/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/nla-digbench-scaling/divbin_valuebound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:15:29,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:15:29,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:15:29,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:15:29,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:15:29,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:15:29,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:15:29,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:15:29,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:15:29,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:15:29,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:15:29,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:15:29,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:15:29,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:15:29,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:15:29,320 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:15:29,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:15:29,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:15:29,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:15:29,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:15:29,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:15:29,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:15:29,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:15:29,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:15:29,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 05:15:29,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:15:29,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:15:29,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:15:29,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:15:29,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:15:29,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:15:29,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:15:29,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:15:29,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:15:29,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:15:29,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:15:29,348 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 05:15:29,376 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:15:29,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:15:29,377 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:15:29,377 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:15:29,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:15:29,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:15:29,378 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:15:29,379 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:15:29,379 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:15:29,379 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:15:29,379 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:15:29,380 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:15:29,380 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:15:29,380 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:15:29,380 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:15:29,380 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:15:29,380 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:15:29,380 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:15:29,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:15:29,381 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:15:29,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:15:29,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:15:29,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:15:29,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:15:29,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:15:29,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:15:29,382 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:15:29,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:15:29,383 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:15:29,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:15:29,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:15:29,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:15:29,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:15:29,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:15:29,384 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:15:29,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:15:29,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:15:29,384 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:15:29,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:15:29,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:15:29,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:15:29,384 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:15:29,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:15:29,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:15:29,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:15:29,639 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:15:29,640 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:15:29,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i [2023-04-01 05:15:30,772 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:15:30,948 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:15:30,949 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i [2023-04-01 05:15:30,954 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85a4c9b9c/accecc160eb646389c6d7e6ddaeba32d/FLAG4898acd6b [2023-04-01 05:15:30,966 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85a4c9b9c/accecc160eb646389c6d7e6ddaeba32d [2023-04-01 05:15:30,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:15:30,971 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:15:30,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:15:30,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:15:30,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:15:30,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:15:30" (1/1) ... [2023-04-01 05:15:30,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52340606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:15:30, skipping insertion in model container [2023-04-01 05:15:30,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:15:30" (1/1) ... [2023-04-01 05:15:30,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:15:31,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:15:31,152 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/nla-digbench-scaling/divbin_valuebound20.i[950,963] [2023-04-01 05:15:31,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:15:31,189 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:15:31,201 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/nla-digbench-scaling/divbin_valuebound20.i[950,963] [2023-04-01 05:15:31,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:15:31,234 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:15:31,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:15:31 WrapperNode [2023-04-01 05:15:31,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:15:31,235 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:15:31,235 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:15:31,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:15:31,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:15:31" (1/1) ... [2023-04-01 05:15:31,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:15:31" (1/1) ... [2023-04-01 05:15:31,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:15:31" (1/1) ... [2023-04-01 05:15:31,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:15:31" (1/1) ... [2023-04-01 05:15:31,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:15:31" (1/1) ... [2023-04-01 05:15:31,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:15:31" (1/1) ... [2023-04-01 05:15:31,270 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:15:31" (1/1) ... [2023-04-01 05:15:31,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:15:31" (1/1) ... [2023-04-01 05:15:31,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:15:31,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:15:31,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:15:31,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:15:31,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:15:31" (1/1) ... [2023-04-01 05:15:31,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:15:31,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:15:31,306 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 05:15:31,313 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 05:15:31,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:15:31,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:15:31,337 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:15:31,338 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 05:15:31,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 05:15:31,338 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:15:31,338 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:15:31,338 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:15:31,338 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 05:15:31,338 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 05:15:31,339 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:15:31,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:15:31,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 05:15:31,339 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 05:15:31,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 05:15:31,339 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:15:31,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:15:31,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:15:31,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:15:31,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:15:31,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:15:31,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:15:31,446 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:15:31,448 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:15:31,638 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:15:31,732 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:15:31,732 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 05:15:31,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:15:31 BoogieIcfgContainer [2023-04-01 05:15:31,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:15:31,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:15:31,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:15:31,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:15:31,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:15:30" (1/3) ... [2023-04-01 05:15:31,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53298a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:15:31, skipping insertion in model container [2023-04-01 05:15:31,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:15:31" (2/3) ... [2023-04-01 05:15:31,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53298a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:15:31, skipping insertion in model container [2023-04-01 05:15:31,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:15:31" (3/3) ... [2023-04-01 05:15:31,751 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_valuebound20.i [2023-04-01 05:15:31,770 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:15:31,770 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:15:31,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:15:31,833 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;@2f74bf72, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:15:31,834 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:15:31,837 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 05:15:31,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 05:15:31,846 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:15:31,847 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:15:31,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:15:31,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:15:31,855 INFO L85 PathProgramCache]: Analyzing trace with hash -231294238, now seen corresponding path program 1 times [2023-04-01 05:15:31,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:15:31,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775793190] [2023-04-01 05:15:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:15:31,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:15:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:15:32,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:15:32,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775793190] [2023-04-01 05:15:32,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-01 05:15:32,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981558328] [2023-04-01 05:15:32,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:15:32,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:15:32,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:15:32,046 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 05:15:32,047 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 05:15:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:15:32,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 05:15:32,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:15:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:15:32,159 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:15:32,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981558328] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:15:32,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:15:32,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 05:15:32,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413800462] [2023-04-01 05:15:32,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:15:32,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 05:15:32,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:15:32,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 05:15:32,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:15:32,212 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 05:15:32,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:15:32,263 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2023-04-01 05:15:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 05:15:32,266 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 25 [2023-04-01 05:15:32,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:15:32,273 INFO L225 Difference]: With dead ends: 43 [2023-04-01 05:15:32,273 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 05:15:32,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:15:32,280 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:15:32,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:15:32,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 05:15:32,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 05:15:32,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 05:15:32,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-04-01 05:15:32,321 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 25 [2023-04-01 05:15:32,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:15:32,323 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-04-01 05:15:32,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 05:15:32,324 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-04-01 05:15:32,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 05:15:32,325 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:15:32,326 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:15:32,335 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 05:15:32,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 05:15:32,532 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:15:32,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:15:32,533 INFO L85 PathProgramCache]: Analyzing trace with hash -43719932, now seen corresponding path program 1 times [2023-04-01 05:15:32,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:15:32,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381453759] [2023-04-01 05:15:32,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:15:32,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:15:32,579 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:15:32,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093440952] [2023-04-01 05:15:32,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:15:32,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:15:32,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:15:32,591 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 05:15:32,592 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 05:15:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:15:32,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 05:15:32,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:15:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 05:15:32,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:15:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:15:33,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:15:33,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381453759] [2023-04-01 05:15:33,069 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:15:33,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093440952] [2023-04-01 05:15:33,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093440952] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 05:15:33,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:15:33,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2023-04-01 05:15:33,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825376331] [2023-04-01 05:15:33,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:15:33,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 05:15:33,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:15:33,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 05:15:33,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-04-01 05:15:33,072 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 05:15:34,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:15:34,096 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2023-04-01 05:15:34,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:15:34,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 26 [2023-04-01 05:15:34,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:15:34,098 INFO L225 Difference]: With dead ends: 37 [2023-04-01 05:15:34,098 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 05:15:34,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-04-01 05:15:34,100 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:15:34,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 92 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 05:15:34,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 05:15:34,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-01 05:15:34,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 05:15:34,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-04-01 05:15:34,108 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 26 [2023-04-01 05:15:34,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:15:34,108 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-04-01 05:15:34,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 05:15:34,110 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-04-01 05:15:34,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 05:15:34,112 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:15:34,113 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:15:34,121 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 05:15:34,318 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,SelfDestructingSolverStorable1 [2023-04-01 05:15:34,318 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:15:34,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:15:34,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1480359199, now seen corresponding path program 1 times [2023-04-01 05:15:34,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:15:34,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333470203] [2023-04-01 05:15:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:15:34,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:15:34,333 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:15:34,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039596156] [2023-04-01 05:15:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:15:34,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:15:34,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:15:34,335 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 05:15:34,345 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 05:15:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:15:34,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-01 05:15:34,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:15:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 05:15:34,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:15:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:15:34,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:15:34,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333470203] [2023-04-01 05:15:34,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:15:34,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039596156] [2023-04-01 05:15:34,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039596156] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 05:15:34,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:15:34,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-04-01 05:15:34,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843002156] [2023-04-01 05:15:34,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:15:34,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 05:15:34,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:15:34,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 05:15:34,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-04-01 05:15:34,840 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 05:15:36,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-04-01 05:15:39,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-04-01 05:15:41,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-04-01 05:15:43,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-04-01 05:15:45,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-04-01 05:15:47,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-04-01 05:15:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:15:47,247 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2023-04-01 05:15:47,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:15:47,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 28 [2023-04-01 05:15:47,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:15:47,248 INFO L225 Difference]: With dead ends: 44 [2023-04-01 05:15:47,249 INFO L226 Difference]: Without dead ends: 42 [2023-04-01 05:15:47,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-04-01 05:15:47,250 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2023-04-01 05:15:47,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 96 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 6 Unknown, 0 Unchecked, 12.4s Time] [2023-04-01 05:15:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-01 05:15:47,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2023-04-01 05:15:47,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 05:15:47,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2023-04-01 05:15:47,263 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 28 [2023-04-01 05:15:47,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:15:47,263 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2023-04-01 05:15:47,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 05:15:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2023-04-01 05:15:47,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 05:15:47,265 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:15:47,265 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:15:47,277 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 05:15:47,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:15:47,466 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:15:47,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:15:47,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1735240943, now seen corresponding path program 1 times [2023-04-01 05:15:47,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:15:47,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025751309] [2023-04-01 05:15:47,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:15:47,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:15:47,481 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:15:47,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098589183] [2023-04-01 05:15:47,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:15:47,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:15:47,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:15:47,485 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 05:15:47,493 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 05:15:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:15:47,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 05:15:47,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:15:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:15:47,554 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:15:47,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:15:47,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025751309] [2023-04-01 05:15:47,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:15:47,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098589183] [2023-04-01 05:15:47,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098589183] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:15:47,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:15:47,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:15:47,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790545756] [2023-04-01 05:15:47,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:15:47,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:15:47,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:15:47,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:15:47,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:15:47,561 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 05:15:47,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:15:47,599 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2023-04-01 05:15:47,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:15:47,599 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 33 [2023-04-01 05:15:47,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:15:47,601 INFO L225 Difference]: With dead ends: 50 [2023-04-01 05:15:47,601 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 05:15:47,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 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 05:15:47,605 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:15:47,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:15:47,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 05:15:47,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-01 05:15:47,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 05:15:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-04-01 05:15:47,613 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 33 [2023-04-01 05:15:47,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:15:47,614 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-04-01 05:15:47,614 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 05:15:47,614 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-04-01 05:15:47,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 05:15:47,615 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:15:47,615 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:15:47,629 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 05:15:47,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:15:47,825 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:15:47,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:15:47,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1167057084, now seen corresponding path program 1 times [2023-04-01 05:15:47,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:15:47,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377372693] [2023-04-01 05:15:47,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:15:47,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:15:47,839 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:15:47,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162077944] [2023-04-01 05:15:47,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:15:47,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:15:47,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:15:47,840 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 05:15:47,843 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 05:15:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:15:47,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 05:15:47,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:15:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 05:15:47,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:15:48,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 05:15:48,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:15:48,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377372693] [2023-04-01 05:15:48,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:15:48,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162077944] [2023-04-01 05:15:48,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162077944] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:15:48,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1403935336] [2023-04-01 05:15:48,062 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-04-01 05:15:48,062 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:15:48,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:15:48,068 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:15:48,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:15:48,114 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:15:48,278 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-01 05:15:48,282 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2023-04-01 05:15:48,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:15:48,288 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:15:48,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1403935336] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:15:48,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:15:48,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7, 6] total 19 [2023-04-01 05:15:48,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587286409] [2023-04-01 05:15:48,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:15:48,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 05:15:48,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:15:48,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 05:15:48,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-04-01 05:15:48,519 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 12 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 05:15:49,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:15:49,320 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2023-04-01 05:15:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 05:15:49,320 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 34 [2023-04-01 05:15:49,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:15:49,321 INFO L225 Difference]: With dead ends: 41 [2023-04-01 05:15:49,321 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 05:15:49,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2023-04-01 05:15:49,322 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 59 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 05:15:49,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 7 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 05:15:49,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 05:15:49,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-01 05:15:49,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 05:15:49,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-04-01 05:15:49,335 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 34 [2023-04-01 05:15:49,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:15:49,336 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-04-01 05:15:49,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 05:15:49,336 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-04-01 05:15:49,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 05:15:49,340 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:15:49,341 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:15:49,352 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 05:15:49,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:15:49,547 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:15:49,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:15:49,547 INFO L85 PathProgramCache]: Analyzing trace with hash -428568972, now seen corresponding path program 1 times [2023-04-01 05:15:49,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:15:49,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559329195] [2023-04-01 05:15:49,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:15:49,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:15:49,558 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:15:49,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104541438] [2023-04-01 05:15:49,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:15:49,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:15:49,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:15:49,560 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 05:15:49,583 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 05:15:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:15:49,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2023-04-01 05:15:49,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:15:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 05:15:50,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:16:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:16:07,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:16:07,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559329195] [2023-04-01 05:16:07,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:16:07,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104541438] [2023-04-01 05:16:07,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104541438] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:16:07,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [345436456] [2023-04-01 05:16:07,592 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 05:16:07,592 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:16:07,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:16:07,593 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:16:07,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:16:07,614 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:16:07,935 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-01 05:16:07,971 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2023-04-01 05:16:07,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:16:07,977 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:16:18,869 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1592#(and (exists ((v_main_~A~0_BEFORE_CALL_33 Int) (v_main_~b~0_BEFORE_CALL_21 Int) (v_main_~r~0_BEFORE_CALL_20 Int) (v_main_~q~0_BEFORE_CALL_20 Int)) (and (or (and (<= 1 |#StackHeapBarrier|) (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (<= 1 |#StackHeapBarrier|) (= v_main_~r~0_BEFORE_CALL_20 v_main_~A~0_BEFORE_CALL_33) (= v_main_~q~0_BEFORE_CALL_20 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))) (not (= (mod v_main_~A~0_BEFORE_CALL_33 4294967296) (mod (+ v_main_~r~0_BEFORE_CALL_20 (* v_main_~q~0_BEFORE_CALL_20 v_main_~b~0_BEFORE_CALL_21)) 4294967296))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:16:18,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:16:18,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:16:18,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2023-04-01 05:16:18,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118691762] [2023-04-01 05:16:18,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:16:18,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 05:16:18,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:16:18,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 05:16:18,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=698, Unknown=2, NotChecked=0, Total=812 [2023-04-01 05:16:18,872 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 16 states have internal predecessors, (32), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-01 05:16:20,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:16:22,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:16:24,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:16:30,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-04-01 05:16:32,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-04-01 05:16:34,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:16:36,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:16:36,431 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2023-04-01 05:16:36,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 05:16:36,432 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 16 states have internal predecessors, (32), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 35 [2023-04-01 05:16:36,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:16:36,433 INFO L225 Difference]: With dead ends: 44 [2023-04-01 05:16:36,433 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 05:16:36,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=177, Invalid=1080, Unknown=3, NotChecked=0, Total=1260 [2023-04-01 05:16:36,434 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 30 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 11 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2023-04-01 05:16:36,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 134 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 209 Invalid, 3 Unknown, 0 Unchecked, 13.8s Time] [2023-04-01 05:16:36,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 05:16:36,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2023-04-01 05:16:36,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 05:16:36,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-04-01 05:16:36,444 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 35 [2023-04-01 05:16:36,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:16:36,444 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-04-01 05:16:36,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 16 states have internal predecessors, (32), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-01 05:16:36,445 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-04-01 05:16:36,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 05:16:36,445 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:16:36,446 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:16:36,458 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 05:16:36,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:16:36,652 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:16:36,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:16:36,653 INFO L85 PathProgramCache]: Analyzing trace with hash -621067393, now seen corresponding path program 2 times [2023-04-01 05:16:36,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:16:36,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974075554] [2023-04-01 05:16:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:16:36,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:16:36,663 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:16:36,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769879974] [2023-04-01 05:16:36,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:16:36,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:16:36,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:16:36,679 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 05:16:36,685 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 05:16:37,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 05:16:37,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:16:37,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 05:16:37,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:16:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 05:16:37,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:16:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 05:16:37,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:16:37,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974075554] [2023-04-01 05:16:37,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:16:37,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769879974] [2023-04-01 05:16:37,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769879974] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:16:37,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1945392468] [2023-04-01 05:16:37,844 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 05:16:37,844 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:16:37,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:16:37,845 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:16:37,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:16:37,861 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:16:38,144 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-01 05:16:38,207 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2023-04-01 05:16:38,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:16:38,212 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:16:38,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2003#(and (exists ((v_main_~b~0_BEFORE_CALL_34 Int) (v_main_~r~0_BEFORE_CALL_29 Int) (v_main_~q~0_BEFORE_CALL_29 Int) (v_main_~A~0_BEFORE_CALL_49 Int)) (and (not (= (mod v_main_~A~0_BEFORE_CALL_49 4294967296) (mod (+ v_main_~r~0_BEFORE_CALL_29 (* v_main_~q~0_BEFORE_CALL_29 v_main_~b~0_BEFORE_CALL_34)) 4294967296))) (or (and (<= 1 |#StackHeapBarrier|) (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (= v_main_~r~0_BEFORE_CALL_29 v_main_~A~0_BEFORE_CALL_49) (<= 1 |#StackHeapBarrier|) (= |#NULL.offset| 0) (= v_main_~q~0_BEFORE_CALL_29 0) (= |#NULL.base| 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:16:38,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:16:38,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:16:38,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2023-04-01 05:16:38,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699280846] [2023-04-01 05:16:38,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:16:38,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 05:16:38,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:16:38,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 05:16:38,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2023-04-01 05:16:38,866 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-01 05:16:41,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:16:42,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []