/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/array-crafted/mapavg1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:49:29,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:49:29,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:49:29,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:49:29,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:49:29,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:49:29,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:49:29,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:49:29,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:49:29,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:49:29,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:49:29,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:49:29,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:49:29,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:49:29,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:49:29,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:49:29,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:49:29,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:49:29,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:49:29,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:49:29,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:49:29,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:49:29,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:49:29,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:49:29,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 20:49:29,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 20:49:29,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 20:49:29,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 20:49:29,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 20:49:29,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 20:49:29,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:49:29,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:49:29,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:49:29,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:49:29,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:49:29,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:49:29,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:49:29,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:49:29,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:49:29,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:49:29,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:49:29,580 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 20:49:29,601 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:49:29,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:49:29,602 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:49:29,602 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:49:29,602 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:49:29,602 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:49:29,603 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:49:29,603 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:49:29,603 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:49:29,603 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:49:29,603 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:49:29,603 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:49:29,603 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:49:29,603 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:49:29,603 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:49:29,603 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:49:29,603 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:49:29,604 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:49:29,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:49:29,604 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:49:29,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:49:29,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:49:29,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:49:29,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:49:29,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:49:29,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:49:29,605 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:49:29,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:49:29,605 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:49:29,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:49:29,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:49:29,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:49:29,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:49:29,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:49:29,605 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:49:29,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:49:29,605 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:49:29,606 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:49:29,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:49:29,606 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:49:29,606 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:49:29,606 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:49:29,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:49:29,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:49:29,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:49:29,757 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:49:29,757 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:49:29,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/mapavg1.i [2023-03-31 20:49:30,642 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:49:30,846 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:49:30,846 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg1.i [2023-03-31 20:49:30,850 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e420ed2ad/20e83a7943c942908eb4c25fde3fd85e/FLAGd4eeab167 [2023-03-31 20:49:30,860 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e420ed2ad/20e83a7943c942908eb4c25fde3fd85e [2023-03-31 20:49:30,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:49:30,862 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:49:30,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:49:30,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:49:30,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:49:30,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:49:30" (1/1) ... [2023-03-31 20:49:30,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b667599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:30, skipping insertion in model container [2023-03-31 20:49:30,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:49:30" (1/1) ... [2023-03-31 20:49:30,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:49:30,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:49:30,974 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg1.i[1306,1319] [2023-03-31 20:49:30,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:49:30,983 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:49:30,996 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg1.i[1306,1319] [2023-03-31 20:49:30,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:49:31,006 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:49:31,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:31 WrapperNode [2023-03-31 20:49:31,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:49:31,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:49:31,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:49:31,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:49:31,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:31" (1/1) ... [2023-03-31 20:49:31,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:31" (1/1) ... [2023-03-31 20:49:31,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:31" (1/1) ... [2023-03-31 20:49:31,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:31" (1/1) ... [2023-03-31 20:49:31,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:31" (1/1) ... [2023-03-31 20:49:31,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:31" (1/1) ... [2023-03-31 20:49:31,030 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:31" (1/1) ... [2023-03-31 20:49:31,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:31" (1/1) ... [2023-03-31 20:49:31,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:49:31,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:49:31,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:49:31,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:49:31,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:31" (1/1) ... [2023-03-31 20:49:31,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:49:31,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:31,057 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 20:49:31,060 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 20:49:31,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:49:31,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:49:31,090 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:49:31,090 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2023-03-31 20:49:31,091 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:49:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:49:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:49:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 20:49:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 20:49:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:49:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:49:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 20:49:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2023-03-31 20:49:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:49:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:49:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:49:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:49:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:49:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:49:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:49:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:49:31,142 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:49:31,143 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:49:31,254 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:49:31,284 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:49:31,284 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-31 20:49:31,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:49:31 BoogieIcfgContainer [2023-03-31 20:49:31,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:49:31,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:49:31,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:49:31,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:49:31,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:49:30" (1/3) ... [2023-03-31 20:49:31,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2c484a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:49:31, skipping insertion in model container [2023-03-31 20:49:31,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:49:31" (2/3) ... [2023-03-31 20:49:31,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2c484a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:49:31, skipping insertion in model container [2023-03-31 20:49:31,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:49:31" (3/3) ... [2023-03-31 20:49:31,292 INFO L112 eAbstractionObserver]: Analyzing ICFG mapavg1.i [2023-03-31 20:49:31,304 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:49:31,304 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:49:31,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:49:31,339 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;@ab0301, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:49:31,339 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:49:31,342 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:49:31,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 20:49:31,348 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:31,348 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:49:31,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:31,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:31,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1758032332, now seen corresponding path program 1 times [2023-03-31 20:49:31,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:31,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365977120] [2023-03-31 20:49:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:31,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 20:49:31,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:31,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365977120] [2023-03-31 20:49:31,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365977120] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:49:31,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:49:31,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 20:49:31,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464985987] [2023-03-31 20:49:31,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:49:31,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:49:31,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:31,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:49:31,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:49:31,649 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:49:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:31,694 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2023-03-31 20:49:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:49:31,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2023-03-31 20:49:31,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:31,701 INFO L225 Difference]: With dead ends: 41 [2023-03-31 20:49:31,701 INFO L226 Difference]: Without dead ends: 20 [2023-03-31 20:49:31,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:49:31,706 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:49:31,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:49:31,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-03-31 20:49:31,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-03-31 20:49:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:49:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-03-31 20:49:31,733 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2023-03-31 20:49:31,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:31,734 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-03-31 20:49:31,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:49:31,734 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-03-31 20:49:31,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 20:49:31,735 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:31,735 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:49:31,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 20:49:31,736 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:31,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:31,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2136114728, now seen corresponding path program 1 times [2023-03-31 20:49:31,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:31,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161413620] [2023-03-31 20:49:31,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:31,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 20:49:31,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:31,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161413620] [2023-03-31 20:49:31,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161413620] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:31,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797193424] [2023-03-31 20:49:31,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:31,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:31,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:31,899 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 20:49:31,934 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 20:49:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:31,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-31 20:49:31,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 20:49:32,020 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:49:32,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797193424] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:49:32,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 20:49:32,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-03-31 20:49:32,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615025699] [2023-03-31 20:49:32,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:49:32,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:49:32,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:32,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:49:32,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 20:49:32,023 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:49:32,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:32,055 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-03-31 20:49:32,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:49:32,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-03-31 20:49:32,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:32,057 INFO L225 Difference]: With dead ends: 33 [2023-03-31 20:49:32,058 INFO L226 Difference]: Without dead ends: 21 [2023-03-31 20:49:32,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 20:49:32,060 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:49:32,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:49:32,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-03-31 20:49:32,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-03-31 20:49:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:49:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-03-31 20:49:32,069 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2023-03-31 20:49:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:32,069 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-03-31 20:49:32,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:49:32,069 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-03-31 20:49:32,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 20:49:32,070 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:32,070 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:49:32,095 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 20:49:32,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:32,279 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:32,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:32,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1667861185, now seen corresponding path program 1 times [2023-03-31 20:49:32,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:32,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241858083] [2023-03-31 20:49:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:32,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 20:49:32,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:32,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241858083] [2023-03-31 20:49:32,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241858083] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:32,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990510229] [2023-03-31 20:49:32,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:32,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:32,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:32,378 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 20:49:32,379 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 20:49:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:32,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-31 20:49:32,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:49:32,481 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:49:32,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990510229] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:49:32,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 20:49:32,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-03-31 20:49:32,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693786599] [2023-03-31 20:49:32,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:49:32,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:49:32,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:32,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:49:32,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 20:49:32,482 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:49:32,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:32,502 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-03-31 20:49:32,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:49:32,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-03-31 20:49:32,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:32,504 INFO L225 Difference]: With dead ends: 31 [2023-03-31 20:49:32,504 INFO L226 Difference]: Without dead ends: 22 [2023-03-31 20:49:32,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 20:49:32,507 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:49:32,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:49:32,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-03-31 20:49:32,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-03-31 20:49:32,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:49:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-03-31 20:49:32,518 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2023-03-31 20:49:32,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:32,519 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-03-31 20:49:32,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:49:32,520 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-03-31 20:49:32,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 20:49:32,521 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:32,521 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:49:32,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 20:49:32,725 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 20:49:32,728 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:32,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:32,729 INFO L85 PathProgramCache]: Analyzing trace with hash -636160548, now seen corresponding path program 1 times [2023-03-31 20:49:32,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:32,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173739397] [2023-03-31 20:49:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:32,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 20:49:32,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:32,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173739397] [2023-03-31 20:49:32,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173739397] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:32,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314044320] [2023-03-31 20:49:32,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:32,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:32,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:32,806 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 20:49:32,807 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 20:49:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:32,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:49:32,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 20:49:32,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:49:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 20:49:32,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314044320] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:49:32,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1262488318] [2023-03-31 20:49:32,929 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:49:32,929 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:49:32,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:49:32,935 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:49:32,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:49:32,985 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:49:33,685 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:49:33,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:49:33,749 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:49:34,224 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '631#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (<= 100 main_~i~1) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 99 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:49:34,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:49:34,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:49:34,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-03-31 20:49:34,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075762753] [2023-03-31 20:49:34,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:49:34,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 20:49:34,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:34,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 20:49:34,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-03-31 20:49:34,226 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:49:34,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:34,252 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-03-31 20:49:34,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 20:49:34,255 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 29 [2023-03-31 20:49:34,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:34,255 INFO L225 Difference]: With dead ends: 40 [2023-03-31 20:49:34,255 INFO L226 Difference]: Without dead ends: 25 [2023-03-31 20:49:34,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-03-31 20:49:34,256 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:49:34,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:49:34,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-03-31 20:49:34,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-03-31 20:49:34,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:49:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-03-31 20:49:34,262 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2023-03-31 20:49:34,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:34,262 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-03-31 20:49:34,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:49:34,262 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-03-31 20:49:34,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-03-31 20:49:34,263 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:34,263 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:49:34,268 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 20:49:34,470 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 20:49:34,471 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:34,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:34,471 INFO L85 PathProgramCache]: Analyzing trace with hash 539477304, now seen corresponding path program 2 times [2023-03-31 20:49:34,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:34,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132879998] [2023-03-31 20:49:34,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:34,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 20:49:34,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:34,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132879998] [2023-03-31 20:49:34,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132879998] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:34,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723558331] [2023-03-31 20:49:34,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:49:34,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:34,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:34,578 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 20:49:34,580 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 20:49:34,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 20:49:34,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:49:34,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:49:34,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 20:49:34,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:49:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 20:49:34,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723558331] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:49:34,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1642306476] [2023-03-31 20:49:34,679 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:49:34,679 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:49:34,680 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:49:34,680 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:49:34,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:49:34,695 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:49:35,085 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:49:35,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:49:35,141 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:49:35,578 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '950#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (<= 100 main_~i~1) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 99 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:49:35,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:49:35,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:49:35,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-03-31 20:49:35,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573567478] [2023-03-31 20:49:35,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:49:35,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 20:49:35,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:35,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 20:49:35,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-03-31 20:49:35,579 INFO L87 Difference]: Start difference. First operand 25 states and 29 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, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:49:35,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:35,605 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-03-31 20:49:35,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 20:49:35,606 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, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 32 [2023-03-31 20:49:35,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:35,606 INFO L225 Difference]: With dead ends: 42 [2023-03-31 20:49:35,606 INFO L226 Difference]: Without dead ends: 28 [2023-03-31 20:49:35,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-03-31 20:49:35,607 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:49:35,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:49:35,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-03-31 20:49:35,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-03-31 20:49:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:49:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-03-31 20:49:35,610 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 32 [2023-03-31 20:49:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:35,610 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-03-31 20:49:35,610 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, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:49:35,611 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-03-31 20:49:35,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-31 20:49:35,611 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:35,611 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:49:35,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-03-31 20:49:35,812 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 20:49:35,812 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:35,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:35,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1310781763, now seen corresponding path program 3 times [2023-03-31 20:49:35,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:35,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315061936] [2023-03-31 20:49:35,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:35,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-03-31 20:49:35,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:35,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315061936] [2023-03-31 20:49:35,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315061936] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:35,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025417275] [2023-03-31 20:49:35,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:49:35,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:35,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:35,885 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 20:49:35,887 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 20:49:35,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:49:35,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:49:35,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 20:49:35,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 20:49:35,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:49:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 20:49:36,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025417275] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:49:36,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [467777329] [2023-03-31 20:49:36,036 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:49:36,036 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:49:36,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:49:36,037 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:49:36,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:49:36,048 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:49:36,362 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:49:36,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:49:36,396 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:49:36,825 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1340#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (<= 100 main_~i~1) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 99 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:49:36,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:49:36,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:49:36,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-03-31 20:49:36,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135049740] [2023-03-31 20:49:36,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:49:36,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 20:49:36,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:36,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 20:49:36,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=713, Unknown=8, NotChecked=0, Total=870 [2023-03-31 20:49:36,827 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-03-31 20:49:36,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:36,860 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2023-03-31 20:49:36,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 20:49:36,861 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 41 [2023-03-31 20:49:36,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:36,861 INFO L225 Difference]: With dead ends: 53 [2023-03-31 20:49:36,861 INFO L226 Difference]: Without dead ends: 35 [2023-03-31 20:49:36,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=713, Unknown=8, NotChecked=0, Total=870 [2023-03-31 20:49:36,862 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:49:36,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:49:36,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-31 20:49:36,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-03-31 20:49:36,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:49:36,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-03-31 20:49:36,866 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 41 [2023-03-31 20:49:36,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:36,866 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-03-31 20:49:36,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-03-31 20:49:36,866 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-03-31 20:49:36,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-03-31 20:49:36,867 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:36,867 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:49:36,874 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 20:49:37,071 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 20:49:37,072 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:37,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:37,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1851771436, now seen corresponding path program 4 times [2023-03-31 20:49:37,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:37,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489402535] [2023-03-31 20:49:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:37,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-03-31 20:49:37,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:37,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489402535] [2023-03-31 20:49:37,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489402535] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:37,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647235777] [2023-03-31 20:49:37,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:49:37,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:37,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:37,243 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 20:49:37,245 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 20:49:37,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:37,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 20:49:37,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-03-31 20:49:37,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:49:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-03-31 20:49:37,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647235777] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:49:37,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [27615438] [2023-03-31 20:49:37,482 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:49:37,482 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:49:37,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:49:37,483 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:49:37,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:49:37,492 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:49:37,778 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:49:37,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:49:37,808 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:49:38,283 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1819#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (<= 100 main_~i~1) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 99 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:49:38,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:49:38,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:49:38,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-03-31 20:49:38,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334933947] [2023-03-31 20:49:38,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:49:38,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-03-31 20:49:38,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:38,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-03-31 20:49:38,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=1254, Unknown=8, NotChecked=0, Total=1640 [2023-03-31 20:49:38,285 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:49:38,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:38,322 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2023-03-31 20:49:38,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-03-31 20:49:38,323 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2023-03-31 20:49:38,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:38,323 INFO L225 Difference]: With dead ends: 66 [2023-03-31 20:49:38,323 INFO L226 Difference]: Without dead ends: 47 [2023-03-31 20:49:38,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=1254, Unknown=8, NotChecked=0, Total=1640 [2023-03-31 20:49:38,324 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:49:38,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:49:38,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-03-31 20:49:38,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-03-31 20:49:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:49:38,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-03-31 20:49:38,328 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 48 [2023-03-31 20:49:38,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:38,328 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-03-31 20:49:38,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:49:38,328 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-03-31 20:49:38,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-31 20:49:38,329 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:38,329 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:49:38,336 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 20:49:38,534 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 20:49:38,534 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:38,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:38,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1977020204, now seen corresponding path program 5 times [2023-03-31 20:49:38,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:38,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444368200] [2023-03-31 20:49:38,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:38,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-03-31 20:49:38,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:38,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444368200] [2023-03-31 20:49:38,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444368200] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:38,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699747043] [2023-03-31 20:49:38,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:49:38,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:38,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:38,978 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 20:49:38,980 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 20:49:39,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 20:49:39,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:49:39,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 20:49:39,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-03-31 20:49:39,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:49:39,203 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-03-31 20:49:39,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699747043] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:49:39,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [542628308] [2023-03-31 20:49:39,206 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:49:39,206 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:49:39,206 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:49:39,206 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:49:39,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:49:39,217 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:49:39,513 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:49:39,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:49:39,542 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:49:40,102 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2430#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (<= 100 main_~i~1) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 99 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:49:40,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:49:40,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:49:40,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-03-31 20:49:40,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633150268] [2023-03-31 20:49:40,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:49:40,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-03-31 20:49:40,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:40,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-03-31 20:49:40,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=2099, Unknown=8, NotChecked=0, Total=2550 [2023-03-31 20:49:40,104 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:49:40,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:40,166 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2023-03-31 20:49:40,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-03-31 20:49:40,167 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 60 [2023-03-31 20:49:40,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:40,167 INFO L225 Difference]: With dead ends: 73 [2023-03-31 20:49:40,168 INFO L226 Difference]: Without dead ends: 54 [2023-03-31 20:49:40,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=443, Invalid=2099, Unknown=8, NotChecked=0, Total=2550 [2023-03-31 20:49:40,169 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:49:40,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:49:40,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-03-31 20:49:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-03-31 20:49:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:49:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2023-03-31 20:49:40,173 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 60 [2023-03-31 20:49:40,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:40,173 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2023-03-31 20:49:40,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:49:40,173 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2023-03-31 20:49:40,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-03-31 20:49:40,174 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:40,174 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:49:40,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 20:49:40,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:40,381 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:40,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:40,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1923610536, now seen corresponding path program 6 times [2023-03-31 20:49:40,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:40,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741988054] [2023-03-31 20:49:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:40,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-03-31 20:49:40,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:40,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741988054] [2023-03-31 20:49:40,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741988054] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:40,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874594151] [2023-03-31 20:49:40,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:49:40,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:40,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:40,919 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:49:40,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 20:49:41,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:49:41,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:49:41,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-31 20:49:41,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-03-31 20:49:41,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:49:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-03-31 20:49:41,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874594151] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:49:41,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1676268245] [2023-03-31 20:49:41,677 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:49:41,678 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:49:41,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:49:41,678 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:49:41,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:49:41,688 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:49:41,993 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:49:42,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:49:42,037 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:49:42,651 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3199#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (<= 100 main_~i~1) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 99 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:49:42,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:49:42,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:49:42,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-03-31 20:49:42,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368522156] [2023-03-31 20:49:42,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:49:42,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-03-31 20:49:42,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:42,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-03-31 20:49:42,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1353, Invalid=3061, Unknown=8, NotChecked=0, Total=4422 [2023-03-31 20:49:42,654 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:49:42,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:42,712 INFO L93 Difference]: Finished difference Result 104 states and 136 transitions. [2023-03-31 20:49:42,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-03-31 20:49:42,713 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 79 [2023-03-31 20:49:42,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:42,713 INFO L225 Difference]: With dead ends: 104 [2023-03-31 20:49:42,713 INFO L226 Difference]: Without dead ends: 79 [2023-03-31 20:49:42,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1353, Invalid=3061, Unknown=8, NotChecked=0, Total=4422 [2023-03-31 20:49:42,715 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:49:42,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:49:42,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-03-31 20:49:42,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-03-31 20:49:42,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:49:42,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2023-03-31 20:49:42,720 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 79 [2023-03-31 20:49:42,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:42,720 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2023-03-31 20:49:42,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:49:42,720 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2023-03-31 20:49:42,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-03-31 20:49:42,724 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:42,725 INFO L195 NwaCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:49:42,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 20:49:42,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-03-31 20:49:42,930 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:42,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:42,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1790244300, now seen corresponding path program 7 times [2023-03-31 20:49:42,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:42,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263998619] [2023-03-31 20:49:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:42,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-03-31 20:49:44,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:44,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263998619] [2023-03-31 20:49:44,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263998619] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:44,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870157215] [2023-03-31 20:49:44,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:49:44,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:44,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:44,423 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:49:44,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 20:49:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:44,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 50 conjunts are in the unsatisfiable core [2023-03-31 20:49:44,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-03-31 20:49:44,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:49:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-03-31 20:49:46,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870157215] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:49:46,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1075417897] [2023-03-31 20:49:46,844 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:49:46,844 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:49:46,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:49:46,844 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:49:46,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:49:46,859 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:49:47,135 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:49:47,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:49:47,188 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:49:47,886 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4280#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (<= 100 main_~i~1) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 99 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:49:47,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:49:47,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:49:47,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-03-31 20:49:47,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911174147] [2023-03-31 20:49:47,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:49:47,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-03-31 20:49:47,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:47,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-03-31 20:49:47,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5128, Invalid=8436, Unknown=8, NotChecked=0, Total=13572 [2023-03-31 20:49:47,891 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:49:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:47,998 INFO L93 Difference]: Finished difference Result 154 states and 211 transitions. [2023-03-31 20:49:47,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-03-31 20:49:47,999 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 104 [2023-03-31 20:49:48,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:48,001 INFO L225 Difference]: With dead ends: 154 [2023-03-31 20:49:48,001 INFO L226 Difference]: Without dead ends: 129 [2023-03-31 20:49:48,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2582 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5128, Invalid=8436, Unknown=8, NotChecked=0, Total=13572 [2023-03-31 20:49:48,007 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:49:48,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:49:48,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-03-31 20:49:48,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-03-31 20:49:48,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 121 states have (on average 1.024793388429752) internal successors, (124), 121 states have internal predecessors, (124), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:49:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2023-03-31 20:49:48,026 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 104 [2023-03-31 20:49:48,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:48,026 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2023-03-31 20:49:48,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:49:48,026 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2023-03-31 20:49:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-03-31 20:49:48,027 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:48,027 INFO L195 NwaCegarLoop]: trace histogram [98, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:49:48,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 20:49:48,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 20:49:48,236 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:48,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:48,237 INFO L85 PathProgramCache]: Analyzing trace with hash -525538636, now seen corresponding path program 8 times [2023-03-31 20:49:48,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:48,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996669428] [2023-03-31 20:49:48,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:48,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-03-31 20:49:52,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:52,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996669428] [2023-03-31 20:49:52,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996669428] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:52,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537679374] [2023-03-31 20:49:52,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:49:52,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:52,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:52,891 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:49:52,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 20:49:53,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 20:49:53,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:49:53,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:49:53,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:49:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 5139 trivial. 0 not checked. [2023-03-31 20:49:53,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:49:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5385 trivial. 0 not checked. [2023-03-31 20:49:53,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537679374] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:49:53,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [876488670] [2023-03-31 20:49:53,289 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:49:53,289 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:49:53,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:49:53,290 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:49:53,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:49:53,306 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:49:53,562 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:49:53,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:49:53,589 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:49:54,666 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5867#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (<= 100 main_~i~1) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 99 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:49:54,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:49:54,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:49:54,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2023-03-31 20:49:54,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400627404] [2023-03-31 20:49:54,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:49:54,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-03-31 20:49:54,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:49:54,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-03-31 20:49:54,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5155, Invalid=9843, Unknown=8, NotChecked=0, Total=15006 [2023-03-31 20:49:54,670 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand has 107 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:49:54,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:49:54,812 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2023-03-31 20:49:54,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-03-31 20:49:54,817 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 154 [2023-03-31 20:49:54,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:49:54,817 INFO L225 Difference]: With dead ends: 159 [2023-03-31 20:49:54,818 INFO L226 Difference]: Without dead ends: 134 [2023-03-31 20:49:54,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2306 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5155, Invalid=9843, Unknown=8, NotChecked=0, Total=15006 [2023-03-31 20:49:54,819 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:49:54,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 121 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:49:54,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-03-31 20:49:54,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-03-31 20:49:54,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:49:54,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2023-03-31 20:49:54,828 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 154 [2023-03-31 20:49:54,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:49:54,829 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2023-03-31 20:49:54,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:49:54,829 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2023-03-31 20:49:54,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-03-31 20:49:54,830 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:49:54,830 INFO L195 NwaCegarLoop]: trace histogram [99, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:49:54,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-31 20:49:55,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-31 20:49:55,038 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:49:55,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:49:55,038 INFO L85 PathProgramCache]: Analyzing trace with hash 370755352, now seen corresponding path program 9 times [2023-03-31 20:49:55,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:49:55,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739860990] [2023-03-31 20:49:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:49:55,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:49:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:49:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2023-03-31 20:49:59,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:49:59,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739860990] [2023-03-31 20:49:59,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739860990] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:49:59,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673218620] [2023-03-31 20:49:59,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:49:59,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:49:59,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:49:59,708 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:49:59,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 20:49:59,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:49:59,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:49:59,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 101 conjunts are in the unsatisfiable core [2023-03-31 20:49:59,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:50:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2023-03-31 20:50:00,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:50:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2023-03-31 20:50:03,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673218620] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:50:03,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [642307659] [2023-03-31 20:50:03,251 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:50:03,251 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:50:03,251 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:50:03,251 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:50:03,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:50:03,271 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:50:03,538 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:50:03,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:50:03,565 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:50:04,572 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7500#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (<= 100 main_~i~1) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 99 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:50:04,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:50:04,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:50:04,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 103 [2023-03-31 20:50:04,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892043633] [2023-03-31 20:50:04,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:50:04,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2023-03-31 20:50:04,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:50:04,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2023-03-31 20:50:04,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5331, Invalid=8703, Unknown=8, NotChecked=0, Total=14042 [2023-03-31 20:50:04,576 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 103 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:50:04,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:50:04,694 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2023-03-31 20:50:04,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-03-31 20:50:04,695 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 159 [2023-03-31 20:50:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:50:04,697 INFO L225 Difference]: With dead ends: 164 [2023-03-31 20:50:04,697 INFO L226 Difference]: Without dead ends: 135 [2023-03-31 20:50:04,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 361 SyntacticMatches, 100 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7094 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=5331, Invalid=8703, Unknown=8, NotChecked=0, Total=14042 [2023-03-31 20:50:04,699 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:50:04,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:50:04,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-03-31 20:50:04,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-03-31 20:50:04,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:50:04,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2023-03-31 20:50:04,704 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 159 [2023-03-31 20:50:04,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:50:04,704 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2023-03-31 20:50:04,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:50:04,704 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2023-03-31 20:50:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-03-31 20:50:04,706 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:50:04,706 INFO L195 NwaCegarLoop]: trace histogram [100, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:50:04,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-03-31 20:50:04,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-31 20:50:04,913 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:50:04,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:50:04,913 INFO L85 PathProgramCache]: Analyzing trace with hash -902104332, now seen corresponding path program 10 times [2023-03-31 20:50:04,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:50:04,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488470310] [2023-03-31 20:50:04,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:50:04,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:50:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:50:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5605 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 5584 trivial. 0 not checked. [2023-03-31 20:50:05,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:50:05,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488470310] [2023-03-31 20:50:05,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488470310] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:50:05,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535326528] [2023-03-31 20:50:05,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:50:05,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:50:05,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:50:05,186 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:50:05,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-31 20:50:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:50:05,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 1233 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 20:50:05,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:50:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5605 backedges. 244 proven. 55 refuted. 0 times theorem prover too weak. 5306 trivial. 0 not checked. [2023-03-31 20:50:05,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:50:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5605 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 5306 trivial. 0 not checked. [2023-03-31 20:50:05,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535326528] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:50:05,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1612095340] [2023-03-31 20:50:05,772 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:50:05,772 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:50:05,772 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:50:05,772 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:50:05,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:50:05,781 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:50:06,028 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:50:06,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:50:06,055 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:50:06,532 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9079#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (<= 100 main_~i~1) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 99 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:50:06,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:50:06,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:50:06,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 31 [2023-03-31 20:50:06,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45253796] [2023-03-31 20:50:06,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:50:06,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-03-31 20:50:06,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:50:06,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-03-31 20:50:06,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1765, Unknown=8, NotChecked=0, Total=2162 [2023-03-31 20:50:06,534 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 20:50:06,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:50:06,573 INFO L93 Difference]: Finished difference Result 176 states and 198 transitions. [2023-03-31 20:50:06,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-03-31 20:50:06,574 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 160 [2023-03-31 20:50:06,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:50:06,575 INFO L225 Difference]: With dead ends: 176 [2023-03-31 20:50:06,575 INFO L226 Difference]: Without dead ends: 148 [2023-03-31 20:50:06,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=389, Invalid=1765, Unknown=8, NotChecked=0, Total=2162 [2023-03-31 20:50:06,576 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:50:06,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:50:06,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-03-31 20:50:06,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2023-03-31 20:50:06,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:50:06,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2023-03-31 20:50:06,580 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 160 [2023-03-31 20:50:06,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:50:06,581 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2023-03-31 20:50:06,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 20:50:06,581 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2023-03-31 20:50:06,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-03-31 20:50:06,582 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:50:06,582 INFO L195 NwaCegarLoop]: trace histogram [100, 66, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:50:06,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-03-31 20:50:06,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-03-31 20:50:06,789 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:50:06,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:50:06,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1929294973, now seen corresponding path program 11 times [2023-03-31 20:50:06,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:50:06,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051982316] [2023-03-31 20:50:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:50:06,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:50:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:50:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7430 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7402 trivial. 0 not checked. [2023-03-31 20:50:07,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:50:07,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051982316] [2023-03-31 20:50:07,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051982316] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:50:07,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062845241] [2023-03-31 20:50:07,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:50:07,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:50:07,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:50:07,094 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:50:07,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-03-31 20:50:07,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-03-31 20:50:07,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:50:07,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 20:50:07,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:50:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7430 backedges. 1062 proven. 28 refuted. 0 times theorem prover too weak. 6340 trivial. 0 not checked. [2023-03-31 20:50:07,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:50:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7430 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7402 trivial. 0 not checked. [2023-03-31 20:50:07,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062845241] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:50:07,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [309583579] [2023-03-31 20:50:07,624 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:50:07,624 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:50:07,624 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:50:07,625 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:50:07,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:50:07,633 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:50:07,882 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:50:07,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:50:07,909 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:50:08,322 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10918#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (<= 100 main_~i~1) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 99 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:50:08,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:50:08,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:50:08,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2023-03-31 20:50:08,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914570966] [2023-03-31 20:50:08,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:50:08,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-03-31 20:50:08,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:50:08,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-03-31 20:50:08,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=933, Unknown=8, NotChecked=0, Total=1190 [2023-03-31 20:50:08,324 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 20:50:08,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:50:08,365 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2023-03-31 20:50:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-03-31 20:50:08,365 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 197 [2023-03-31 20:50:08,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:50:08,366 INFO L225 Difference]: With dead ends: 187 [2023-03-31 20:50:08,366 INFO L226 Difference]: Without dead ends: 157 [2023-03-31 20:50:08,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=933, Unknown=8, NotChecked=0, Total=1190 [2023-03-31 20:50:08,367 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:50:08,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:50:08,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-03-31 20:50:08,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-03-31 20:50:08,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:50:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2023-03-31 20:50:08,372 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 197 [2023-03-31 20:50:08,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:50:08,372 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2023-03-31 20:50:08,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 20:50:08,372 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2023-03-31 20:50:08,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-03-31 20:50:08,373 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:50:08,373 INFO L195 NwaCegarLoop]: trace histogram [100, 66, 16, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:50:08,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-03-31 20:50:08,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-03-31 20:50:08,580 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:50:08,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:50:08,580 INFO L85 PathProgramCache]: Analyzing trace with hash -533405164, now seen corresponding path program 12 times [2023-03-31 20:50:08,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:50:08,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119338662] [2023-03-31 20:50:08,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:50:08,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:50:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:50:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7538 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 7402 trivial. 0 not checked. [2023-03-31 20:50:09,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:50:09,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119338662] [2023-03-31 20:50:09,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119338662] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:50:09,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124005830] [2023-03-31 20:50:09,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:50:09,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:50:09,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:50:09,124 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:50:09,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-03-31 20:50:09,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:50:09,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:50:09,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 1483 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-31 20:50:09,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:50:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7538 backedges. 1060 proven. 253 refuted. 0 times theorem prover too weak. 6225 trivial. 0 not checked. [2023-03-31 20:50:09,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:50:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7538 backedges. 0 proven. 1313 refuted. 0 times theorem prover too weak. 6225 trivial. 0 not checked. [2023-03-31 20:50:10,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124005830] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:50:10,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [963880053] [2023-03-31 20:50:10,473 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:50:10,473 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:50:10,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:50:10,473 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:50:10,473 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:50:10,490 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:50:10,727 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:50:10,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:50:10,768 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:50:11,412 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12899#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (<= 100 main_~i~1) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 99 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:50:11,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:50:11,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:50:11,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25, 25] total 65 [2023-03-31 20:50:11,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821605477] [2023-03-31 20:50:11,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:50:11,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-03-31 20:50:11,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:50:11,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-03-31 20:50:11,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=5096, Unknown=8, NotChecked=0, Total=6480 [2023-03-31 20:50:11,414 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand has 65 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 65 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 20:50:11,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:50:11,482 INFO L93 Difference]: Finished difference Result 232 states and 266 transitions. [2023-03-31 20:50:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-03-31 20:50:11,483 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 65 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 206 [2023-03-31 20:50:11,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:50:11,484 INFO L225 Difference]: With dead ends: 232 [2023-03-31 20:50:11,484 INFO L226 Difference]: Without dead ends: 182 [2023-03-31 20:50:11,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2102 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1376, Invalid=5096, Unknown=8, NotChecked=0, Total=6480 [2023-03-31 20:50:11,485 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:50:11,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:50:11,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-03-31 20:50:11,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2023-03-31 20:50:11,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 174 states have (on average 1.0172413793103448) internal successors, (177), 174 states have internal predecessors, (177), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:50:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2023-03-31 20:50:11,491 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 206 [2023-03-31 20:50:11,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:50:11,491 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2023-03-31 20:50:11,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 65 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 20:50:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2023-03-31 20:50:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2023-03-31 20:50:11,492 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:50:11,492 INFO L195 NwaCegarLoop]: trace histogram [138, 100, 17, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:50:11,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-03-31 20:50:11,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:50:11,700 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:50:11,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:50:11,700 INFO L85 PathProgramCache]: Analyzing trace with hash -40423261, now seen corresponding path program 13 times [2023-03-31 20:50:11,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:50:11,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581010920] [2023-03-31 20:50:11,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:50:11,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:50:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:50:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15079 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 14926 trivial. 0 not checked. [2023-03-31 20:50:12,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:50:12,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581010920] [2023-03-31 20:50:12,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581010920] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:50:12,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858024991] [2023-03-31 20:50:12,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:50:12,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:50:12,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:50:12,416 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:50:12,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-03-31 20:50:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:50:12,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 1850 conjuncts, 48 conjunts are in the unsatisfiable core [2023-03-31 20:50:12,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:50:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 15079 backedges. 4420 proven. 1081 refuted. 0 times theorem prover too weak. 9578 trivial. 0 not checked. [2023-03-31 20:50:13,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:50:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 15079 backedges. 0 proven. 5501 refuted. 0 times theorem prover too weak. 9578 trivial. 0 not checked. [2023-03-31 20:50:16,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858024991] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:50:16,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1701488307] [2023-03-31 20:50:16,100 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:50:16,101 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:50:16,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:50:16,101 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:50:16,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:50:16,116 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:50:16,353 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:50:16,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:50:16,380 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:50:17,182 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15505#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (<= 100 main_~i~1) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 99 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:50:17,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:50:17,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:50:17,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 49, 49] total 114 [2023-03-31 20:50:17,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125274477] [2023-03-31 20:50:17,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:50:17,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2023-03-31 20:50:17,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:50:17,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2023-03-31 20:50:17,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4827, Invalid=11935, Unknown=8, NotChecked=0, Total=16770 [2023-03-31 20:50:17,186 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand has 114 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 114 states have internal predecessors, (133), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 20:50:17,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:50:17,301 INFO L93 Difference]: Finished difference Result 306 states and 364 transitions. [2023-03-31 20:50:17,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2023-03-31 20:50:17,301 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 114 states have internal predecessors, (133), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 279 [2023-03-31 20:50:17,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:50:17,302 INFO L225 Difference]: With dead ends: 306 [2023-03-31 20:50:17,302 INFO L226 Difference]: Without dead ends: 231 [2023-03-31 20:50:17,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 728 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4132 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4827, Invalid=11935, Unknown=8, NotChecked=0, Total=16770 [2023-03-31 20:50:17,304 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:50:17,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:50:17,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-03-31 20:50:17,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2023-03-31 20:50:17,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 223 states have (on average 1.0134529147982063) internal successors, (226), 223 states have internal predecessors, (226), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:50:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 235 transitions. [2023-03-31 20:50:17,311 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 235 transitions. Word has length 279 [2023-03-31 20:50:17,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:50:17,311 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 235 transitions. [2023-03-31 20:50:17,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 114 states have internal predecessors, (133), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 20:50:17,311 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 235 transitions. [2023-03-31 20:50:17,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2023-03-31 20:50:17,313 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:50:17,313 INFO L195 NwaCegarLoop]: trace histogram [282, 100, 18, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:50:17,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-03-31 20:50:17,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-03-31 20:50:17,521 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:50:17,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:50:17,521 INFO L85 PathProgramCache]: Analyzing trace with hash 2018100852, now seen corresponding path program 14 times [2023-03-31 20:50:17,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:50:17,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058097925] [2023-03-31 20:50:17,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:50:17,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:50:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:50:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 45697 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 45526 trivial. 0 not checked. [2023-03-31 20:50:18,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:50:18,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058097925] [2023-03-31 20:50:18,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058097925] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:50:18,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103793346] [2023-03-31 20:50:18,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:50:18,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:50:18,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:50:18,449 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:50:18,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-03-31 20:50:21,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-03-31 20:50:21,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:50:21,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 29 conjunts are in the unsatisfiable core [2023-03-31 20:50:21,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:50:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 45697 backedges. 18054 proven. 171 refuted. 0 times theorem prover too weak. 27472 trivial. 0 not checked. [2023-03-31 20:50:21,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:50:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 45697 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 45526 trivial. 0 not checked. [2023-03-31 20:50:22,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103793346] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:50:22,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [98619336] [2023-03-31 20:50:22,005 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:50:22,005 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:50:22,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:50:22,006 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:50:22,006 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:50:22,046 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:50:22,283 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 12 for LOIs [2023-03-31 20:50:22,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:50:22,342 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:50:22,829 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19154#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (<= 100 main_~i~1) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 99 main_~i~2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:50:22,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:50:22,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:50:22,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2023-03-31 20:50:22,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233438781] [2023-03-31 20:50:22,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:50:22,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-03-31 20:50:22,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:50:22,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-03-31 20:50:22,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=898, Invalid=2286, Unknown=8, NotChecked=0, Total=3192 [2023-03-31 20:50:22,831 INFO L87 Difference]: Start difference. First operand 231 states and 235 transitions. Second operand has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 20:50:22,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:50:22,877 INFO L93 Difference]: Finished difference Result 353 states and 377 transitions. [2023-03-31 20:50:22,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-03-31 20:50:22,877 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 424 [2023-03-31 20:50:22,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:50:22,878 INFO L225 Difference]: With dead ends: 353 [2023-03-31 20:50:22,878 INFO L226 Difference]: Without dead ends: 251 [2023-03-31 20:50:22,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1292 GetRequests, 1237 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=898, Invalid=2286, Unknown=8, NotChecked=0, Total=3192 [2023-03-31 20:50:22,879 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:50:22,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:50:22,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-03-31 20:50:22,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2023-03-31 20:50:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 243 states have (on average 1.0123456790123457) internal successors, (246), 243 states have internal predecessors, (246), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:50:22,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 255 transitions. [2023-03-31 20:50:22,887 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 255 transitions. Word has length 424 [2023-03-31 20:50:22,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:50:22,887 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 255 transitions. [2023-03-31 20:50:22,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 20:50:22,888 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 255 transitions. [2023-03-31 20:50:22,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2023-03-31 20:50:22,889 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:50:22,890 INFO L195 NwaCegarLoop]: trace histogram [282, 100, 38, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:50:22,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-03-31 20:50:23,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-03-31 20:50:23,097 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:50:23,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:50:23,097 INFO L85 PathProgramCache]: Analyzing trace with hash 649318708, now seen corresponding path program 15 times [2023-03-31 20:50:23,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:50:23,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194797652] [2023-03-31 20:50:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:50:23,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:50:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:50:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 46267 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 45526 trivial. 0 not checked. [2023-03-31 20:50:25,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:50:25,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194797652] [2023-03-31 20:50:25,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194797652] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:50:25,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554064359] [2023-03-31 20:50:25,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:50:25,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:50:25,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:50:25,076 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:50:25,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-03-31 20:50:25,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:50:25,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:50:25,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 2717 conjuncts, 96 conjunts are in the unsatisfiable core [2023-03-31 20:50:25,713 INFO L285 TraceCheckSpWp]: Computing forward predicates...