/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 IntervalDomain -i ../sv-benchmarks/c/verifythis/duplets.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:08:14,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:08:14,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:08:14,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:08:14,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:08:14,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:08:14,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:08:14,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:08:14,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:08:14,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:08:14,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:08:14,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:08:14,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:08:14,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:08:14,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:08:14,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:08:14,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:08:14,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:08:14,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:08:14,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:08:14,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:08:14,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:08:14,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:08:14,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:08:14,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:08:14,121 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:08:14,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:08:14,122 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:08:14,123 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:08:14,123 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:08:14,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:08:14,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:08:14,125 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:08:14,126 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:08:14,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:08:14,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:08:14,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:08:14,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:08:14,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:08:14,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:08:14,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:08:14,129 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 [2023-03-31 23:08:14,155 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:08:14,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:08:14,156 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:08:14,156 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:08:14,157 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:08:14,157 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:08:14,157 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:08:14,157 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:08:14,157 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:08:14,157 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:08:14,158 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:08:14,158 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:08:14,158 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:08:14,159 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:08:14,159 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:08:14,159 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:08:14,159 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:08:14,159 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:08:14,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:08:14,160 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:08:14,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:08:14,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:08:14,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:08:14,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:08:14,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:08:14,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:08:14,161 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:08:14,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:08:14,161 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:08:14,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:08:14,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:08:14,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:08:14,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:08:14,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:08:14,162 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:08:14,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:08:14,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:08:14,162 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:08:14,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:08:14,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:08:14,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:08:14,163 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:08:14,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:08:14,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:08:14,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:08:14,375 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:08:14,375 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:08:14,376 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/duplets.c [2023-03-31 23:08:15,566 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:08:15,729 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:08:15,729 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/duplets.c [2023-03-31 23:08:15,735 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90a875208/cf99c154ddac4df2aae0eb7d37cb7732/FLAG0385a1502 [2023-03-31 23:08:15,746 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90a875208/cf99c154ddac4df2aae0eb7d37cb7732 [2023-03-31 23:08:15,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:08:15,749 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:08:15,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:08:15,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:08:15,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:08:15,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:08:15" (1/1) ... [2023-03-31 23:08:15,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@525c43b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:15, skipping insertion in model container [2023-03-31 23:08:15,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:08:15" (1/1) ... [2023-03-31 23:08:15,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:08:15,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:08:15,897 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/verifythis/duplets.c[485,498] [2023-03-31 23:08:15,938 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:08:15,952 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:08:15,962 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/verifythis/duplets.c[485,498] [2023-03-31 23:08:15,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:08:16,005 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:08:16,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:16 WrapperNode [2023-03-31 23:08:16,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:08:16,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:08:16,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:08:16,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:08:16,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:16" (1/1) ... [2023-03-31 23:08:16,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:16" (1/1) ... [2023-03-31 23:08:16,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:16" (1/1) ... [2023-03-31 23:08:16,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:16" (1/1) ... [2023-03-31 23:08:16,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:16" (1/1) ... [2023-03-31 23:08:16,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:16" (1/1) ... [2023-03-31 23:08:16,051 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:16" (1/1) ... [2023-03-31 23:08:16,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:16" (1/1) ... [2023-03-31 23:08:16,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:08:16,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:08:16,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:08:16,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:08:16,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:16" (1/1) ... [2023-03-31 23:08:16,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:08:16,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:08:16,085 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) [2023-03-31 23:08:16,090 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 [2023-03-31 23:08:16,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:08:16,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:08:16,113 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:08:16,113 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:08:16,113 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 23:08:16,114 INFO L138 BoogieDeclarations]: Found implementation of procedure mkdup [2023-03-31 23:08:16,114 INFO L138 BoogieDeclarations]: Found implementation of procedure finddup [2023-03-31 23:08:16,114 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:08:16,114 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-03-31 23:08:16,114 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-03-31 23:08:16,114 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 23:08:16,114 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:08:16,114 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:08:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:08:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:08:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:08:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:08:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 23:08:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure mkdup [2023-03-31 23:08:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:08:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure finddup [2023-03-31 23:08:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:08:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:08:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 23:08:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 23:08:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-03-31 23:08:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:08:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:08:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:08:16,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:08:16,188 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:08:16,189 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:08:16,441 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:08:16,481 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:08:16,481 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 23:08:16,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:08:16 BoogieIcfgContainer [2023-03-31 23:08:16,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:08:16,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:08:16,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:08:16,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:08:16,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:08:15" (1/3) ... [2023-03-31 23:08:16,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149b75ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:08:16, skipping insertion in model container [2023-03-31 23:08:16,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:16" (2/3) ... [2023-03-31 23:08:16,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149b75ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:08:16, skipping insertion in model container [2023-03-31 23:08:16,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:08:16" (3/3) ... [2023-03-31 23:08:16,490 INFO L112 eAbstractionObserver]: Analyzing ICFG duplets.c [2023-03-31 23:08:16,505 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:08:16,505 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:08:16,544 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:08:16,550 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;@7c5fd887, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:08:16,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:08:16,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-31 23:08:16,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-03-31 23:08:16,564 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:08:16,564 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:08:16,565 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:08:16,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:08:16,569 INFO L85 PathProgramCache]: Analyzing trace with hash -565806888, now seen corresponding path program 1 times [2023-03-31 23:08:16,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:08:16,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542198789] [2023-03-31 23:08:16,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:16,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:08:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:08:17,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:08:17,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542198789] [2023-03-31 23:08:17,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542198789] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:08:17,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320518861] [2023-03-31 23:08:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:17,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:17,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:08:17,199 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) [2023-03-31 23:08:17,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:08:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:17,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-31 23:08:17,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:08:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:08:17,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:08:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:08:17,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320518861] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:08:17,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [20538805] [2023-03-31 23:08:17,741 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-03-31 23:08:17,742 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:08:17,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:08:17,749 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:08:17,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:08:17,818 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 23:08:18,301 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2023-03-31 23:08:18,307 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 43 for LOIs [2023-03-31 23:08:18,314 INFO L197 IcfgInterpreter]: Interpreting procedure mkdup with input of size 17 for LOIs [2023-03-31 23:08:18,496 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:08:18,497 INFO L197 IcfgInterpreter]: Interpreting procedure finddup with input of size 48 for LOIs [2023-03-31 23:08:18,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:08:18,529 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:08:19,892 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '281#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:08:19,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:08:19,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 23:08:19,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2023-03-31 23:08:19,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731189582] [2023-03-31 23:08:19,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 23:08:19,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 23:08:19,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:08:19,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 23:08:19,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2023-03-31 23:08:19,929 INFO L87 Difference]: Start difference. First operand has 48 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 11 states, 8 states have (on average 2.75) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-03-31 23:08:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:08:20,090 INFO L93 Difference]: Finished difference Result 77 states and 99 transitions. [2023-03-31 23:08:20,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:08:20,092 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 37 [2023-03-31 23:08:20,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:08:20,099 INFO L225 Difference]: With dead ends: 77 [2023-03-31 23:08:20,099 INFO L226 Difference]: Without dead ends: 51 [2023-03-31 23:08:20,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2023-03-31 23:08:20,105 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 18 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:08:20,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 263 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:08:20,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-03-31 23:08:20,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2023-03-31 23:08:20,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-03-31 23:08:20,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2023-03-31 23:08:20,137 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 37 [2023-03-31 23:08:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:08:20,138 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2023-03-31 23:08:20,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-03-31 23:08:20,139 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2023-03-31 23:08:20,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-03-31 23:08:20,140 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:08:20,140 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:08:20,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 23:08:20,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-03-31 23:08:20,347 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:08:20,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:08:20,347 INFO L85 PathProgramCache]: Analyzing trace with hash 379806831, now seen corresponding path program 1 times [2023-03-31 23:08:20,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:08:20,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935936745] [2023-03-31 23:08:20,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:20,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:08:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:08:20,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:08:20,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935936745] [2023-03-31 23:08:20,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935936745] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:08:20,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:08:20,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:08:20,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626098429] [2023-03-31 23:08:20,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:08:20,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:08:20,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:08:20,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:08:20,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:08:20,477 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-03-31 23:08:20,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:08:20,541 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2023-03-31 23:08:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:08:20,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 39 [2023-03-31 23:08:20,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:08:20,543 INFO L225 Difference]: With dead ends: 63 [2023-03-31 23:08:20,543 INFO L226 Difference]: Without dead ends: 61 [2023-03-31 23:08:20,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:08:20,544 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:08:20,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 245 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:08:20,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-03-31 23:08:20,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2023-03-31 23:08:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-03-31 23:08:20,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2023-03-31 23:08:20,560 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 39 [2023-03-31 23:08:20,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:08:20,561 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2023-03-31 23:08:20,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-03-31 23:08:20,561 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2023-03-31 23:08:20,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-03-31 23:08:20,564 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:08:20,564 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:08:20,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 23:08:20,564 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:08:20,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:08:20,565 INFO L85 PathProgramCache]: Analyzing trace with hash 899567769, now seen corresponding path program 1 times [2023-03-31 23:08:20,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:08:20,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493839723] [2023-03-31 23:08:20,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:20,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:08:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:08:21,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:08:21,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493839723] [2023-03-31 23:08:21,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493839723] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:08:21,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503473390] [2023-03-31 23:08:21,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:21,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:21,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:08:21,056 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) [2023-03-31 23:08:21,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:08:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:21,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 22 conjunts are in the unsatisfiable core [2023-03-31 23:08:21,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:08:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:08:21,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:08:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:08:21,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503473390] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 23:08:21,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:08:21,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2023-03-31 23:08:21,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794590634] [2023-03-31 23:08:21,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:08:21,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 23:08:21,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:08:21,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 23:08:21,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2023-03-31 23:08:21,707 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 11 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-03-31 23:08:21,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:08:21,873 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2023-03-31 23:08:21,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 23:08:21,877 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 39 [2023-03-31 23:08:21,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:08:21,878 INFO L225 Difference]: With dead ends: 87 [2023-03-31 23:08:21,878 INFO L226 Difference]: Without dead ends: 58 [2023-03-31 23:08:21,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2023-03-31 23:08:21,879 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:08:21,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 252 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:08:21,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-03-31 23:08:21,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2023-03-31 23:08:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 32 states have internal predecessors, (34), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-03-31 23:08:21,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2023-03-31 23:08:21,887 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 39 [2023-03-31 23:08:21,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:08:21,887 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2023-03-31 23:08:21,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-03-31 23:08:21,888 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2023-03-31 23:08:21,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-31 23:08:21,892 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:08:21,892 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:08:21,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 23:08:22,097 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 [2023-03-31 23:08:22,098 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:08:22,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:08:22,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1344332587, now seen corresponding path program 1 times [2023-03-31 23:08:22,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:08:22,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564147112] [2023-03-31 23:08:22,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:22,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:08:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:08:22,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:08:22,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564147112] [2023-03-31 23:08:22,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564147112] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:08:22,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399570073] [2023-03-31 23:08:22,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:22,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:22,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:08:22,159 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) [2023-03-31 23:08:22,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:08:22,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:22,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 23:08:22,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:08:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:08:22,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:08:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:08:22,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399570073] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:08:22,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [299925118] [2023-03-31 23:08:22,304 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-03-31 23:08:22,305 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:08:22,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:08:22,305 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:08:22,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:08:22,322 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 23:08:22,581 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2023-03-31 23:08:22,584 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 43 for LOIs [2023-03-31 23:08:22,588 INFO L197 IcfgInterpreter]: Interpreting procedure mkdup with input of size 17 for LOIs [2023-03-31 23:08:22,683 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:08:22,684 INFO L197 IcfgInterpreter]: Interpreting procedure finddup with input of size 48 for LOIs [2023-03-31 23:08:22,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:08:22,872 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:08:24,056 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1381#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:08:24,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:08:24,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 23:08:24,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-03-31 23:08:24,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115376906] [2023-03-31 23:08:24,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 23:08:24,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:08:24,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:08:24,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:08:24,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2023-03-31 23:08:24,058 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-03-31 23:08:24,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:08:24,108 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2023-03-31 23:08:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 23:08:24,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 41 [2023-03-31 23:08:24,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:08:24,110 INFO L225 Difference]: With dead ends: 74 [2023-03-31 23:08:24,110 INFO L226 Difference]: Without dead ends: 56 [2023-03-31 23:08:24,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2023-03-31 23:08:24,112 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:08:24,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 122 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:08:24,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-03-31 23:08:24,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-03-31 23:08:24,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-03-31 23:08:24,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2023-03-31 23:08:24,119 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 41 [2023-03-31 23:08:24,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:08:24,119 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2023-03-31 23:08:24,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-03-31 23:08:24,119 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2023-03-31 23:08:24,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-03-31 23:08:24,120 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:08:24,120 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:08:24,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:08:24,325 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 [2023-03-31 23:08:24,326 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:08:24,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:08:24,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1702399444, now seen corresponding path program 2 times [2023-03-31 23:08:24,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:08:24,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167171397] [2023-03-31 23:08:24,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:24,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:08:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 23:08:25,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:08:25,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167171397] [2023-03-31 23:08:25,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167171397] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:08:25,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531653052] [2023-03-31 23:08:25,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:08:25,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:25,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:08:25,629 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:08:25,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:08:25,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-31 23:08:25,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:08:25,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 56 conjunts are in the unsatisfiable core [2023-03-31 23:08:25,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:08:25,897 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-03-31 23:08:25,898 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 1 case distinctions, treesize of input 22 treesize of output 23 [2023-03-31 23:08:26,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:08:26,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:08:26,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531653052] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:08:26,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1304246431] [2023-03-31 23:08:26,496 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-03-31 23:08:26,496 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:08:26,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:08:26,497 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:08:26,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:08:26,511 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 23:08:26,743 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2023-03-31 23:08:26,746 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 43 for LOIs [2023-03-31 23:08:26,751 INFO L197 IcfgInterpreter]: Interpreting procedure mkdup with input of size 17 for LOIs [2023-03-31 23:08:26,841 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:08:26,842 INFO L197 IcfgInterpreter]: Interpreting procedure finddup with input of size 48 for LOIs [2023-03-31 23:08:26,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:08:26,995 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:08:28,592 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1782#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:08:28,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:08:28,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:08:28,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2023-03-31 23:08:28,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015323093] [2023-03-31 23:08:28,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:08:28,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-03-31 23:08:28,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:08:28,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-03-31 23:08:28,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=3206, Unknown=0, NotChecked=0, Total=3422 [2023-03-31 23:08:28,596 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 30 states, 20 states have (on average 1.85) internal successors, (37), 23 states have internal predecessors, (37), 12 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2023-03-31 23:08:31,659 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] [2023-03-31 23:08:32,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:08:32,278 INFO L93 Difference]: Finished difference Result 122 states and 161 transitions. [2023-03-31 23:08:32,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-03-31 23:08:32,278 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 20 states have (on average 1.85) internal successors, (37), 23 states have internal predecessors, (37), 12 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) Word has length 43 [2023-03-31 23:08:32,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:08:32,280 INFO L225 Difference]: With dead ends: 122 [2023-03-31 23:08:32,280 INFO L226 Difference]: Without dead ends: 80 [2023-03-31 23:08:32,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1609 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=365, Invalid=5487, Unknown=0, NotChecked=0, Total=5852 [2023-03-31 23:08:32,283 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 112 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-31 23:08:32,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 363 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1175 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2023-03-31 23:08:32,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-03-31 23:08:32,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2023-03-31 23:08:32,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 39 states have internal predecessors, (45), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-03-31 23:08:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2023-03-31 23:08:32,294 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 43 [2023-03-31 23:08:32,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:08:32,294 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2023-03-31 23:08:32,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 20 states have (on average 1.85) internal successors, (37), 23 states have internal predecessors, (37), 12 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2023-03-31 23:08:32,294 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2023-03-31 23:08:32,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 23:08:32,295 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:08:32,295 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:08:32,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 23:08:32,501 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 [2023-03-31 23:08:32,501 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:08:32,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:08:32,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1808366946, now seen corresponding path program 1 times [2023-03-31 23:08:32,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:08:32,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387282677] [2023-03-31 23:08:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:32,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:08:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:08:33,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:08:33,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387282677] [2023-03-31 23:08:33,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387282677] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:08:33,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485073195] [2023-03-31 23:08:33,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:33,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:33,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:08:33,081 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) [2023-03-31 23:08:33,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 23:08:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:33,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 47 conjunts are in the unsatisfiable core [2023-03-31 23:08:33,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:08:33,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-03-31 23:08:33,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-03-31 23:08:33,301 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-03-31 23:08:33,301 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 1 case distinctions, treesize of input 23 treesize of output 27 [2023-03-31 23:08:33,306 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 13 treesize of output 9 [2023-03-31 23:08:33,561 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 54 treesize of output 38 [2023-03-31 23:08:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:08:33,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:08:33,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 23:08:33,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2023-03-31 23:08:33,870 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 66 treesize of output 50 [2023-03-31 23:08:33,874 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 23 treesize of output 19 [2023-03-31 23:08:33,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 23:08:33,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-03-31 23:08:33,953 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 23:08:33,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2023-03-31 23:08:33,959 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 [2023-03-31 23:08:33,977 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 23:08:33,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2023-03-31 23:08:33,981 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 23:08:33,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-03-31 23:08:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:08:34,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485073195] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:08:34,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1214670034] [2023-03-31 23:08:34,148 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2023-03-31 23:08:34,149 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:08:34,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:08:34,149 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:08:34,149 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:08:34,163 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 23:08:34,425 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-03-31 23:08:34,432 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 43 for LOIs [2023-03-31 23:08:34,435 INFO L197 IcfgInterpreter]: Interpreting procedure mkdup with input of size 17 for LOIs [2023-03-31 23:08:34,519 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:08:34,520 INFO L197 IcfgInterpreter]: Interpreting procedure finddup with input of size 48 for LOIs [2023-03-31 23:08:34,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:08:34,565 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:08:51,188 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2425#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:08:51,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:08:51,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 23:08:51,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14] total 35 [2023-03-31 23:08:51,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383259307] [2023-03-31 23:08:51,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 23:08:51,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-03-31 23:08:51,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:08:51,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-03-31 23:08:51,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=3866, Unknown=8, NotChecked=0, Total=4160 [2023-03-31 23:08:51,191 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 35 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 27 states have internal predecessors, (44), 7 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2023-03-31 23:08:54,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-31 23:08:56,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-31 23:08:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:08:57,321 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2023-03-31 23:08:57,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-03-31 23:08:57,322 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 27 states have internal predecessors, (44), 7 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 45 [2023-03-31 23:08:57,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:08:57,323 INFO L225 Difference]: With dead ends: 95 [2023-03-31 23:08:57,323 INFO L226 Difference]: Without dead ends: 93 [2023-03-31 23:08:57,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2214 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=589, Invalid=7235, Unknown=8, NotChecked=0, Total=7832 [2023-03-31 23:08:57,326 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 121 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 79 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:08:57,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 390 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 712 Invalid, 3 Unknown, 0 Unchecked, 5.3s Time] [2023-03-31 23:08:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-03-31 23:08:57,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 69. [2023-03-31 23:08:57,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 45 states have internal predecessors, (52), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-03-31 23:08:57,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2023-03-31 23:08:57,340 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 45 [2023-03-31 23:08:57,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:08:57,340 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2023-03-31 23:08:57,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 27 states have internal predecessors, (44), 7 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2023-03-31 23:08:57,340 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2023-03-31 23:08:57,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 23:08:57,341 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:08:57,341 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:08:57,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 23:08:57,546 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 [2023-03-31 23:08:57,546 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:08:57,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:08:57,547 INFO L85 PathProgramCache]: Analyzing trace with hash 262218239, now seen corresponding path program 3 times [2023-03-31 23:08:57,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:08:57,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871727297] [2023-03-31 23:08:57,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:57,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:08:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-31 23:08:57,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:08:57,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871727297] [2023-03-31 23:08:57,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871727297] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:08:57,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366632534] [2023-03-31 23:08:57,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 23:08:57,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:57,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:08:57,625 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) [2023-03-31 23:08:57,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 23:08:57,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 23:08:57,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:08:57,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 23:08:57,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:08:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-31 23:08:57,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:08:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-31 23:08:57,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366632534] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:08:57,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [266101328] [2023-03-31 23:08:57,767 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-03-31 23:08:57,767 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:08:57,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:08:57,768 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:08:57,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:08:57,791 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 23:08:57,995 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2023-03-31 23:08:57,999 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 43 for LOIs [2023-03-31 23:08:58,002 INFO L197 IcfgInterpreter]: Interpreting procedure mkdup with input of size 17 for LOIs [2023-03-31 23:08:58,080 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:08:58,081 INFO L197 IcfgInterpreter]: Interpreting procedure finddup with input of size 48 for LOIs [2023-03-31 23:08:58,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:08:58,213 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:08:59,369 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3033#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:08:59,369 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:08:59,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 23:08:59,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2023-03-31 23:08:59,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295280863] [2023-03-31 23:08:59,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 23:08:59,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:08:59,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:08:59,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:08:59,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2023-03-31 23:08:59,371 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-03-31 23:08:59,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:08:59,450 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2023-03-31 23:08:59,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:08:59,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 47 [2023-03-31 23:08:59,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:08:59,454 INFO L225 Difference]: With dead ends: 115 [2023-03-31 23:08:59,454 INFO L226 Difference]: Without dead ends: 76 [2023-03-31 23:08:59,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=148, Invalid=1334, Unknown=0, NotChecked=0, Total=1482 [2023-03-31 23:08:59,455 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 13 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:08:59,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 209 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:08:59,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-03-31 23:08:59,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2023-03-31 23:08:59,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 46 states have internal predecessors, (53), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-03-31 23:08:59,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2023-03-31 23:08:59,470 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 47 [2023-03-31 23:08:59,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:08:59,470 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2023-03-31 23:08:59,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-03-31 23:08:59,470 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2023-03-31 23:08:59,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-03-31 23:08:59,471 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:08:59,471 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:08:59,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 23:08:59,676 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 [2023-03-31 23:08:59,677 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:08:59,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:08:59,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1256682193, now seen corresponding path program 4 times [2023-03-31 23:08:59,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:08:59,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863132676] [2023-03-31 23:08:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:59,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:08:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:09:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-31 23:09:03,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:09:03,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863132676] [2023-03-31 23:09:03,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863132676] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:09:03,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861079632] [2023-03-31 23:09:03,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 23:09:03,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:09:03,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:09:03,441 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) [2023-03-31 23:09:03,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 23:09:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:09:03,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 73 conjunts are in the unsatisfiable core [2023-03-31 23:09:03,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:09:03,542 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 7 treesize of output 6 [2023-03-31 23:09:03,675 WARN L861 $PredicateComparison]: unable to prove that (exists ((mkdup_~j~0 Int) (mkdup_~x~0 Int) (mkdup_~i~0 Int)) (and (< mkdup_~j~0 |c_mkdup_#in~n|) (<= 0 mkdup_~j~0) (= (store |c_old(#memory_int)| |c_mkdup_#in~a.base| (store (store (select |c_old(#memory_int)| |c_mkdup_#in~a.base|) (+ |c_mkdup_#in~a.offset| (* mkdup_~i~0 4)) mkdup_~x~0) (+ (* mkdup_~j~0 4) |c_mkdup_#in~a.offset|) mkdup_~x~0)) |c_#memory_int|))) is different from true [2023-03-31 23:09:03,681 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 29 treesize of output 24 [2023-03-31 23:09:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 23:09:04,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:09:18,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861079632] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:09:18,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [838723444] [2023-03-31 23:09:18,256 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-03-31 23:09:18,256 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:09:18,256 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:09:18,256 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:09:18,256 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:09:18,269 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 23:09:18,475 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2023-03-31 23:09:18,478 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 43 for LOIs [2023-03-31 23:09:18,483 INFO L197 IcfgInterpreter]: Interpreting procedure mkdup with input of size 17 for LOIs