/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/reducercommutativity/max05-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:45:04,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:45:04,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:45:04,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:45:04,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:45:04,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:45:04,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:45:04,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:45:04,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:45:04,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:45:04,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:45:04,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 02:45:04,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 02:45:04,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 02:45:04,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 02:45:04,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 02:45:04,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 02:45:04,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 02:45:04,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 02:45:04,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 02:45:04,802 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 02:45:04,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 02:45:04,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 02:45:04,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 02:45:04,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 02:45:04,810 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 02:45:04,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 02:45:04,811 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 02:45:04,811 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 02:45:04,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 02:45:04,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:45:04,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:45:04,813 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:45:04,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:45:04,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:45:04,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:45:04,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:45:04,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:45:04,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:45:04,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:45:04,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:45:04,816 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 02:45:04,843 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:45:04,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:45:04,843 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:45:04,843 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:45:04,844 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:45:04,844 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:45:04,844 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:45:04,844 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:45:04,844 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:45:04,844 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:45:04,845 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:45:04,845 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:45:04,845 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:45:04,845 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:45:04,845 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:45:04,845 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:45:04,846 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:45:04,846 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:45:04,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:45:04,846 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:45:04,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:45:04,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:45:04,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:45:04,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:45:04,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:45:04,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:45:04,847 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:45:04,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:45:04,847 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:45:04,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:45:04,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:45:04,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:45:04,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:45:04,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:45:04,848 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:45:04,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:45:04,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:45:04,848 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:45:04,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:45:04,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:45:04,848 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:45:04,848 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:45:05,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:45:05,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:45:05,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:45:05,068 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:45:05,068 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:45:05,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/max05-1.i [2023-04-01 02:45:06,018 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:45:06,190 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:45:06,190 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max05-1.i [2023-04-01 02:45:06,194 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2601ea31/f2dc9e36d5f14cb99f55b4bcac8dc3a2/FLAG5becd381c [2023-04-01 02:45:06,204 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2601ea31/f2dc9e36d5f14cb99f55b4bcac8dc3a2 [2023-04-01 02:45:06,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:45:06,206 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:45:06,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:45:06,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:45:06,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:45:06,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:45:06" (1/1) ... [2023-04-01 02:45:06,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63323fba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:06, skipping insertion in model container [2023-04-01 02:45:06,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:45:06" (1/1) ... [2023-04-01 02:45:06,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:45:06,225 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:45:06,353 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/reducercommutativity/max05-1.i[1284,1297] [2023-04-01 02:45:06,362 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:45:06,368 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:45:06,388 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/reducercommutativity/max05-1.i[1284,1297] [2023-04-01 02:45:06,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:45:06,398 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:45:06,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:06 WrapperNode [2023-04-01 02:45:06,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:45:06,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:45:06,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:45:06,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:45:06,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:06" (1/1) ... [2023-04-01 02:45:06,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:06" (1/1) ... [2023-04-01 02:45:06,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:06" (1/1) ... [2023-04-01 02:45:06,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:06" (1/1) ... [2023-04-01 02:45:06,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:06" (1/1) ... [2023-04-01 02:45:06,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:06" (1/1) ... [2023-04-01 02:45:06,434 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:06" (1/1) ... [2023-04-01 02:45:06,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:06" (1/1) ... [2023-04-01 02:45:06,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:45:06,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:45:06,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:45:06,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:45:06,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:06" (1/1) ... [2023-04-01 02:45:06,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:45:06,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:45:06,466 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 02:45:06,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 02:45:06,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:45:06,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:45:06,506 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:45:06,506 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2023-04-01 02:45:06,509 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:45:06,509 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:45:06,510 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:45:06,510 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 02:45:06,510 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 02:45:06,510 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:45:06,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:45:06,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:45:06,510 INFO L130 BoogieDeclarations]: Found specification of procedure max [2023-04-01 02:45:06,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:45:06,510 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:45:06,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 02:45:06,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:45:06,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:45:06,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:45:06,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:45:06,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:45:06,560 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:45:06,562 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:45:06,678 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:45:06,713 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:45:06,713 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 02:45:06,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:45:06 BoogieIcfgContainer [2023-04-01 02:45:06,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:45:06,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:45:06,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:45:06,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:45:06,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:45:06" (1/3) ... [2023-04-01 02:45:06,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2180d169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:45:06, skipping insertion in model container [2023-04-01 02:45:06,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:06" (2/3) ... [2023-04-01 02:45:06,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2180d169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:45:06, skipping insertion in model container [2023-04-01 02:45:06,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:45:06" (3/3) ... [2023-04-01 02:45:06,720 INFO L112 eAbstractionObserver]: Analyzing ICFG max05-1.i [2023-04-01 02:45:06,732 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:45:06,732 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:45:06,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:45:06,767 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;@4b1e46bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:45:06,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:45:06,770 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) [2023-04-01 02:45:06,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 02:45:06,775 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:45:06,775 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] [2023-04-01 02:45:06,775 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:45:06,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:45:06,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1781608090, now seen corresponding path program 1 times [2023-04-01 02:45:06,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:45:06,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921308668] [2023-04-01 02:45:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:06,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:45:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:45:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 02:45:06,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:45:06,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921308668] [2023-04-01 02:45:06,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921308668] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:45:06,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:45:06,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 02:45:06,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746083332] [2023-04-01 02:45:06,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:45:06,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:45:06,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:45:07,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:45:07,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:45:07,021 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) [2023-04-01 02:45:07,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:45:07,077 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2023-04-01 02:45:07,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:45:07,079 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 [2023-04-01 02:45:07,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:45:07,084 INFO L225 Difference]: With dead ends: 41 [2023-04-01 02:45:07,084 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 02:45:07,087 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 [2023-04-01 02:45:07,090 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 [2023-04-01 02:45:07,091 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] [2023-04-01 02:45:07,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 02:45:07,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-01 02:45:07,118 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) [2023-04-01 02:45:07,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-04-01 02:45:07,121 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2023-04-01 02:45:07,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:45:07,122 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-04-01 02:45:07,122 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) [2023-04-01 02:45:07,122 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-04-01 02:45:07,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 02:45:07,124 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:45:07,124 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] [2023-04-01 02:45:07,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:45:07,125 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:45:07,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:45:07,128 INFO L85 PathProgramCache]: Analyzing trace with hash -676492365, now seen corresponding path program 1 times [2023-04-01 02:45:07,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:45:07,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946833330] [2023-04-01 02:45:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:07,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:45:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:45:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 02:45:07,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:45:07,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946833330] [2023-04-01 02:45:07,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946833330] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:45:07,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119359332] [2023-04-01 02:45:07,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:07,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:07,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:45:07,274 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:45:07,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 02:45:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:45:07,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 02:45:07,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:45:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 02:45:07,401 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:45:07,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119359332] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:45:07,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 02:45:07,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 02:45:07,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365206083] [2023-04-01 02:45:07,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:45:07,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:45:07,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:45:07,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:45:07,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:45:07,410 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) [2023-04-01 02:45:07,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:45:07,434 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-04-01 02:45:07,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:45:07,434 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 [2023-04-01 02:45:07,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:45:07,436 INFO L225 Difference]: With dead ends: 33 [2023-04-01 02:45:07,436 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 02:45:07,436 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 [2023-04-01 02:45:07,438 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 [2023-04-01 02:45:07,439 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] [2023-04-01 02:45:07,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 02:45:07,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 02:45:07,448 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) [2023-04-01 02:45:07,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-04-01 02:45:07,450 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2023-04-01 02:45:07,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:45:07,450 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-04-01 02:45:07,451 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) [2023-04-01 02:45:07,451 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-04-01 02:45:07,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 02:45:07,451 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:45:07,451 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] [2023-04-01 02:45:07,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 02:45:07,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:07,656 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:45:07,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:45:07,657 INFO L85 PathProgramCache]: Analyzing trace with hash 167715681, now seen corresponding path program 1 times [2023-04-01 02:45:07,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:45:07,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034396452] [2023-04-01 02:45:07,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:07,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:45:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:45:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:45:07,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:45:07,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034396452] [2023-04-01 02:45:07,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034396452] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:45:07,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757530311] [2023-04-01 02:45:07,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:07,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:07,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:45:07,742 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:45:07,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 02:45:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:45:07,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 02:45:07,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:45:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:45:07,807 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:45:07,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757530311] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:45:07,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 02:45:07,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 02:45:07,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645043918] [2023-04-01 02:45:07,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:45:07,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:45:07,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:45:07,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:45:07,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:45:07,809 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) [2023-04-01 02:45:07,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:45:07,820 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-04-01 02:45:07,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:45:07,820 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 [2023-04-01 02:45:07,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:45:07,821 INFO L225 Difference]: With dead ends: 31 [2023-04-01 02:45:07,821 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 02:45:07,821 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 [2023-04-01 02:45:07,822 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 [2023-04-01 02:45:07,822 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] [2023-04-01 02:45:07,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 02:45:07,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 02:45:07,824 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) [2023-04-01 02:45:07,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-04-01 02:45:07,825 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2023-04-01 02:45:07,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:45:07,826 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-04-01 02:45:07,826 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) [2023-04-01 02:45:07,826 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-04-01 02:45:07,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 02:45:07,826 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:45:07,827 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] [2023-04-01 02:45:07,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 02:45:08,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 02:45:08,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:45:08,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:45:08,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1475217521, now seen corresponding path program 1 times [2023-04-01 02:45:08,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:45:08,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308052572] [2023-04-01 02:45:08,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:08,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:45:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:45:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 02:45:08,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:45:08,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308052572] [2023-04-01 02:45:08,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308052572] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:45:08,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412555250] [2023-04-01 02:45:08,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:08,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:08,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:45:08,106 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:45:08,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 02:45:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:45:08,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:45:08,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:45:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 02:45:08,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:45:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 02:45:08,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412555250] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:45:08,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [316027956] [2023-04-01 02:45:08,262 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:45:08,262 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:45:08,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:45:08,267 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:45:08,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:45:08,330 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:45:08,928 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 19 for LOIs [2023-04-01 02:45:09,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:45:09,013 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:45:10,048 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '631#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 4 main_~i~2) (<= 0 (+ main_~ret5~0 2147483648)) (<= 5 main_~i~1) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:45:10,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:45:10,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:45:10,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:45:10,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010570406] [2023-04-01 02:45:10,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:45:10,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:45:10,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:45:10,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:45:10,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-04-01 02:45:10,053 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) [2023-04-01 02:45:10,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:45:10,086 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-04-01 02:45:10,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:45:10,087 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 [2023-04-01 02:45:10,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:45:10,088 INFO L225 Difference]: With dead ends: 40 [2023-04-01 02:45:10,088 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 02:45:10,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-04-01 02:45:10,091 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 [2023-04-01 02:45:10,092 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] [2023-04-01 02:45:10,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 02:45:10,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 02:45:10,095 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) [2023-04-01 02:45:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-01 02:45:10,095 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2023-04-01 02:45:10,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:45:10,095 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-01 02:45:10,095 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) [2023-04-01 02:45:10,095 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-01 02:45:10,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 02:45:10,096 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:45:10,096 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] [2023-04-01 02:45:10,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 02:45:10,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:10,307 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:45:10,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:45:10,307 INFO L85 PathProgramCache]: Analyzing trace with hash -285587484, now seen corresponding path program 2 times [2023-04-01 02:45:10,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:45:10,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431982186] [2023-04-01 02:45:10,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:10,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:45:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:45:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:45:10,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:45:10,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431982186] [2023-04-01 02:45:10,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431982186] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:45:10,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444107285] [2023-04-01 02:45:10,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:45:10,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:10,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:45:10,357 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:45:10,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 02:45:10,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:45:10,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:45:10,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:45:10,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:45:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:45:10,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:45:10,457 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:45:10,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444107285] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:45:10,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2120423356] [2023-04-01 02:45:10,460 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:45:10,460 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:45:10,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:45:10,461 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:45:10,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:45:10,481 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:45:10,801 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 19 for LOIs [2023-04-01 02:45:10,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:45:10,850 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:45:11,747 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '950#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 4 main_~i~2) (<= 0 (+ main_~ret5~0 2147483648)) (<= 5 main_~i~1) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:45:11,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:45:11,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:45:11,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:45:11,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210161164] [2023-04-01 02:45:11,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:45:11,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:45:11,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:45:11,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:45:11,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-04-01 02:45:11,749 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) [2023-04-01 02:45:11,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:45:11,773 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-04-01 02:45:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:45:11,773 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 [2023-04-01 02:45:11,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:45:11,774 INFO L225 Difference]: With dead ends: 42 [2023-04-01 02:45:11,774 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 02:45:11,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-04-01 02:45:11,775 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 [2023-04-01 02:45:11,775 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] [2023-04-01 02:45:11,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 02:45:11,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 02:45:11,777 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) [2023-04-01 02:45:11,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-04-01 02:45:11,778 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 32 [2023-04-01 02:45:11,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:45:11,778 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-04-01 02:45:11,778 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) [2023-04-01 02:45:11,778 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-04-01 02:45:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 02:45:11,779 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:45:11,779 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] [2023-04-01 02:45:11,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 02:45:11,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:11,984 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:45:11,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:45:11,985 INFO L85 PathProgramCache]: Analyzing trace with hash 530504940, now seen corresponding path program 3 times [2023-04-01 02:45:11,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:45:11,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289810948] [2023-04-01 02:45:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:11,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:45:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:45:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-04-01 02:45:12,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:45:12,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289810948] [2023-04-01 02:45:12,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289810948] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:45:12,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826250761] [2023-04-01 02:45:12,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:45:12,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:12,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:45:12,053 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:45:12,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 02:45:12,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:45:12,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:45:12,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 02:45:12,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:45:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 02:45:12,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:45:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 02:45:12,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826250761] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:45:12,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [14458585] [2023-04-01 02:45:12,194 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:45:12,194 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:45:12,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:45:12,195 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:45:12,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:45:12,214 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:45:12,486 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 19 for LOIs [2023-04-01 02:45:12,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:45:12,531 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:45:13,433 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1335#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 4 main_~i~2) (<= 0 (+ main_~ret5~0 2147483648)) (<= 5 main_~i~1) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:45:13,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:45:13,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:45:13,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 9 [2023-04-01 02:45:13,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909286279] [2023-04-01 02:45:13,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:45:13,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 02:45:13,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:45:13,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 02:45:13,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=488, Unknown=8, NotChecked=0, Total=600 [2023-04-01 02:45:13,435 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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) [2023-04-01 02:45:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:45:13,461 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2023-04-01 02:45:13,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 02:45:13,462 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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 41 [2023-04-01 02:45:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:45:13,463 INFO L225 Difference]: With dead ends: 47 [2023-04-01 02:45:13,463 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 02:45:13,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=104, Invalid=488, Unknown=8, NotChecked=0, Total=600 [2023-04-01 02:45:13,463 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:45:13,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:45:13,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 02:45:13,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-01 02:45:13,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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) [2023-04-01 02:45:13,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-04-01 02:45:13,466 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 41 [2023-04-01 02:45:13,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:45:13,467 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-04-01 02:45:13,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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) [2023-04-01 02:45:13,467 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-04-01 02:45:13,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 02:45:13,467 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:45:13,467 INFO L195 NwaCegarLoop]: trace histogram [15, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:45:13,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 02:45:13,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:13,675 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:45:13,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:45:13,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1950863950, now seen corresponding path program 4 times [2023-04-01 02:45:13,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:45:13,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033223344] [2023-04-01 02:45:13,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:13,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:45:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:45:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-04-01 02:45:13,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:45:13,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033223344] [2023-04-01 02:45:13,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033223344] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:45:13,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598988731] [2023-04-01 02:45:13,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:45:13,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:13,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:45:13,766 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:45:13,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 02:45:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:45:13,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 02:45:13,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:45:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-04-01 02:45:13,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:45:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-04-01 02:45:13,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598988731] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:45:13,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [906092164] [2023-04-01 02:45:13,897 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:45:13,897 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:45:13,897 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:45:13,898 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:45:13,898 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:45:13,909 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:45:14,197 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 19 for LOIs [2023-04-01 02:45:14,241 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:45:14,243 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:45:15,084 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1757#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 4 main_~i~2) (<= 0 (+ main_~ret5~0 2147483648)) (<= 5 main_~i~1) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:45:15,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:45:15,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:45:15,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2023-04-01 02:45:15,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024761105] [2023-04-01 02:45:15,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:45:15,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 02:45:15,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:45:15,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 02:45:15,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=438, Unknown=8, NotChecked=0, Total=552 [2023-04-01 02:45:15,086 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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) [2023-04-01 02:45:15,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:45:15,115 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2023-04-01 02:45:15,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 02:45:15,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 45 [2023-04-01 02:45:15,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:45:15,115 INFO L225 Difference]: With dead ends: 51 [2023-04-01 02:45:15,116 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 02:45:15,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=106, Invalid=438, Unknown=8, NotChecked=0, Total=552 [2023-04-01 02:45:15,116 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:45:15,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:45:15,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 02:45:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 02:45:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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) [2023-04-01 02:45:15,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-04-01 02:45:15,119 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 45 [2023-04-01 02:45:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:45:15,119 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-04-01 02:45:15,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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) [2023-04-01 02:45:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-04-01 02:45:15,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 02:45:15,120 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:45:15,120 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:45:15,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 02:45:15,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:15,330 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:45:15,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:45:15,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1224374817, now seen corresponding path program 5 times [2023-04-01 02:45:15,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:45:15,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826115672] [2023-04-01 02:45:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:15,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:45:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:45:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-04-01 02:45:15,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:45:15,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826115672] [2023-04-01 02:45:15,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826115672] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:45:15,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630344056] [2023-04-01 02:45:15,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:45:15,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:15,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:45:15,405 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:45:15,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 02:45:15,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 02:45:15,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:45:15,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:45:15,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:45:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-04-01 02:45:15,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:45:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-04-01 02:45:15,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630344056] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:45:15,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [689058380] [2023-04-01 02:45:15,508 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:45:15,508 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:45:15,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:45:15,508 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:45:15,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:45:15,518 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:45:15,778 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 19 for LOIs [2023-04-01 02:45:15,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:45:15,826 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:45:16,670 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2194#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 4 main_~i~2) (<= 0 (+ main_~ret5~0 2147483648)) (<= 5 main_~i~1) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:45:16,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:45:16,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:45:16,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-04-01 02:45:16,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359161742] [2023-04-01 02:45:16,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:45:16,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:45:16,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:45:16,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:45:16,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-04-01 02:45:16,674 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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) [2023-04-01 02:45:16,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:45:16,691 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2023-04-01 02:45:16,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:45:16,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 46 [2023-04-01 02:45:16,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:45:16,692 INFO L225 Difference]: With dead ends: 46 [2023-04-01 02:45:16,692 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 02:45:16,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-04-01 02:45:16,693 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:45:16,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:45:16,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 02:45:16,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-01 02:45:16,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 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) [2023-04-01 02:45:16,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-04-01 02:45:16,697 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 46 [2023-04-01 02:45:16,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:45:16,697 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-04-01 02:45:16,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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) [2023-04-01 02:45:16,697 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-04-01 02:45:16,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 02:45:16,698 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:45:16,698 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:45:16,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 02:45:16,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:16,905 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:45:16,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:45:16,905 INFO L85 PathProgramCache]: Analyzing trace with hash 419785761, now seen corresponding path program 6 times [2023-04-01 02:45:16,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:45:16,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349336439] [2023-04-01 02:45:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:16,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:45:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat