/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 EqDomain -i ../sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:09:41,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:09:41,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:09:41,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:09:41,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:09:41,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:09:42,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:09:42,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:09:42,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:09:42,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:09:42,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:09:42,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:09:42,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:09:42,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:09:42,015 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:09:42,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:09:42,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:09:42,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:09:42,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:09:42,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:09:42,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:09:42,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:09:42,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:09:42,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:09:42,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:09:42,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:09:42,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:09:42,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:09:42,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:09:42,032 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:09:42,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:09:42,033 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:09:42,034 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:09:42,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:09:42,035 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:09:42,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:09:42,036 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:09:42,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:09:42,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:09:42,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:09:42,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:09:42,038 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 11:09:42,067 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:09:42,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:09:42,068 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:09:42,068 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:09:42,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:09:42,069 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:09:42,069 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:09:42,069 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:09:42,069 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:09:42,069 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:09:42,069 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:09:42,070 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:09:42,070 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:09:42,070 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:09:42,070 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:09:42,070 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:09:42,070 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:09:42,070 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:09:42,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:09:42,071 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:09:42,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:09:42,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:09:42,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:09:42,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:09:42,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:09:42,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:09:42,072 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:09:42,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:09:42,072 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:09:42,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:09:42,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:09:42,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:09:42,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:09:42,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:09:42,073 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:09:42,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:09:42,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:09:42,073 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:09:42,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:09:42,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:09:42,073 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:09:42,073 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:09:42,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:09:42,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:09:42,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:09:42,303 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:09:42,303 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:09:42,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c [2023-04-01 11:09:43,235 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:09:43,382 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:09:43,382 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c [2023-04-01 11:09:43,389 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e6d9dc2c/51b70f43f5274629b56b70142c79e267/FLAG750321406 [2023-04-01 11:09:43,405 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e6d9dc2c/51b70f43f5274629b56b70142c79e267 [2023-04-01 11:09:43,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:09:43,407 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:09:43,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:09:43,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:09:43,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:09:43,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:09:43" (1/1) ... [2023-04-01 11:09:43,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@acf0ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:43, skipping insertion in model container [2023-04-01 11:09:43,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:09:43" (1/1) ... [2023-04-01 11:09:43,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:09:43,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:09:43,541 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c[318,331] [2023-04-01 11:09:43,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:09:43,563 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:09:43,572 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c[318,331] [2023-04-01 11:09:43,574 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:09:43,584 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:09:43,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:43 WrapperNode [2023-04-01 11:09:43,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:09:43,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:09:43,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:09:43,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:09:43,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:43" (1/1) ... [2023-04-01 11:09:43,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:43" (1/1) ... [2023-04-01 11:09:43,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:43" (1/1) ... [2023-04-01 11:09:43,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:43" (1/1) ... [2023-04-01 11:09:43,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:43" (1/1) ... [2023-04-01 11:09:43,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:43" (1/1) ... [2023-04-01 11:09:43,607 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:43" (1/1) ... [2023-04-01 11:09:43,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:43" (1/1) ... [2023-04-01 11:09:43,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:09:43,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:09:43,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:09:43,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:09:43,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:43" (1/1) ... [2023-04-01 11:09:43,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:09:43,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:09:43,646 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 11:09:43,657 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 11:09:43,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:09:43,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:09:43,678 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:09:43,678 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:09:43,678 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:09:43,678 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:09:43,678 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:09:43,678 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:09:43,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:09:43,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:09:43,679 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:09:43,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:09:43,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:09:43,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:09:43,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:09:43,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:09:43,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:09:43,729 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:09:43,731 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:09:43,816 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:09:43,841 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:09:43,841 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 11:09:43,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:09:43 BoogieIcfgContainer [2023-04-01 11:09:43,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:09:43,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:09:43,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:09:43,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:09:43,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:09:43" (1/3) ... [2023-04-01 11:09:43,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62362eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:09:43, skipping insertion in model container [2023-04-01 11:09:43,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:43" (2/3) ... [2023-04-01 11:09:43,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62362eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:09:43, skipping insertion in model container [2023-04-01 11:09:43,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:09:43" (3/3) ... [2023-04-01 11:09:43,849 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_8.c [2023-04-01 11:09:43,861 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:09:43,861 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:09:43,892 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:09:43,897 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;@5149881f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:09:43,897 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:09:43,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:09:43,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-01 11:09:43,905 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:09:43,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:09:43,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:09:43,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:09:43,910 INFO L85 PathProgramCache]: Analyzing trace with hash 307237867, now seen corresponding path program 1 times [2023-04-01 11:09:43,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:09:43,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823558962] [2023-04-01 11:09:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:09:43,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:09:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:09:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:44,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:09:44,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823558962] [2023-04-01 11:09:44,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823558962] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:09:44,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:09:44,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 11:09:44,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149410299] [2023-04-01 11:09:44,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:09:44,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 11:09:44,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:09:44,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 11:09:44,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:09:44,226 INFO L87 Difference]: Start difference. First operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:44,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:09:44,247 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-04-01 11:09:44,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 11:09:44,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-01 11:09:44,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:09:44,254 INFO L225 Difference]: With dead ends: 29 [2023-04-01 11:09:44,254 INFO L226 Difference]: Without dead ends: 12 [2023-04-01 11:09:44,279 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 11:09:44,282 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:09:44,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:09:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-04-01 11:09:44,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-04-01 11:09:44,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:44,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-04-01 11:09:44,339 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2023-04-01 11:09:44,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:09:44,339 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-04-01 11:09:44,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:44,340 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-04-01 11:09:44,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 11:09:44,340 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:09:44,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:09:44,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:09:44,341 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:09:44,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:09:44,341 INFO L85 PathProgramCache]: Analyzing trace with hash 913642257, now seen corresponding path program 1 times [2023-04-01 11:09:44,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:09:44,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129706207] [2023-04-01 11:09:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:09:44,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:09:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:09:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:44,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:09:44,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129706207] [2023-04-01 11:09:44,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129706207] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:09:44,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022519634] [2023-04-01 11:09:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:09:44,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:09:44,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:09:44,518 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 11:09:44,519 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 11:09:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:09:44,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:09:44,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:09:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:44,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:09:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:44,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022519634] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:09:44,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1950726910] [2023-04-01 11:09:44,661 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 11:09:44,661 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:09:44,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:09:44,667 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:09:44,667 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:09:44,783 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:09:45,083 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-01 11:09:45,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:09:45,102 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:09:45,311 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '152#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:09:45,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:09:45,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:09:45,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 11:09:45,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389805123] [2023-04-01 11:09:45,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:09:45,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:09:45,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:09:45,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:09:45,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-04-01 11:09:45,314 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:09:45,350 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2023-04-01 11:09:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:09:45,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 11:09:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:09:45,351 INFO L225 Difference]: With dead ends: 20 [2023-04-01 11:09:45,351 INFO L226 Difference]: Without dead ends: 15 [2023-04-01 11:09:45,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-04-01 11:09:45,355 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:09:45,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:09:45,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-04-01 11:09:45,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-04-01 11:09:45,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:45,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-04-01 11:09:45,362 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2023-04-01 11:09:45,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:09:45,362 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-04-01 11:09:45,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-04-01 11:09:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 11:09:45,363 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:09:45,363 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:09:45,370 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 11:09:45,568 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 11:09:45,568 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:09:45,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:09:45,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1932111211, now seen corresponding path program 2 times [2023-04-01 11:09:45,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:09:45,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571791348] [2023-04-01 11:09:45,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:09:45,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:09:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:09:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:45,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:09:45,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571791348] [2023-04-01 11:09:45,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571791348] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:09:45,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445238956] [2023-04-01 11:09:45,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:09:45,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:09:45,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:09:45,850 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 11:09:45,853 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 11:09:45,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 11:09:45,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:09:45,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 11:09:45,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:09:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:45,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:09:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:46,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445238956] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:09:46,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [62397167] [2023-04-01 11:09:46,018 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 11:09:46,018 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:09:46,018 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:09:46,018 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:09:46,018 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:09:46,054 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:09:46,220 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-01 11:09:46,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:09:46,236 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:09:46,474 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '317#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:09:46,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:09:46,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:09:46,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-04-01 11:09:46,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091162598] [2023-04-01 11:09:46,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:09:46,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 11:09:46,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:09:46,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 11:09:46,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2023-04-01 11:09:46,477 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:46,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:09:46,893 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-04-01 11:09:46,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:09:46,893 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-01 11:09:46,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:09:46,894 INFO L225 Difference]: With dead ends: 26 [2023-04-01 11:09:46,894 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 11:09:46,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2023-04-01 11:09:46,895 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:09:46,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:09:46,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 11:09:46,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 11:09:46,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2023-04-01 11:09:46,900 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2023-04-01 11:09:46,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:09:46,900 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2023-04-01 11:09:46,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2023-04-01 11:09:46,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 11:09:46,900 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:09:46,901 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:09:46,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 11:09:47,105 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 11:09:47,105 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:09:47,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:09:47,105 INFO L85 PathProgramCache]: Analyzing trace with hash -831935573, now seen corresponding path program 3 times [2023-04-01 11:09:47,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:09:47,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117333674] [2023-04-01 11:09:47,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:09:47,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:09:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:09:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:47,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:09:47,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117333674] [2023-04-01 11:09:47,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117333674] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:09:47,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539082310] [2023-04-01 11:09:47,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:09:47,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:09:47,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:09:47,369 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 11:09:47,371 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 11:09:47,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 11:09:47,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:09:47,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 11:09:47,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:09:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:47,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:09:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:47,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539082310] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:09:47,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [263776982] [2023-04-01 11:09:47,865 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 11:09:47,865 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:09:47,865 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:09:47,865 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:09:47,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:09:47,888 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:09:48,016 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-01 11:09:48,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:09:48,026 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:09:48,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '566#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:09:48,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:09:48,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:09:48,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2023-04-01 11:09:48,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023849394] [2023-04-01 11:09:48,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:09:48,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-04-01 11:09:48,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:09:48,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-04-01 11:09:48,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1297, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 11:09:48,333 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 34 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:58,574 WARN L223 SmtUtils]: Spent 5.80s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 11:10:10,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:10:10,749 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2023-04-01 11:10:10,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 11:10:10,750 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-04-01 11:10:10,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:10:10,750 INFO L225 Difference]: With dead ends: 38 [2023-04-01 11:10:10,750 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 11:10:10,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=683, Invalid=1867, Unknown=0, NotChecked=0, Total=2550 [2023-04-01 11:10:10,752 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 11:10:10,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 11:10:10,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 11:10:10,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-01 11:10:10,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:10:10,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2023-04-01 11:10:10,759 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2023-04-01 11:10:10,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:10:10,759 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2023-04-01 11:10:10,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:10:10,759 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2023-04-01 11:10:10,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 11:10:10,760 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:10:10,760 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:10:10,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 11:10:10,960 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 11:10:10,961 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:10:10,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:10:10,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1018599467, now seen corresponding path program 4 times [2023-04-01 11:10:10,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:10:10,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395381576] [2023-04-01 11:10:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:10:10,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:10:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:10:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:10:11,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:10:11,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395381576] [2023-04-01 11:10:11,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395381576] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:10:11,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780011777] [2023-04-01 11:10:11,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 11:10:11,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:10:11,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:10:11,776 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 11:10:11,778 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 11:10:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:10:11,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-01 11:10:11,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:10:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:10:12,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:10:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:10:13,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780011777] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:10:13,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1215864823] [2023-04-01 11:10:13,638 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 11:10:13,639 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:10:13,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:10:13,639 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:10:13,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:10:13,660 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:10:13,765 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-01 11:10:13,770 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:10:13,773 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:10:14,255 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '983#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:10:14,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:10:14,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:10:14,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 70 [2023-04-01 11:10:14,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369870340] [2023-04-01 11:10:14,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:10:14,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-04-01 11:10:14,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:10:14,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-04-01 11:10:14,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1255, Invalid=4597, Unknown=0, NotChecked=0, Total=5852 [2023-04-01 11:10:14,259 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 70 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 70 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:10:16,635 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~y~0 4294967296))) (and (< (mod (+ 20 c_main_~x~0) 4294967296) .cse0) (< (mod (+ 19 c_main_~x~0) 4294967296) .cse0) (< (mod (+ 9 c_main_~x~0) 4294967296) .cse0) (< (mod (+ 3 c_main_~x~0) 4294967296) .cse0) (< (mod (+ 12 c_main_~x~0) 4294967296) .cse0) (< (mod (+ 16 c_main_~x~0) 4294967296) .cse0) (< (mod (+ c_main_~x~0 1) 4294967296) .cse0) (< (mod (+ 8 c_main_~x~0) 4294967296) .cse0) (< (mod (+ 13 c_main_~x~0) 4294967296) .cse0) (< (mod (+ 6 c_main_~x~0) 4294967296) .cse0) (< (mod (+ 4 c_main_~x~0) 4294967296) .cse0) (< (mod (+ 5 c_main_~x~0) 4294967296) .cse0) (< (mod (+ 2 c_main_~x~0) 4294967296) .cse0) (< (mod (+ 14 c_main_~x~0) 4294967296) .cse0) (< (mod c_main_~x~0 4294967296) .cse0) (< (mod (+ 15 c_main_~x~0) 4294967296) .cse0) (< (mod (+ 18 c_main_~x~0) 4294967296) .cse0) (< (mod (+ 22 c_main_~x~0) 4294967296) .cse0) (< (mod (+ 10 c_main_~x~0) 4294967296) .cse0) (< (mod (+ 21 c_main_~x~0) 4294967296) .cse0) (< (mod (+ c_main_~x~0 11) 4294967296) .cse0) (< (mod (+ 17 c_main_~x~0) 4294967296) .cse0) (< (mod (+ 7 c_main_~x~0) 4294967296) .cse0))) is different from false