./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 11:42:41,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 11:42:41,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 11:42:41,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 11:42:41,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 11:42:41,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 11:42:41,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 11:42:41,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 11:42:41,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 11:42:41,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 11:42:41,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 11:42:41,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 11:42:41,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 11:42:41,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 11:42:41,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 11:42:41,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 11:42:41,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 11:42:41,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 11:42:41,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 11:42:41,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 11:42:41,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 11:42:41,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 11:42:41,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 11:42:41,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 11:42:41,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 11:42:41,260 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 11:42:41,260 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 11:42:41,261 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 11:42:41,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 11:42:41,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 11:42:41,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 11:42:41,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 11:42:41,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 11:42:41,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 11:42:41,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 11:42:41,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 11:42:41,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 11:42:41,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 11:42:41,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 11:42:41,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 11:42:41,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 11:42:41,268 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 11:42:41,284 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 11:42:41,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 11:42:41,284 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 11:42:41,285 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 11:42:41,285 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 11:42:41,285 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 11:42:41,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 11:42:41,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 11:42:41,286 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 11:42:41,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 11:42:41,287 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 11:42:41,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 11:42:41,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 11:42:41,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 11:42:41,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 11:42:41,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 11:42:41,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 11:42:41,288 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 11:42:41,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 11:42:41,288 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 11:42:41,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 11:42:41,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 11:42:41,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 11:42:41,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 11:42:41,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:42:41,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 11:42:41,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 11:42:41,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 11:42:41,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 11:42:41,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 11:42:41,290 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 11:42:41,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 11:42:41,291 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 11:42:41,291 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 11:42:41,291 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 11:42:41,291 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 [2023-02-15 11:42:41,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 11:42:41,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 11:42:41,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 11:42:41,505 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 11:42:41,505 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 11:42:41,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2023-02-15 11:42:42,610 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 11:42:42,787 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 11:42:42,788 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2023-02-15 11:42:42,794 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0965fc20/4636c81b71fc4f5d8ad127ae61eddc93/FLAGf19ca49f3 [2023-02-15 11:42:42,809 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0965fc20/4636c81b71fc4f5d8ad127ae61eddc93 [2023-02-15 11:42:42,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 11:42:42,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 11:42:42,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 11:42:42,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 11:42:42,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 11:42:42,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:42:42" (1/1) ... [2023-02-15 11:42:42,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65bbb841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:42, skipping insertion in model container [2023-02-15 11:42:42,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:42:42" (1/1) ... [2023-02-15 11:42:42,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 11:42:42,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 11:42:42,969 WARN L237 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/egcd2-ll_valuebound20.c[490,503] [2023-02-15 11:42:42,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:42:43,006 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 11:42:43,014 WARN L237 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/egcd2-ll_valuebound20.c[490,503] [2023-02-15 11:42:43,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:42:43,033 INFO L208 MainTranslator]: Completed translation [2023-02-15 11:42:43,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:43 WrapperNode [2023-02-15 11:42:43,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 11:42:43,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 11:42:43,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 11:42:43,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 11:42:43,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:43" (1/1) ... [2023-02-15 11:42:43,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:43" (1/1) ... [2023-02-15 11:42:43,059 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2023-02-15 11:42:43,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 11:42:43,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 11:42:43,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 11:42:43,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 11:42:43,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:43" (1/1) ... [2023-02-15 11:42:43,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:43" (1/1) ... [2023-02-15 11:42:43,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:43" (1/1) ... [2023-02-15 11:42:43,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:43" (1/1) ... [2023-02-15 11:42:43,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:43" (1/1) ... [2023-02-15 11:42:43,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:43" (1/1) ... [2023-02-15 11:42:43,076 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:43" (1/1) ... [2023-02-15 11:42:43,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:43" (1/1) ... [2023-02-15 11:42:43,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 11:42:43,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 11:42:43,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 11:42:43,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 11:42:43,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:43" (1/1) ... [2023-02-15 11:42:43,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:42:43,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:43,106 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) [2023-02-15 11:42:43,112 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 [2023-02-15 11:42:43,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 11:42:43,150 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 11:42:43,151 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 11:42:43,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 11:42:43,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 11:42:43,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 11:42:43,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 11:42:43,152 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 11:42:43,206 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 11:42:43,208 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 11:42:43,349 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 11:42:43,354 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 11:42:43,355 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 11:42:43,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:42:43 BoogieIcfgContainer [2023-02-15 11:42:43,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 11:42:43,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 11:42:43,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 11:42:43,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 11:42:43,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:42:42" (1/3) ... [2023-02-15 11:42:43,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7014fbbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:42:43, skipping insertion in model container [2023-02-15 11:42:43,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:43" (2/3) ... [2023-02-15 11:42:43,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7014fbbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:42:43, skipping insertion in model container [2023-02-15 11:42:43,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:42:43" (3/3) ... [2023-02-15 11:42:43,364 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.c [2023-02-15 11:42:43,379 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 11:42:43,379 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 11:42:43,433 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 11:42:43,440 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=PETRI_NET, 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;@79e74fd2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 11:42:43,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 11:42:43,444 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-15 11:42:43,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 11:42:43,451 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:43,452 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:42:43,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:43,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:43,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2023-02-15 11:42:43,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:43,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66637201] [2023-02-15 11:42:43,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:43,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:43,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:43,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66637201] [2023-02-15 11:42:43,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 11:42:43,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347763298] [2023-02-15 11:42:43,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:43,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:43,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:43,586 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) [2023-02-15 11:42:43,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 11:42:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:43,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 11:42:43,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-15 11:42:43,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:42:43,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347763298] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:42:43,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:42:43,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 11:42:43,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292120637] [2023-02-15 11:42:43,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:42:43,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 11:42:43,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:43,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 11:42:43,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:42:43,792 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 11:42:43,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:43,812 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2023-02-15 11:42:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 11:42:43,814 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2023-02-15 11:42:43,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:43,821 INFO L225 Difference]: With dead ends: 67 [2023-02-15 11:42:43,821 INFO L226 Difference]: Without dead ends: 31 [2023-02-15 11:42:43,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:42:43,827 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:42:43,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:42:43,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-15 11:42:43,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-15 11:42:43,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-15 11:42:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2023-02-15 11:42:43,861 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2023-02-15 11:42:43,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:43,861 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2023-02-15 11:42:43,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 11:42:43,862 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2023-02-15 11:42:43,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 11:42:43,863 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:43,863 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:42:43,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 11:42:44,069 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 [2023-02-15 11:42:44,070 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:44,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:44,070 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2023-02-15 11:42:44,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:44,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475762346] [2023-02-15 11:42:44,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:44,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:44,094 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:44,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501133603] [2023-02-15 11:42:44,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:44,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:44,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:44,097 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) [2023-02-15 11:42:44,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 11:42:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:44,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 11:42:44,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 11:42:44,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:42:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 11:42:44,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:44,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475762346] [2023-02-15 11:42:44,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:44,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501133603] [2023-02-15 11:42:44,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501133603] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:42:44,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:42:44,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-02-15 11:42:44,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419080434] [2023-02-15 11:42:44,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:42:44,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 11:42:44,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:44,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 11:42:44,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 11:42:44,369 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 11:42:44,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:44,477 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2023-02-15 11:42:44,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:42:44,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2023-02-15 11:42:44,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:44,482 INFO L225 Difference]: With dead ends: 48 [2023-02-15 11:42:44,482 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 11:42:44,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-15 11:42:44,484 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:42:44,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 88 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:42:44,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 11:42:44,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2023-02-15 11:42:44,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-15 11:42:44,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-02-15 11:42:44,509 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2023-02-15 11:42:44,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:44,510 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-02-15 11:42:44,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 11:42:44,511 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-02-15 11:42:44,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 11:42:44,514 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:44,514 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:42:44,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 11:42:44,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-15 11:42:44,721 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:44,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:44,722 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2023-02-15 11:42:44,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:44,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637514514] [2023-02-15 11:42:44,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:44,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:44,747 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:44,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [742465675] [2023-02-15 11:42:44,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:44,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:44,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:44,758 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) [2023-02-15 11:42:44,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 11:42:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:44,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 11:42:44,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 11:42:44,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:42:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-15 11:42:44,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:44,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637514514] [2023-02-15 11:42:44,995 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:44,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742465675] [2023-02-15 11:42:44,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742465675] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 11:42:44,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:42:44,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-02-15 11:42:44,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321790910] [2023-02-15 11:42:44,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:42:44,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 11:42:44,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:44,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 11:42:44,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-15 11:42:44,998 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 11:42:45,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:45,058 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-02-15 11:42:45,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:42:45,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2023-02-15 11:42:45,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:45,060 INFO L225 Difference]: With dead ends: 39 [2023-02-15 11:42:45,060 INFO L226 Difference]: Without dead ends: 37 [2023-02-15 11:42:45,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-15 11:42:45,064 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:42:45,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:42:45,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-15 11:42:45,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-15 11:42:45,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-15 11:42:45,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-02-15 11:42:45,081 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2023-02-15 11:42:45,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:45,082 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-02-15 11:42:45,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 11:42:45,082 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-02-15 11:42:45,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 11:42:45,083 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:45,083 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:42:45,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 11:42:45,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:45,289 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:45,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:45,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2023-02-15 11:42:45,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:45,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765460136] [2023-02-15 11:42:45,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:45,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:45,311 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:45,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335205289] [2023-02-15 11:42:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:45,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:45,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:45,316 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) [2023-02-15 11:42:45,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 11:42:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:45,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 11:42:45,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 11:42:45,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:42:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-15 11:42:45,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:45,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765460136] [2023-02-15 11:42:45,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:45,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335205289] [2023-02-15 11:42:45,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335205289] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 11:42:45,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:42:45,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-15 11:42:45,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467583595] [2023-02-15 11:42:45,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:42:45,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 11:42:45,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:45,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 11:42:45,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-15 11:42:45,664 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 11:42:45,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:45,722 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2023-02-15 11:42:45,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:42:45,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2023-02-15 11:42:45,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:45,727 INFO L225 Difference]: With dead ends: 50 [2023-02-15 11:42:45,727 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 11:42:45,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:42:45,732 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:42:45,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 141 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:42:45,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 11:42:45,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-02-15 11:42:45,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-15 11:42:45,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2023-02-15 11:42:45,764 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2023-02-15 11:42:45,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:45,765 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2023-02-15 11:42:45,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 11:42:45,766 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2023-02-15 11:42:45,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 11:42:45,766 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:45,767 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:42:45,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 11:42:45,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:45,973 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:45,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:45,973 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2023-02-15 11:42:45,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:45,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096191480] [2023-02-15 11:42:45,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:45,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:45,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:45,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961998155] [2023-02-15 11:42:46,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:46,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:46,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:46,009 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) [2023-02-15 11:42:46,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 11:42:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:46,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 11:42:46,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-15 11:42:46,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:42:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-15 11:42:46,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:46,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096191480] [2023-02-15 11:42:46,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:46,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961998155] [2023-02-15 11:42:46,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961998155] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 11:42:46,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:42:46,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-15 11:42:46,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958482395] [2023-02-15 11:42:46,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:42:46,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 11:42:46,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:46,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 11:42:46,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-15 11:42:46,367 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 11:42:46,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:46,427 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2023-02-15 11:42:46,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:42:46,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2023-02-15 11:42:46,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:46,429 INFO L225 Difference]: With dead ends: 54 [2023-02-15 11:42:46,429 INFO L226 Difference]: Without dead ends: 52 [2023-02-15 11:42:46,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:42:46,430 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:42:46,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:42:46,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-15 11:42:46,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-02-15 11:42:46,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-15 11:42:46,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-02-15 11:42:46,439 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2023-02-15 11:42:46,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:46,439 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-02-15 11:42:46,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 11:42:46,440 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-02-15 11:42:46,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 11:42:46,441 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:46,441 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1] [2023-02-15 11:42:46,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 11:42:46,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:46,647 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:46,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:46,647 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2023-02-15 11:42:46,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:46,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122195281] [2023-02-15 11:42:46,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:46,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:46,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:46,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377259146] [2023-02-15 11:42:46,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:46,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:46,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:46,666 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) [2023-02-15 11:42:46,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 11:42:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:46,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 11:42:46,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-15 11:42:46,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:42:47,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:47,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122195281] [2023-02-15 11:42:47,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:47,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377259146] [2023-02-15 11:42:47,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377259146] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:42:47,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:42:47,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-15 11:42:47,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402759470] [2023-02-15 11:42:47,045 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 11:42:47,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 11:42:47,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:47,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 11:42:47,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:42:47,047 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-15 11:42:47,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:47,232 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2023-02-15 11:42:47,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 11:42:47,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2023-02-15 11:42:47,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:47,233 INFO L225 Difference]: With dead ends: 60 [2023-02-15 11:42:47,234 INFO L226 Difference]: Without dead ends: 58 [2023-02-15 11:42:47,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-02-15 11:42:47,235 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:42:47,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 97 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:42:47,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-15 11:42:47,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2023-02-15 11:42:47,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-15 11:42:47,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2023-02-15 11:42:47,246 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2023-02-15 11:42:47,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:47,246 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2023-02-15 11:42:47,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-15 11:42:47,246 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2023-02-15 11:42:47,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-15 11:42:47,247 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:47,247 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:42:47,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 11:42:47,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:47,454 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:47,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:47,454 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2023-02-15 11:42:47,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:47,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457352282] [2023-02-15 11:42:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:47,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:47,475 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:47,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597066263] [2023-02-15 11:42:47,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:47,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:47,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:47,479 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) [2023-02-15 11:42:47,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 11:42:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:47,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 11:42:47,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-15 11:42:47,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:42:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-15 11:42:47,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:47,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457352282] [2023-02-15 11:42:47,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:47,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597066263] [2023-02-15 11:42:47,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597066263] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:42:47,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:42:47,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-15 11:42:47,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968994550] [2023-02-15 11:42:47,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:42:47,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 11:42:47,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:47,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 11:42:47,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 11:42:47,677 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-15 11:42:47,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:47,885 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2023-02-15 11:42:47,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 11:42:47,885 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2023-02-15 11:42:47,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:47,887 INFO L225 Difference]: With dead ends: 102 [2023-02-15 11:42:47,887 INFO L226 Difference]: Without dead ends: 94 [2023-02-15 11:42:47,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:42:47,888 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:42:47,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 231 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:42:47,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-15 11:42:47,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2023-02-15 11:42:47,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-15 11:42:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2023-02-15 11:42:47,918 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2023-02-15 11:42:47,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:47,919 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2023-02-15 11:42:47,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-15 11:42:47,919 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2023-02-15 11:42:47,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 11:42:47,920 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:47,921 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:42:47,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 11:42:48,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:48,128 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:48,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:48,128 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2023-02-15 11:42:48,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:48,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733170881] [2023-02-15 11:42:48,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:48,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:48,145 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:48,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746619612] [2023-02-15 11:42:48,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:48,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:48,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:48,147 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) [2023-02-15 11:42:48,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 11:42:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:48,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 11:42:48,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-15 11:42:48,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:42:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-02-15 11:42:48,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:48,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733170881] [2023-02-15 11:42:48,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:48,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746619612] [2023-02-15 11:42:48,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746619612] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:42:48,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:42:48,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2023-02-15 11:42:48,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342649683] [2023-02-15 11:42:48,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:42:48,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 11:42:48,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:48,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 11:42:48,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-02-15 11:42:48,516 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-15 11:42:48,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:48,928 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2023-02-15 11:42:48,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 11:42:48,929 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 71 [2023-02-15 11:42:48,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:48,931 INFO L225 Difference]: With dead ends: 128 [2023-02-15 11:42:48,931 INFO L226 Difference]: Without dead ends: 124 [2023-02-15 11:42:48,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-02-15 11:42:48,932 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 48 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:42:48,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 203 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 11:42:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-15 11:42:48,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2023-02-15 11:42:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-15 11:42:48,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2023-02-15 11:42:48,962 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2023-02-15 11:42:48,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:48,963 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2023-02-15 11:42:48,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-15 11:42:48,963 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2023-02-15 11:42:48,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-15 11:42:48,966 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:48,966 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:42:48,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 11:42:49,174 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,SelfDestructingSolverStorable7 [2023-02-15 11:42:49,174 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:49,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:49,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2023-02-15 11:42:49,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:49,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663850972] [2023-02-15 11:42:49,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:49,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:49,184 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:49,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975593518] [2023-02-15 11:42:49,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:42:49,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:49,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:49,186 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) [2023-02-15 11:42:49,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 11:42:49,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:42:49,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:42:49,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 11:42:49,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-02-15 11:42:49,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:42:58,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:58,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663850972] [2023-02-15 11:42:58,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:58,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975593518] [2023-02-15 11:42:58,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975593518] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:42:58,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:42:58,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-15 11:42:58,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468215867] [2023-02-15 11:42:58,105 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 11:42:58,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 11:42:58,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:58,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 11:42:58,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=146, Unknown=4, NotChecked=0, Total=182 [2023-02-15 11:42:58,107 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-15 11:43:00,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 11:43:02,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 11:43:02,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:43:02,411 INFO L93 Difference]: Finished difference Result 124 states and 165 transitions. [2023-02-15 11:43:02,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 11:43:02,412 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 76 [2023-02-15 11:43:02,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:43:02,413 INFO L225 Difference]: With dead ends: 124 [2023-02-15 11:43:02,414 INFO L226 Difference]: Without dead ends: 122 [2023-02-15 11:43:02,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=59, Invalid=243, Unknown=4, NotChecked=0, Total=306 [2023-02-15 11:43:02,416 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 22 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:43:02,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 176 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 279 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2023-02-15 11:43:02,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-15 11:43:02,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2023-02-15 11:43:02,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 68 states have internal predecessors, (77), 42 states have call successors, (42), 10 states have call predecessors, (42), 10 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2023-02-15 11:43:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2023-02-15 11:43:02,448 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 76 [2023-02-15 11:43:02,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:43:02,450 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2023-02-15 11:43:02,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-15 11:43:02,450 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2023-02-15 11:43:02,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-15 11:43:02,456 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:43:02,456 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1, 1, 1, 1] [2023-02-15 11:43:02,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 11:43:02,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:43:02,662 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:43:02,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:43:02,662 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2023-02-15 11:43:02,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:43:02,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352196228] [2023-02-15 11:43:02,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:43:02,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:43:02,676 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:43:02,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801141396] [2023-02-15 11:43:02,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:43:02,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:43:02,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:43:02,681 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) [2023-02-15 11:43:02,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 11:43:02,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 11:43:02,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:43:02,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-15 11:43:02,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:43:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 46 proven. 8 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-02-15 11:43:03,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:43:03,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:43:03,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352196228] [2023-02-15 11:43:03,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:43:03,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801141396] [2023-02-15 11:43:03,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801141396] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:43:03,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:43:03,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-15 11:43:03,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213939925] [2023-02-15 11:43:03,428 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 11:43:03,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 11:43:03,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:43:03,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 11:43:03,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-15 11:43:03,429 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-02-15 11:43:03,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:43:03,932 INFO L93 Difference]: Finished difference Result 128 states and 168 transitions. [2023-02-15 11:43:03,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 11:43:03,932 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2023-02-15 11:43:03,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:43:03,935 INFO L225 Difference]: With dead ends: 128 [2023-02-15 11:43:03,935 INFO L226 Difference]: Without dead ends: 126 [2023-02-15 11:43:03,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-02-15 11:43:03,936 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 11:43:03,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 153 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 11:43:03,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-15 11:43:03,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2023-02-15 11:43:03,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 71 states have internal predecessors, (80), 42 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2023-02-15 11:43:03,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2023-02-15 11:43:03,960 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 81 [2023-02-15 11:43:03,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:43:03,961 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2023-02-15 11:43:03,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-02-15 11:43:03,961 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2023-02-15 11:43:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-15 11:43:03,962 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:43:03,962 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:43:03,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 11:43:04,168 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,SelfDestructingSolverStorable9 [2023-02-15 11:43:04,169 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:43:04,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:43:04,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2023-02-15 11:43:04,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:43:04,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748062532] [2023-02-15 11:43:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:43:04,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:43:04,178 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:43:04,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128640148] [2023-02-15 11:43:04,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:43:04,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:43:04,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:43:04,179 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) [2023-02-15 11:43:04,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 11:43:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:43:04,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 11:43:04,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:43:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-02-15 11:43:04,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:43:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-02-15 11:43:05,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:43:05,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748062532] [2023-02-15 11:43:05,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:43:05,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128640148] [2023-02-15 11:43:05,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128640148] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:43:05,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:43:05,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-15 11:43:05,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728668941] [2023-02-15 11:43:05,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:43:05,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 11:43:05,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:43:05,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 11:43:05,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-02-15 11:43:05,426 INFO L87 Difference]: Start difference. First operand 123 states and 163 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-15 11:43:14,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:43:14,976 INFO L93 Difference]: Finished difference Result 208 states and 295 transitions. [2023-02-15 11:43:14,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 11:43:14,977 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 87 [2023-02-15 11:43:14,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:43:14,979 INFO L225 Difference]: With dead ends: 208 [2023-02-15 11:43:14,979 INFO L226 Difference]: Without dead ends: 204 [2023-02-15 11:43:14,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 11:43:14,980 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 87 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-02-15 11:43:14,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 485 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-02-15 11:43:14,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-02-15 11:43:15,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2023-02-15 11:43:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 107 states have internal predecessors, (127), 79 states have call successors, (79), 14 states have call predecessors, (79), 14 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-15 11:43:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 284 transitions. [2023-02-15 11:43:15,051 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 284 transitions. Word has length 87 [2023-02-15 11:43:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:43:15,051 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 284 transitions. [2023-02-15 11:43:15,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-15 11:43:15,052 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 284 transitions. [2023-02-15 11:43:15,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-15 11:43:15,053 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:43:15,053 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:43:15,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 11:43:15,259 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,SelfDestructingSolverStorable10 [2023-02-15 11:43:15,259 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:43:15,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:43:15,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1140726838, now seen corresponding path program 4 times [2023-02-15 11:43:15,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:43:15,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169698332] [2023-02-15 11:43:15,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:43:15,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:43:15,283 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:43:15,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559454041] [2023-02-15 11:43:15,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:43:15,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:43:15,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:43:15,290 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) [2023-02-15 11:43:15,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 11:43:15,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:43:15,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:43:15,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 11:43:15,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:43:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-15 11:43:15,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:43:15,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:43:15,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169698332] [2023-02-15 11:43:15,382 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:43:15,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559454041] [2023-02-15 11:43:15,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559454041] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:43:15,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:43:15,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 11:43:15,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686006826] [2023-02-15 11:43:15,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:43:15,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 11:43:15,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:43:15,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 11:43:15,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 11:43:15,384 INFO L87 Difference]: Start difference. First operand 200 states and 284 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-02-15 11:43:15,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:43:15,487 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2023-02-15 11:43:15,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:43:15,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 101 [2023-02-15 11:43:15,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:43:15,489 INFO L225 Difference]: With dead ends: 253 [2023-02-15 11:43:15,489 INFO L226 Difference]: Without dead ends: 181 [2023-02-15 11:43:15,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 11:43:15,494 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:43:15,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 145 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:43:15,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-15 11:43:15,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 167. [2023-02-15 11:43:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 89 states have (on average 1.146067415730337) internal successors, (102), 90 states have internal predecessors, (102), 63 states have call successors, (63), 14 states have call predecessors, (63), 14 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-02-15 11:43:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 227 transitions. [2023-02-15 11:43:15,550 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 227 transitions. Word has length 101 [2023-02-15 11:43:15,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:43:15,551 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 227 transitions. [2023-02-15 11:43:15,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-02-15 11:43:15,552 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 227 transitions. [2023-02-15 11:43:15,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-15 11:43:15,554 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:43:15,554 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:43:15,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 11:43:15,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 11:43:15,759 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:43:15,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:43:15,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2023-02-15 11:43:15,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:43:15,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573872192] [2023-02-15 11:43:15,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:43:15,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:43:15,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:43:15,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560363244] [2023-02-15 11:43:15,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:43:15,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:43:15,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:43:15,770 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:43:15,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 11:43:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:43:15,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-15 11:43:15,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:43:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 57 proven. 28 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-02-15 11:43:16,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:43:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-02-15 11:43:17,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:43:17,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573872192] [2023-02-15 11:43:17,721 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:43:17,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560363244] [2023-02-15 11:43:17,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560363244] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:43:17,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:43:17,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-02-15 11:43:17,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916783558] [2023-02-15 11:43:17,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:43:17,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 11:43:17,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:43:17,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 11:43:17,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-02-15 11:43:17,723 INFO L87 Difference]: Start difference. First operand 167 states and 227 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-15 11:43:25,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:43:32,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:43:34,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:43:42,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:43:44,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:43:44,576 INFO L93 Difference]: Finished difference Result 209 states and 287 transitions. [2023-02-15 11:43:44,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 11:43:44,577 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 103 [2023-02-15 11:43:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:43:44,579 INFO L225 Difference]: With dead ends: 209 [2023-02-15 11:43:44,579 INFO L226 Difference]: Without dead ends: 207 [2023-02-15 11:43:44,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 11:43:44,580 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 93 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 132 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2023-02-15 11:43:44,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 199 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1093 Invalid, 3 Unknown, 0 Unchecked, 15.7s Time] [2023-02-15 11:43:44,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-02-15 11:43:44,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 197. [2023-02-15 11:43:44,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 108 states have internal predecessors, (121), 75 states have call successors, (75), 15 states have call predecessors, (75), 15 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2023-02-15 11:43:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 270 transitions. [2023-02-15 11:43:44,635 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 270 transitions. Word has length 103 [2023-02-15 11:43:44,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:43:44,636 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 270 transitions. [2023-02-15 11:43:44,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-15 11:43:44,636 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 270 transitions. [2023-02-15 11:43:44,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-15 11:43:44,637 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:43:44,638 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:43:44,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 11:43:44,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 11:43:44,843 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:43:44,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:43:44,844 INFO L85 PathProgramCache]: Analyzing trace with hash -349873392, now seen corresponding path program 2 times [2023-02-15 11:43:44,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:43:44,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95354768] [2023-02-15 11:43:44,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:43:44,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:43:44,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:43:44,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281497054] [2023-02-15 11:43:44,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:43:44,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:43:44,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:43:44,853 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:43:44,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 11:43:44,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:43:44,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:43:44,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-15 11:43:44,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:43:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 51 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-02-15 11:43:45,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:43:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 57 proven. 42 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-02-15 11:43:46,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:43:46,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95354768] [2023-02-15 11:43:46,337 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:43:46,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281497054] [2023-02-15 11:43:46,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281497054] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:43:46,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:43:46,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2023-02-15 11:43:46,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557728742] [2023-02-15 11:43:46,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:43:46,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 11:43:46,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:43:46,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 11:43:46,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-02-15 11:43:46,340 INFO L87 Difference]: Start difference. First operand 197 states and 270 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2023-02-15 11:44:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:44:06,705 INFO L93 Difference]: Finished difference Result 278 states and 390 transitions. [2023-02-15 11:44:06,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 11:44:06,705 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) Word has length 120 [2023-02-15 11:44:06,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:44:06,707 INFO L225 Difference]: With dead ends: 278 [2023-02-15 11:44:06,707 INFO L226 Difference]: Without dead ends: 276 [2023-02-15 11:44:06,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=459, Invalid=2091, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 11:44:06,709 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 103 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:44:06,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 218 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2023-02-15 11:44:06,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-02-15 11:44:06,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 244. [2023-02-15 11:44:06,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 132 states have (on average 1.1515151515151516) internal successors, (152), 136 states have internal predecessors, (152), 93 states have call successors, (93), 18 states have call predecessors, (93), 18 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2023-02-15 11:44:06,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 337 transitions. [2023-02-15 11:44:06,814 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 337 transitions. Word has length 120 [2023-02-15 11:44:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:44:06,815 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 337 transitions. [2023-02-15 11:44:06,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2023-02-15 11:44:06,815 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 337 transitions. [2023-02-15 11:44:06,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-15 11:44:06,816 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:44:06,816 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:44:06,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 11:44:07,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:44:07,022 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:44:07,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:44:07,023 INFO L85 PathProgramCache]: Analyzing trace with hash -397785577, now seen corresponding path program 3 times [2023-02-15 11:44:07,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:44:07,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698956055] [2023-02-15 11:44:07,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:44:07,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:44:07,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:44:07,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805629068] [2023-02-15 11:44:07,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:44:07,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:44:07,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:44:07,033 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:44:07,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 11:44:07,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 11:44:07,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:44:07,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-15 11:44:07,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:44:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 81 proven. 38 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-02-15 11:44:07,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:44:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 67 proven. 29 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2023-02-15 11:44:07,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:44:07,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698956055] [2023-02-15 11:44:07,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:44:07,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805629068] [2023-02-15 11:44:07,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805629068] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:44:07,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:44:07,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2023-02-15 11:44:07,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091967809] [2023-02-15 11:44:07,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:44:07,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 11:44:07,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:44:07,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 11:44:07,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2023-02-15 11:44:07,928 INFO L87 Difference]: Start difference. First operand 244 states and 337 transitions. Second operand has 22 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (32), 11 states have call predecessors, (32), 9 states have call successors, (32) [2023-02-15 11:44:09,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:44:09,418 INFO L93 Difference]: Finished difference Result 283 states and 394 transitions. [2023-02-15 11:44:09,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 11:44:09,419 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (32), 11 states have call predecessors, (32), 9 states have call successors, (32) Word has length 123 [2023-02-15 11:44:09,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:44:09,421 INFO L225 Difference]: With dead ends: 283 [2023-02-15 11:44:09,422 INFO L226 Difference]: Without dead ends: 281 [2023-02-15 11:44:09,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 11:44:09,423 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 50 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:44:09,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 248 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-15 11:44:09,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-02-15 11:44:09,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 248. [2023-02-15 11:44:09,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 139 states have internal predecessors, (155), 93 states have call successors, (93), 19 states have call predecessors, (93), 19 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2023-02-15 11:44:09,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 340 transitions. [2023-02-15 11:44:09,555 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 340 transitions. Word has length 123 [2023-02-15 11:44:09,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:44:09,556 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 340 transitions. [2023-02-15 11:44:09,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (32), 11 states have call predecessors, (32), 9 states have call successors, (32) [2023-02-15 11:44:09,556 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 340 transitions. [2023-02-15 11:44:09,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-15 11:44:09,558 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:44:09,558 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:44:09,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 11:44:09,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 11:44:09,760 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:44:09,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:44:09,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2023-02-15 11:44:09,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:44:09,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732330045] [2023-02-15 11:44:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:44:09,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:44:09,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:44:09,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772669212] [2023-02-15 11:44:09,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:44:09,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:44:09,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:44:09,773 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:44:09,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 11:44:09,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:44:09,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:44:09,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 81 conjunts are in the unsatisfiable core [2023-02-15 11:44:09,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:44:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 113 proven. 94 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2023-02-15 11:44:10,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:44:12,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:44:12,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732330045] [2023-02-15 11:44:12,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:44:12,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772669212] [2023-02-15 11:44:12,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772669212] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:44:12,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:44:12,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-15 11:44:12,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666712938] [2023-02-15 11:44:12,111 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 11:44:12,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 11:44:12,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:44:12,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 11:44:12,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2023-02-15 11:44:12,112 INFO L87 Difference]: Start difference. First operand 248 states and 340 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-15 11:44:13,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:44:13,305 INFO L93 Difference]: Finished difference Result 304 states and 411 transitions. [2023-02-15 11:44:13,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 11:44:13,306 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 134 [2023-02-15 11:44:13,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:44:13,307 INFO L225 Difference]: With dead ends: 304 [2023-02-15 11:44:13,308 INFO L226 Difference]: Without dead ends: 297 [2023-02-15 11:44:13,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 11:44:13,309 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 50 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 11:44:13,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 238 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 11:44:13,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-02-15 11:44:13,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 291. [2023-02-15 11:44:13,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 158 states have (on average 1.1455696202531647) internal successors, (181), 162 states have internal predecessors, (181), 109 states have call successors, (109), 23 states have call predecessors, (109), 23 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2023-02-15 11:44:13,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 398 transitions. [2023-02-15 11:44:13,429 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 398 transitions. Word has length 134 [2023-02-15 11:44:13,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:44:13,429 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 398 transitions. [2023-02-15 11:44:13,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-15 11:44:13,429 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 398 transitions. [2023-02-15 11:44:13,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-15 11:44:13,431 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:44:13,432 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:44:13,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-15 11:44:13,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-15 11:44:13,637 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:44:13,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:44:13,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1798457687, now seen corresponding path program 4 times [2023-02-15 11:44:13,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:44:13,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450469417] [2023-02-15 11:44:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:44:13,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:44:13,646 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:44:13,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178618228] [2023-02-15 11:44:13,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:44:13,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:44:13,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:44:13,647 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:44:13,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 11:44:13,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:44:13,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:44:13,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 94 conjunts are in the unsatisfiable core [2023-02-15 11:44:13,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:44:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 165 proven. 161 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2023-02-15 11:44:14,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:45:22,980 WARN L233 SmtUtils]: Spent 8.37s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 11:45:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 190 proven. 91 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2023-02-15 11:45:31,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:45:31,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450469417] [2023-02-15 11:45:31,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:45:31,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178618228] [2023-02-15 11:45:31,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178618228] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:45:31,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:45:31,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2023-02-15 11:45:31,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748819002] [2023-02-15 11:45:31,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:45:31,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 11:45:31,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:45:31,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 11:45:31,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=795, Unknown=7, NotChecked=0, Total=992 [2023-02-15 11:45:31,345 INFO L87 Difference]: Start difference. First operand 291 states and 398 transitions. Second operand has 32 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 25 states have internal predecessors, (58), 14 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (48), 17 states have call predecessors, (48), 13 states have call successors, (48) [2023-02-15 11:45:33,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:45:37,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:45:39,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:45:42,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:45:44,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:45:45,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:45:46,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:45:49,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:45:51,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:45:53,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:45:55,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:45:57,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:45:59,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:46:02,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:46:06,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:46:08,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:46:11,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:46:14,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:46:15,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:46:16,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:46:20,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []