/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:25:30,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:25:30,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:25:30,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:25:30,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:25:30,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:25:30,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:25:30,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:25:30,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:25:30,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:25:30,158 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:25:30,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:25:30,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:25:30,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:25:30,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:25:30,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:25:30,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:25:30,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:25:30,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:25:30,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:25:30,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:25:30,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:25:30,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:25:30,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:25:30,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 11:25:30,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:25:30,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:25:30,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:25:30,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:25:30,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:25:30,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:25:30,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:25:30,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:25:30,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:25:30,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:25:30,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:25:30,192 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 11:25:30,225 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:25:30,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:25:30,225 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:25:30,225 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:25:30,226 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:25:30,226 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:25:30,226 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:25:30,226 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:25:30,226 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:25:30,227 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:25:30,227 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:25:30,227 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:25:30,227 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:25:30,227 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:25:30,227 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:25:30,228 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:25:30,228 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:25:30,228 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:25:30,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:25:30,228 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:25:30,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:25:30,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:25:30,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:25:30,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:25:30,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:25:30,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:25:30,229 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:25:30,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:25:30,229 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:25:30,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:25:30,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:25:30,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:25:30,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:25:30,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:25:30,230 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:25:30,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:25:30,230 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:25:30,230 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:25:30,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:25:30,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:25:30,231 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:25:30,231 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:25:30,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:25:30,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:25:30,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:25:30,469 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:25:30,470 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:25:30,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c [2023-04-01 11:25:31,545 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:25:31,698 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:25:31,698 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c [2023-04-01 11:25:31,703 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae5d0ec9e/9b771c6d293c45a08011dbb4f1261df6/FLAG110dc089c [2023-04-01 11:25:31,714 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae5d0ec9e/9b771c6d293c45a08011dbb4f1261df6 [2023-04-01 11:25:31,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:25:31,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:25:31,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:25:31,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:25:31,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:25:31,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:25:31" (1/1) ... [2023-04-01 11:25:31,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a6544f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:31, skipping insertion in model container [2023-04-01 11:25:31,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:25:31" (1/1) ... [2023-04-01 11:25:31,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:25:31,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:25:31,833 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/hard-ll_unwindbound5.c[538,551] [2023-04-01 11:25:31,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:25:31,863 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:25:31,873 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/hard-ll_unwindbound5.c[538,551] [2023-04-01 11:25:31,886 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:25:31,895 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:25:31,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:31 WrapperNode [2023-04-01 11:25:31,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:25:31,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:25:31,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:25:31,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:25:31,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:31" (1/1) ... [2023-04-01 11:25:31,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:31" (1/1) ... [2023-04-01 11:25:31,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:31" (1/1) ... [2023-04-01 11:25:31,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:31" (1/1) ... [2023-04-01 11:25:31,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:31" (1/1) ... [2023-04-01 11:25:31,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:31" (1/1) ... [2023-04-01 11:25:31,922 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:31" (1/1) ... [2023-04-01 11:25:31,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:31" (1/1) ... [2023-04-01 11:25:31,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:25:31,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:25:31,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:25:31,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:25:31,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:31" (1/1) ... [2023-04-01 11:25:31,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:25:31,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:31,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 11:25:31,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 11:25:31,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:25:31,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:25:31,988 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:25:31,988 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:25:31,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:25:31,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:25:31,989 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:25:31,989 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:25:31,989 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:25:31,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:25:31,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 11:25:31,989 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:25:31,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:25:31,989 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:25:31,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:25:31,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:25:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:25:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:25:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:25:31,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:25:32,037 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:25:32,039 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:25:32,189 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:25:32,217 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:25:32,217 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 11:25:32,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:25:32 BoogieIcfgContainer [2023-04-01 11:25:32,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:25:32,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:25:32,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:25:32,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:25:32,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:25:31" (1/3) ... [2023-04-01 11:25:32,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251952c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:25:32, skipping insertion in model container [2023-04-01 11:25:32,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:31" (2/3) ... [2023-04-01 11:25:32,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251952c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:25:32, skipping insertion in model container [2023-04-01 11:25:32,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:25:32" (3/3) ... [2023-04-01 11:25:32,233 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound5.c [2023-04-01 11:25:32,245 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:25:32,245 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:25:32,279 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:25:32,284 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;@16bd4cd4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:25:32,284 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:25:32,288 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 11:25:32,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 11:25:32,293 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:32,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:32,294 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:32,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:32,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1281912795, now seen corresponding path program 1 times [2023-04-01 11:25:32,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:32,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458891113] [2023-04-01 11:25:32,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:32,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:32,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:32,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458891113] [2023-04-01 11:25:32,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-01 11:25:32,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326872529] [2023-04-01 11:25:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:32,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:32,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:32,416 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:25:32,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 11:25:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:32,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 11:25:32,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:25:32,508 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:25:32,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326872529] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:25:32,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:25:32,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:25:32,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357374785] [2023-04-01 11:25:32,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:25:32,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:25:32,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:32,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:25:32,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:25:32,538 INFO L87 Difference]: Start difference. First operand has 32 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:25:32,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:32,575 INFO L93 Difference]: Finished difference Result 55 states and 86 transitions. [2023-04-01 11:25:32,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:25:32,579 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-04-01 11:25:32,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:32,583 INFO L225 Difference]: With dead ends: 55 [2023-04-01 11:25:32,584 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 11:25:32,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 11:25:32,588 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:32,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:25:32,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 11:25:32,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 11:25:32,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 11:25:32,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-04-01 11:25:32,614 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 15 [2023-04-01 11:25:32,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:32,615 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-04-01 11:25:32,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:25:32,615 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-04-01 11:25:32,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 11:25:32,615 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:32,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:32,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 11:25:32,816 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 11:25:32,817 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:32,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:32,817 INFO L85 PathProgramCache]: Analyzing trace with hash 819854385, now seen corresponding path program 1 times [2023-04-01 11:25:32,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:32,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597310218] [2023-04-01 11:25:32,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:32,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:25:32,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:32,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597310218] [2023-04-01 11:25:32,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597310218] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:25:32,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:25:32,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:25:32,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400340200] [2023-04-01 11:25:32,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:25:32,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:25:32,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:32,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:25:32,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:25:32,990 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:25:33,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:33,058 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2023-04-01 11:25:33,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:25:33,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-04-01 11:25:33,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:33,060 INFO L225 Difference]: With dead ends: 41 [2023-04-01 11:25:33,060 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 11:25:33,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:25:33,069 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:33,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 101 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:25:33,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 11:25:33,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2023-04-01 11:25:33,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 11:25:33,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-04-01 11:25:33,077 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 15 [2023-04-01 11:25:33,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:33,077 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-04-01 11:25:33,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:25:33,077 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-04-01 11:25:33,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 11:25:33,078 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:33,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:33,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:25:33,078 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:33,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:33,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1158906488, now seen corresponding path program 1 times [2023-04-01 11:25:33,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:33,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692786193] [2023-04-01 11:25:33,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:33,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:33,095 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:33,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766423067] [2023-04-01 11:25:33,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:33,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:33,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:33,100 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:25:33,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 11:25:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:33,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 11:25:33,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:25:33,196 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:25:33,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:33,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692786193] [2023-04-01 11:25:33,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:33,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766423067] [2023-04-01 11:25:33,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766423067] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:25:33,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:25:33,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:25:33,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222714402] [2023-04-01 11:25:33,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:25:33,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:25:33,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:33,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:25:33,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:25:33,198 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:25:33,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:33,227 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2023-04-01 11:25:33,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 11:25:33,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-04-01 11:25:33,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:33,229 INFO L225 Difference]: With dead ends: 47 [2023-04-01 11:25:33,229 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 11:25:33,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:25:33,231 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:33,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:25:33,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 11:25:33,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-01 11:25:33,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 11:25:33,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-04-01 11:25:33,236 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 17 [2023-04-01 11:25:33,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:33,236 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-04-01 11:25:33,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:25:33,237 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-04-01 11:25:33,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 11:25:33,237 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:33,237 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:33,244 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 11:25:33,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 11:25:33,442 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:33,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:33,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1070508052, now seen corresponding path program 1 times [2023-04-01 11:25:33,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:33,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738723542] [2023-04-01 11:25:33,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:33,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:25:33,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:33,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738723542] [2023-04-01 11:25:33,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738723542] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:25:33,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:25:33,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:25:33,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821033474] [2023-04-01 11:25:33,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:25:33,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:25:33,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:33,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:25:33,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:25:33,527 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 11:25:33,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:33,582 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2023-04-01 11:25:33,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:25:33,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2023-04-01 11:25:33,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:33,586 INFO L225 Difference]: With dead ends: 47 [2023-04-01 11:25:33,586 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 11:25:33,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:25:33,587 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:33,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 101 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:25:33,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 11:25:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2023-04-01 11:25:33,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 11:25:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-04-01 11:25:33,595 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 20 [2023-04-01 11:25:33,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:33,595 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-04-01 11:25:33,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 11:25:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-04-01 11:25:33,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 11:25:33,596 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:33,596 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:33,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 11:25:33,596 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:33,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:33,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1460275665, now seen corresponding path program 1 times [2023-04-01 11:25:33,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:33,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693505268] [2023-04-01 11:25:33,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:33,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:33,605 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:33,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946283425] [2023-04-01 11:25:33,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:33,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:33,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:33,610 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:25:33,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 11:25:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:33,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 11:25:33,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 11:25:33,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:25:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 11:25:33,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:33,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693505268] [2023-04-01 11:25:33,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:33,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946283425] [2023-04-01 11:25:33,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946283425] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:25:33,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [677690707] [2023-04-01 11:25:33,948 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 11:25:33,948 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:25:33,951 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:25:33,954 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:25:33,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:25:34,090 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:25:34,550 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-04-01 11:25:34,588 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 11:25:34,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:25:34,605 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:25:35,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [677690707] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:25:35,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:25:35,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8, 7] total 23 [2023-04-01 11:25:35,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896895656] [2023-04-01 11:25:35,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:25:35,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 11:25:35,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:35,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 11:25:35,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-04-01 11:25:35,344 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 11:25:35,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:35,871 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2023-04-01 11:25:35,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:25:35,871 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2023-04-01 11:25:35,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:35,872 INFO L225 Difference]: With dead ends: 57 [2023-04-01 11:25:35,872 INFO L226 Difference]: Without dead ends: 55 [2023-04-01 11:25:35,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2023-04-01 11:25:35,873 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:35,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 37 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:25:35,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-01 11:25:35,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-04-01 11:25:35,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 11:25:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2023-04-01 11:25:35,884 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 25 [2023-04-01 11:25:35,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:35,885 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2023-04-01 11:25:35,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 11:25:35,885 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2023-04-01 11:25:35,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 11:25:35,886 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:35,887 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:35,903 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 11:25:36,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:36,105 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:36,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:36,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1142294395, now seen corresponding path program 1 times [2023-04-01 11:25:36,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:36,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521495942] [2023-04-01 11:25:36,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:36,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:36,115 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:36,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044248404] [2023-04-01 11:25:36,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:36,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:36,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:36,127 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:25:36,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 11:25:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:36,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:25:36,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:36,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:25:36,226 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:25:36,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:36,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521495942] [2023-04-01 11:25:36,226 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:36,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044248404] [2023-04-01 11:25:36,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044248404] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:25:36,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:25:36,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:25:36,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144677026] [2023-04-01 11:25:36,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:25:36,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:25:36,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:36,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:25:36,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:25:36,229 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 11:25:36,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:36,275 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2023-04-01 11:25:36,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:25:36,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2023-04-01 11:25:36,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:36,277 INFO L225 Difference]: With dead ends: 65 [2023-04-01 11:25:36,277 INFO L226 Difference]: Without dead ends: 57 [2023-04-01 11:25:36,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:25:36,278 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:36,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 92 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:25:36,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-01 11:25:36,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-04-01 11:25:36,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 35 states have internal predecessors, (40), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 11:25:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2023-04-01 11:25:36,286 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 33 [2023-04-01 11:25:36,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:36,287 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2023-04-01 11:25:36,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 11:25:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2023-04-01 11:25:36,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 11:25:36,287 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:36,287 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:36,319 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 11:25:36,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:36,491 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:36,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:36,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1140566517, now seen corresponding path program 1 times [2023-04-01 11:25:36,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:36,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46732461] [2023-04-01 11:25:36,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:36,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:36,506 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:36,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665767179] [2023-04-01 11:25:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:36,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:36,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:36,509 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 11:25:36,511 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 11:25:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:36,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 11:25:36,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:25:36,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:25:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:25:36,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:36,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46732461] [2023-04-01 11:25:36,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:36,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665767179] [2023-04-01 11:25:36,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665767179] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:25:36,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1455988791] [2023-04-01 11:25:36,832 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 11:25:36,832 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:25:36,832 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:25:36,833 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:25:36,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:25:36,900 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:25:37,381 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 59 for LOIs [2023-04-01 11:25:37,399 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 11:25:37,407 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:25:37,410 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:25:38,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1455988791] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:25:38,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:25:38,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [8, 8] total 27 [2023-04-01 11:25:38,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071859855] [2023-04-01 11:25:38,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:25:38,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 11:25:38,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:38,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 11:25:38,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2023-04-01 11:25:38,390 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 11:25:38,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:38,954 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2023-04-01 11:25:38,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 11:25:38,954 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2023-04-01 11:25:38,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:38,955 INFO L225 Difference]: With dead ends: 78 [2023-04-01 11:25:38,955 INFO L226 Difference]: Without dead ends: 54 [2023-04-01 11:25:38,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 11:25:38,956 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:38,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:25:38,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-01 11:25:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-04-01 11:25:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 11:25:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2023-04-01 11:25:38,964 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 33 [2023-04-01 11:25:38,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:38,965 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2023-04-01 11:25:38,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 11:25:38,965 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2023-04-01 11:25:38,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 11:25:38,970 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:38,970 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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 11:25:38,977 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 11:25:39,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:39,177 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:39,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:39,178 INFO L85 PathProgramCache]: Analyzing trace with hash -191139670, now seen corresponding path program 1 times [2023-04-01 11:25:39,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:39,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888671762] [2023-04-01 11:25:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:39,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:39,185 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:39,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754658510] [2023-04-01 11:25:39,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:39,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:39,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:39,195 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 11:25:39,197 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 11:25:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:39,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:25:39,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:25:39,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:25:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:25:39,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:39,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888671762] [2023-04-01 11:25:39,301 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:39,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754658510] [2023-04-01 11:25:39,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754658510] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:25:39,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1950678753] [2023-04-01 11:25:39,302 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 11:25:39,302 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:25:39,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:25:39,303 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:25:39,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:25:39,332 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:25:40,118 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 57 for LOIs [2023-04-01 11:25:40,136 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 11:25:40,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:25:40,144 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:25:41,929 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1897#(and (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 10 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:25:41,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:25:41,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:25:41,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 11:25:41,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885357498] [2023-04-01 11:25:41,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:25:41,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:25:41,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:41,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:25:41,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2023-04-01 11:25:41,931 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-01 11:25:42,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:42,059 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2023-04-01 11:25:42,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 11:25:42,059 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 35 [2023-04-01 11:25:42,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:42,060 INFO L225 Difference]: With dead ends: 117 [2023-04-01 11:25:42,060 INFO L226 Difference]: Without dead ends: 104 [2023-04-01 11:25:42,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2023-04-01 11:25:42,061 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:42,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 115 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:25:42,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-04-01 11:25:42,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2023-04-01 11:25:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 61 states have (on average 1.180327868852459) internal successors, (72), 63 states have internal predecessors, (72), 23 states have call successors, (23), 15 states have call predecessors, (23), 14 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-04-01 11:25:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2023-04-01 11:25:42,075 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 35 [2023-04-01 11:25:42,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:42,075 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2023-04-01 11:25:42,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-01 11:25:42,075 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2023-04-01 11:25:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 11:25:42,075 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:42,076 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:42,088 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 11:25:42,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:42,287 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:42,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:42,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1456686349, now seen corresponding path program 1 times [2023-04-01 11:25:42,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:42,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260228479] [2023-04-01 11:25:42,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:42,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:42,293 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:42,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439517818] [2023-04-01 11:25:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:42,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:42,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:42,297 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 11:25:42,297 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 11:25:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:42,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-01 11:25:42,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 11:25:42,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:25:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 11:25:42,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:42,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260228479] [2023-04-01 11:25:42,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:42,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439517818] [2023-04-01 11:25:42,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439517818] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:25:42,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [304750643] [2023-04-01 11:25:42,574 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 11:25:42,574 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:25:42,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:25:42,575 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:25:42,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:25:42,606 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:25:43,241 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 57 for LOIs [2023-04-01 11:25:43,256 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 11:25:43,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:25:43,264 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:25:46,674 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2503#(and (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 10 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:25:46,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:25:46,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:25:46,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2023-04-01 11:25:46,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722228673] [2023-04-01 11:25:46,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:25:46,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 11:25:46,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:46,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 11:25:46,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2023-04-01 11:25:46,675 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2023-04-01 11:25:47,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:47,026 INFO L93 Difference]: Finished difference Result 139 states and 169 transitions. [2023-04-01 11:25:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:25:47,027 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 43 [2023-04-01 11:25:47,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:47,028 INFO L225 Difference]: With dead ends: 139 [2023-04-01 11:25:47,028 INFO L226 Difference]: Without dead ends: 119 [2023-04-01 11:25:47,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2023-04-01 11:25:47,030 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 58 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:47,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 193 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 11:25:47,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-04-01 11:25:47,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2023-04-01 11:25:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 76 states have internal predecessors, (83), 28 states have call successors, (28), 17 states have call predecessors, (28), 16 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2023-04-01 11:25:47,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 135 transitions. [2023-04-01 11:25:47,042 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 135 transitions. Word has length 43 [2023-04-01 11:25:47,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:47,042 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 135 transitions. [2023-04-01 11:25:47,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2023-04-01 11:25:47,043 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 135 transitions. [2023-04-01 11:25:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 11:25:47,043 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:47,043 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:47,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 11:25:47,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:47,250 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:47,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:47,250 INFO L85 PathProgramCache]: Analyzing trace with hash -840800345, now seen corresponding path program 1 times [2023-04-01 11:25:47,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:47,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442950602] [2023-04-01 11:25:47,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:47,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:47,256 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:47,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109443051] [2023-04-01 11:25:47,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:47,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:47,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:47,258 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:25:47,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 11:25:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:47,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 11:25:47,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 11:25:47,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:25:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 11:25:47,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:47,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442950602] [2023-04-01 11:25:47,410 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:47,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109443051] [2023-04-01 11:25:47,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109443051] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:25:47,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [790846750] [2023-04-01 11:25:47,411 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 11:25:47,411 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:25:47,411 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:25:47,411 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:25:47,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:25:47,434 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:25:48,077 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 57 for LOIs [2023-04-01 11:25:48,091 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 11:25:48,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:25:48,099 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:25:50,049 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3211#(and (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 10 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:25:50,049 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:25:50,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:25:50,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-04-01 11:25:50,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426863110] [2023-04-01 11:25:50,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:25:50,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 11:25:50,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:50,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 11:25:50,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2023-04-01 11:25:50,051 INFO L87 Difference]: Start difference. First operand 117 states and 135 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2023-04-01 11:25:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:50,163 INFO L93 Difference]: Finished difference Result 165 states and 188 transitions. [2023-04-01 11:25:50,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 11:25:50,164 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 51 [2023-04-01 11:25:50,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:50,165 INFO L225 Difference]: With dead ends: 165 [2023-04-01 11:25:50,165 INFO L226 Difference]: Without dead ends: 150 [2023-04-01 11:25:50,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2023-04-01 11:25:50,166 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:50,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 121 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:25:50,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-04-01 11:25:50,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 145. [2023-04-01 11:25:50,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 92 states have (on average 1.1304347826086956) internal successors, (104), 96 states have internal predecessors, (104), 32 states have call successors, (32), 21 states have call predecessors, (32), 20 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-04-01 11:25:50,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 164 transitions. [2023-04-01 11:25:50,184 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 164 transitions. Word has length 51 [2023-04-01 11:25:50,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:50,184 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 164 transitions. [2023-04-01 11:25:50,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2023-04-01 11:25:50,184 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 164 transitions. [2023-04-01 11:25:50,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 11:25:50,185 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:50,185 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:50,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 11:25:50,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 11:25:50,390 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:50,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:50,390 INFO L85 PathProgramCache]: Analyzing trace with hash -839072467, now seen corresponding path program 1 times [2023-04-01 11:25:50,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:50,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559085243] [2023-04-01 11:25:50,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:50,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:50,396 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:50,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764607801] [2023-04-01 11:25:50,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:50,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:50,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:50,409 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:25:50,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 11:25:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:50,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 11:25:50,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 11:25:50,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:25:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 11:25:51,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:51,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559085243] [2023-04-01 11:25:51,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:51,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764607801] [2023-04-01 11:25:51,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764607801] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:25:51,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [410738131] [2023-04-01 11:25:51,228 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 11:25:51,229 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:25:51,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:25:51,229 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:25:51,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:25:51,266 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:25:51,977 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2023-04-01 11:25:51,994 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 11:25:52,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:25:52,002 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:25:57,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3997#(and (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 10 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:25:57,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:25:57,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:25:57,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2023-04-01 11:25:57,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752722282] [2023-04-01 11:25:57,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:25:57,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 11:25:57,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:57,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 11:25:57,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2023-04-01 11:25:57,288 INFO L87 Difference]: Start difference. First operand 145 states and 164 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-01 11:25:58,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:58,050 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2023-04-01 11:25:58,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 11:25:58,051 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 51 [2023-04-01 11:25:58,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:58,052 INFO L225 Difference]: With dead ends: 160 [2023-04-01 11:25:58,052 INFO L226 Difference]: Without dead ends: 158 [2023-04-01 11:25:58,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 11:25:58,053 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 33 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:58,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 205 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 11:25:58,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-04-01 11:25:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 153. [2023-04-01 11:25:58,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 98 states have (on average 1.1122448979591837) internal successors, (109), 102 states have internal predecessors, (109), 32 states have call successors, (32), 23 states have call predecessors, (32), 22 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-04-01 11:25:58,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 169 transitions. [2023-04-01 11:25:58,073 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 169 transitions. Word has length 51 [2023-04-01 11:25:58,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:58,073 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 169 transitions. [2023-04-01 11:25:58,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-01 11:25:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 169 transitions. [2023-04-01 11:25:58,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 11:25:58,074 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:58,074 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:58,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 11:25:58,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:58,285 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:58,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:58,286 INFO L85 PathProgramCache]: Analyzing trace with hash -309101988, now seen corresponding path program 1 times [2023-04-01 11:25:58,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:58,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797385679] [2023-04-01 11:25:58,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:58,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:58,294 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:58,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788357313] [2023-04-01 11:25:58,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:58,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:58,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:58,305 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:25:58,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 11:25:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:58,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-01 11:25:58,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 11:25:58,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:26:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 11:26:03,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:26:03,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797385679] [2023-04-01 11:26:03,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:26:03,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788357313] [2023-04-01 11:26:03,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788357313] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:26:03,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [251903481] [2023-04-01 11:26:03,581 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 11:26:03,581 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:26:03,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:26:03,581 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:26:03,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:26:03,620 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:26:04,658 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:26:04,660 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 11:26:04,665 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:26:04,668 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:26:07,138 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4868#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:26:07,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:26:07,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:26:07,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-04-01 11:26:07,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303010228] [2023-04-01 11:26:07,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:26:07,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 11:26:07,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:26:07,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 11:26:07,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 11:26:07,141 INFO L87 Difference]: Start difference. First operand 153 states and 169 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2023-04-01 11:26:13,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:26:13,417 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2023-04-01 11:26:13,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 11:26:13,417 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 64 [2023-04-01 11:26:13,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:26:13,418 INFO L225 Difference]: With dead ends: 188 [2023-04-01 11:26:13,418 INFO L226 Difference]: Without dead ends: 184 [2023-04-01 11:26:13,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 11:26:13,419 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 73 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 11:26:13,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 249 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 11:26:13,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-04-01 11:26:13,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 169. [2023-04-01 11:26:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 109 states have (on average 1.110091743119266) internal successors, (121), 113 states have internal predecessors, (121), 35 states have call successors, (35), 26 states have call predecessors, (35), 24 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2023-04-01 11:26:13,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 187 transitions. [2023-04-01 11:26:13,450 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 187 transitions. Word has length 64 [2023-04-01 11:26:13,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:26:13,451 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 187 transitions. [2023-04-01 11:26:13,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2023-04-01 11:26:13,451 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 187 transitions. [2023-04-01 11:26:13,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 11:26:13,452 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:26:13,452 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:26:13,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 11:26:13,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 11:26:13,652 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:26:13,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:26:13,653 INFO L85 PathProgramCache]: Analyzing trace with hash 870486121, now seen corresponding path program 1 times [2023-04-01 11:26:13,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:26:13,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670434014] [2023-04-01 11:26:13,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:26:13,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:26:13,658 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:26:13,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740795870] [2023-04-01 11:26:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:26:13,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:26:13,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:26:13,663 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:26:13,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 11:26:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:26:13,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 11:26:13,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:26:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-04-01 11:26:13,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:26:26,453 WARN L223 SmtUtils]: Spent 12.20s on a formula simplification. DAG size of input: 38 DAG size of output: 20 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 11:26:26,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:26:26,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670434014] [2023-04-01 11:26:26,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:26:26,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740795870] [2023-04-01 11:26:26,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740795870] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:26:26,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [967830080] [2023-04-01 11:26:26,495 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-01 11:26:26,495 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:26:26,495 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:26:26,496 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:26:26,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:26:26,523 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:26:27,583 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:26:27,585 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 11:26:27,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:26:27,593 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:26:30,259 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5710#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:26:30,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:26:30,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:26:30,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-04-01 11:26:30,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506339605] [2023-04-01 11:26:30,260 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 11:26:30,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 11:26:30,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:26:30,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 11:26:30,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 11:26:30,261 INFO L87 Difference]: Start difference. First operand 169 states and 187 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-04-01 11:26:30,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:26:30,746 INFO L93 Difference]: Finished difference Result 196 states and 225 transitions. [2023-04-01 11:26:30,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 11:26:30,746 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2023-04-01 11:26:30,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:26:30,747 INFO L225 Difference]: With dead ends: 196 [2023-04-01 11:26:30,747 INFO L226 Difference]: Without dead ends: 165 [2023-04-01 11:26:30,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 11:26:30,748 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 42 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:26:30,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 203 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 11:26:30,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-04-01 11:26:30,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 159. [2023-04-01 11:26:30,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 101 states have (on average 1.108910891089109) internal successors, (112), 106 states have internal predecessors, (112), 35 states have call successors, (35), 23 states have call predecessors, (35), 22 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2023-04-01 11:26:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 179 transitions. [2023-04-01 11:26:30,773 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 179 transitions. Word has length 75 [2023-04-01 11:26:30,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:26:30,773 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 179 transitions. [2023-04-01 11:26:30,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-04-01 11:26:30,773 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 179 transitions. [2023-04-01 11:26:30,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 11:26:30,774 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:26:30,774 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:26:30,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 11:26:30,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 11:26:30,979 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:26:30,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:26:30,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1334221355, now seen corresponding path program 2 times [2023-04-01 11:26:30,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:26:30,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893628528] [2023-04-01 11:26:30,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:26:30,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:26:30,987 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:26:30,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781480695] [2023-04-01 11:26:30,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:26:30,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:26:30,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:26:30,988 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:26:30,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 11:26:31,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 11:26:31,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:26:31,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 11:26:31,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:26:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 41 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-04-01 11:26:31,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:26:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2023-04-01 11:26:32,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:26:32,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893628528] [2023-04-01 11:26:32,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:26:32,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781480695] [2023-04-01 11:26:32,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781480695] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:26:32,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1218393285] [2023-04-01 11:26:32,055 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 11:26:32,055 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:26:32,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:26:32,055 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:26:32,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:26:32,079 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:26:33,054 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:26:33,056 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 11:26:33,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:26:33,063 INFO L180 IcfgInterpreter]: Interpretation finished