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:01:28,936 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3854#(and (<= 1 |#StackHeapBarrier|) (exists ((v_main_~a~0.base_BEFORE_CALL_71 Int) (v_main_~i~0_BEFORE_CALL_91 Int)) (and (< ~N~0 (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_71) (* v_main_~i~0_BEFORE_CALL_91 4))) (<= (+ v_main_~a~0.base_BEFORE_CALL_71 1) |#StackHeapBarrier|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_91 |#StackHeapBarrier|)) (< v_main_~i~0_BEFORE_CALL_91 ~N~0) (<= 1 (+ v_main_~i~0_BEFORE_CALL_91 ~N~0)) (<= ~N~0 (+ 2147483647 v_main_~i~0_BEFORE_CALL_91)) (<= 0 v_main_~i~0_BEFORE_CALL_91))) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:01:28,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:01:28,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:01:28,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 39 [2023-04-01 03:01:28,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832978533] [2023-04-01 03:01:28,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:01:28,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-01 03:01:28,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:01:28,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-01 03:01:28,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2986, Unknown=1, NotChecked=0, Total=3192 [2023-04-01 03:01:28,938 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 39 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 37 states have internal predecessors, (56), 11 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-04-01 03:01:31,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:01:31,554 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2023-04-01 03:01:31,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-04-01 03:01:31,556 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 37 states have internal predecessors, (56), 11 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 55 [2023-04-01 03:01:31,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:01:31,557 INFO L225 Difference]: With dead ends: 124 [2023-04-01 03:01:31,557 INFO L226 Difference]: Without dead ends: 86 [2023-04-01 03:01:31,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 78 SyntacticMatches, 7 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=769, Invalid=7972, Unknown=1, NotChecked=0, Total=8742 [2023-04-01 03:01:31,559 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 167 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 254 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:01:31,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 247 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 942 Invalid, 1 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 03:01:31,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-04-01 03:01:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2023-04-01 03:01:31,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 58 states have internal predecessors, (60), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 03:01:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2023-04-01 03:01:31,579 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 55 [2023-04-01 03:01:31,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:01:31,579 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2023-04-01 03:01:31,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 37 states have internal predecessors, (56), 11 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-04-01 03:01:31,580 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2023-04-01 03:01:31,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 03:01:31,583 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:31,583 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:01:31,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 03:01:31,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 03:01:31,790 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:31,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:31,791 INFO L85 PathProgramCache]: Analyzing trace with hash 750020598, now seen corresponding path program 9 times [2023-04-01 03:01:31,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:31,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828890603] [2023-04-01 03:01:31,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:31,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:01:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-01 03:01:31,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:01:31,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828890603] [2023-04-01 03:01:31,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828890603] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:01:31,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718429787] [2023-04-01 03:01:31,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:01:31,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:31,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:31,989 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:01:31,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 03:01:32,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:01:32,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:01:32,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 45 conjunts are in the unsatisfiable core [2023-04-01 03:01:32,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:32,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2023-04-01 03:01:32,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 03:01:32,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-04-01 03:01:32,196 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-04-01 03:01:32,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 70 [2023-04-01 03:01:32,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-04-01 03:01:32,244 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-04-01 03:01:32,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 70 [2023-04-01 03:01:32,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2023-04-01 03:01:32,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-04-01 03:01:32,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-04-01 03:01:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 03:01:32,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:01:47,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:01:47,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 73 treesize of output 58 [2023-04-01 03:01:47,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 63 [2023-04-01 03:01:47,189 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 03:01:47,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 80 [2023-04-01 03:01:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 8 proven. 54 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-04-01 03:01:47,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718429787] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:01:47,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [655902423] [2023-04-01 03:01:47,231 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 03:01:47,231 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:01:47,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:01:47,231 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:01:47,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:01:47,270 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:01:47,518 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:01:47,539 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:01:47,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:01:47,549 INFO L180 IcfgInterpreter]: Interpretation finished