./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard2.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/hard2.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 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 11:21:00,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 11:21:00,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 11:21:00,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 11:21:00,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 11:21:00,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 11:21:00,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 11:21:00,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 11:21:00,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 11:21:00,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 11:21:00,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 11:21:00,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 11:21:00,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 11:21:00,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 11:21:00,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 11:21:00,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 11:21:00,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 11:21:00,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 11:21:00,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 11:21:00,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 11:21:00,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 11:21:00,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 11:21:00,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 11:21:00,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 11:21:00,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 11:21:00,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 11:21:00,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 11:21:00,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 11:21:00,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 11:21:00,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 11:21:00,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 11:21:00,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 11:21:00,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 11:21:00,319 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 11:21:00,321 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 11:21:00,321 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 11:21:00,321 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 11:21:00,321 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 11:21:00,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 11:21:00,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 11:21:00,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 11:21:00,323 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 11:21:00,346 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 11:21:00,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 11:21:00,346 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 11:21:00,347 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 11:21:00,347 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 11:21:00,347 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 11:21:00,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 11:21:00,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 11:21:00,348 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 11:21:00,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 11:21:00,348 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 11:21:00,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 11:21:00,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 11:21:00,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 11:21:00,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 11:21:00,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 11:21:00,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 11:21:00,349 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 11:21:00,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 11:21:00,349 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 11:21:00,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 11:21:00,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 11:21:00,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 11:21:00,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 11:21:00,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:21:00,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 11:21:00,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 11:21:00,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 11:21:00,350 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 11:21:00,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 11:21:00,351 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 11:21:00,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 11:21:00,351 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 11:21:00,351 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 11:21:00,351 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 11:21:00,351 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 [2023-02-15 11:21:00,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 11:21:00,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 11:21:00,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 11:21:00,537 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 11:21:00,537 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 11:21:00,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/hard2.c [2023-02-15 11:21:01,451 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 11:21:01,669 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 11:21:01,670 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard2.c [2023-02-15 11:21:01,675 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fa4df81a/66485e08c4ca4032b4d974abc2ee588d/FLAGc669fa654 [2023-02-15 11:21:01,701 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fa4df81a/66485e08c4ca4032b4d974abc2ee588d [2023-02-15 11:21:01,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 11:21:01,706 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 11:21:01,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 11:21:01,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 11:21:01,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 11:21:01,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:21:01" (1/1) ... [2023-02-15 11:21:01,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aeddbed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:21:01, skipping insertion in model container [2023-02-15 11:21:01,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:21:01" (1/1) ... [2023-02-15 11:21:01,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 11:21:01,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 11:21:01,810 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/hard2.c[526,539] [2023-02-15 11:21:01,819 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:21:01,824 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 11:21:01,832 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/hard2.c[526,539] [2023-02-15 11:21:01,835 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:21:01,842 INFO L208 MainTranslator]: Completed translation [2023-02-15 11:21:01,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:21:01 WrapperNode [2023-02-15 11:21:01,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 11:21:01,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 11:21:01,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 11:21:01,844 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 11:21:01,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:21:01" (1/1) ... [2023-02-15 11:21:01,852 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:21:01" (1/1) ... [2023-02-15 11:21:01,862 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2023-02-15 11:21:01,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 11:21:01,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 11:21:01,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 11:21:01,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 11:21:01,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:21:01" (1/1) ... [2023-02-15 11:21:01,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:21:01" (1/1) ... [2023-02-15 11:21:01,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:21:01" (1/1) ... [2023-02-15 11:21:01,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:21:01" (1/1) ... [2023-02-15 11:21:01,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:21:01" (1/1) ... [2023-02-15 11:21:01,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:21:01" (1/1) ... [2023-02-15 11:21:01,874 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:21:01" (1/1) ... [2023-02-15 11:21:01,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:21:01" (1/1) ... [2023-02-15 11:21:01,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 11:21:01,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 11:21:01,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 11:21:01,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 11:21:01,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:21:01" (1/1) ... [2023-02-15 11:21:01,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:21:01,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:21:01,901 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 11:21:01,910 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 11:21:01,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 11:21:01,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 11:21:01,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 11:21:01,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 11:21:01,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 11:21:01,934 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 11:21:01,979 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 11:21:01,980 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 11:21:02,081 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 11:21:02,085 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 11:21:02,085 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 11:21:02,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:21:02 BoogieIcfgContainer [2023-02-15 11:21:02,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 11:21:02,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 11:21:02,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 11:21:02,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 11:21:02,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:21:01" (1/3) ... [2023-02-15 11:21:02,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57de6974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:21:02, skipping insertion in model container [2023-02-15 11:21:02,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:21:01" (2/3) ... [2023-02-15 11:21:02,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57de6974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:21:02, skipping insertion in model container [2023-02-15 11:21:02,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:21:02" (3/3) ... [2023-02-15 11:21:02,091 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2.c [2023-02-15 11:21:02,102 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 11:21:02,102 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 11:21:02,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 11:21:02,143 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;@3f3be117, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 11:21:02,144 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 11:21:02,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 11:21:02,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 11:21:02,171 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:21:02,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:21:02,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:21:02,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:21:02,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1812186719, now seen corresponding path program 1 times [2023-02-15 11:21:02,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:21:02,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499128806] [2023-02-15 11:21:02,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:21:02,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:21:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:21:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:21:02,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:21:02,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499128806] [2023-02-15 11:21:02,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499128806] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:21:02,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:21:02,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 11:21:02,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294652203] [2023-02-15 11:21:02,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:21:02,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 11:21:02,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:21:02,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 11:21:02,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 11:21:02,459 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:21:02,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:21:02,524 INFO L93 Difference]: Finished difference Result 61 states and 105 transitions. [2023-02-15 11:21:02,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:21:02,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-15 11:21:02,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:21:02,538 INFO L225 Difference]: With dead ends: 61 [2023-02-15 11:21:02,538 INFO L226 Difference]: Without dead ends: 31 [2023-02-15 11:21:02,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 11:21:02,547 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:21:02,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 104 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:21:02,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-15 11:21:02,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2023-02-15 11:21:02,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 11:21:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-02-15 11:21:02,580 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 7 [2023-02-15 11:21:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:21:02,580 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-02-15 11:21:02,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:21:02,581 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-02-15 11:21:02,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 11:21:02,581 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:21:02,581 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:21:02,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 11:21:02,582 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:21:02,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:21:02,583 INFO L85 PathProgramCache]: Analyzing trace with hash 876512919, now seen corresponding path program 1 times [2023-02-15 11:21:02,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:21:02,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847025154] [2023-02-15 11:21:02,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:21:02,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:21:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:21:02,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 11:21:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:21:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:21:02,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:21:02,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847025154] [2023-02-15 11:21:02,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847025154] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:21:02,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:21:02,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 11:21:02,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072845625] [2023-02-15 11:21:02,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:21:02,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 11:21:02,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:21:02,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 11:21:02,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 11:21:02,695 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 11:21:02,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:21:02,729 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2023-02-15 11:21:02,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:21:02,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-02-15 11:21:02,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:21:02,730 INFO L225 Difference]: With dead ends: 37 [2023-02-15 11:21:02,731 INFO L226 Difference]: Without dead ends: 35 [2023-02-15 11:21:02,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 11:21:02,732 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:21:02,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 81 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:21:02,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-15 11:21:02,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2023-02-15 11:21:02,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 11:21:02,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-02-15 11:21:02,737 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 12 [2023-02-15 11:21:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:21:02,738 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-02-15 11:21:02,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 11:21:02,738 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-02-15 11:21:02,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 11:21:02,738 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:21:02,739 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:21:02,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 11:21:02,739 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:21:02,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:21:02,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2107096801, now seen corresponding path program 1 times [2023-02-15 11:21:02,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:21:02,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945706379] [2023-02-15 11:21:02,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:21:02,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:21:02,749 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:21:02,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191462178] [2023-02-15 11:21:02,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:21:02,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:21:02,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:21:02,752 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 11:21:02,753 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 11:21:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:21:02,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 11:21:02,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:21:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 11:21:02,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:21:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 11:21:03,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:21:03,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945706379] [2023-02-15 11:21:03,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:21:03,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191462178] [2023-02-15 11:21:03,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191462178] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:21:03,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:21:03,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-15 11:21:03,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275883467] [2023-02-15 11:21:03,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:21:03,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 11:21:03,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:21:03,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 11:21:03,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-15 11:21:03,135 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 11:21:03,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:21:03,449 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2023-02-15 11:21:03,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 11:21:03,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 17 [2023-02-15 11:21:03,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:21:03,452 INFO L225 Difference]: With dead ends: 63 [2023-02-15 11:21:03,452 INFO L226 Difference]: Without dead ends: 49 [2023-02-15 11:21:03,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:21:03,453 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:21:03,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 49 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 11:21:03,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-15 11:21:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-02-15 11:21:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 31 states have internal predecessors, (33), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 11:21:03,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2023-02-15 11:21:03,461 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 17 [2023-02-15 11:21:03,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:21:03,462 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2023-02-15 11:21:03,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 11:21:03,462 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2023-02-15 11:21:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 11:21:03,462 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:21:03,463 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:21:03,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 11:21:03,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:21:03,664 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:21:03,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:21:03,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2032872060, now seen corresponding path program 1 times [2023-02-15 11:21:03,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:21:03,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421220708] [2023-02-15 11:21:03,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:21:03,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:21:03,672 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:21:03,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478344649] [2023-02-15 11:21:03,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:21:03,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:21:03,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:21:03,674 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 11:21:03,676 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 11:21:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:21:03,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 11:21:03,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:21:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 11:21:03,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:21:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 11:21:03,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:21:03,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421220708] [2023-02-15 11:21:03,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:21:03,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478344649] [2023-02-15 11:21:03,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478344649] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:21:03,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:21:03,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-02-15 11:21:03,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344433454] [2023-02-15 11:21:03,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:21:03,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 11:21:03,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:21:03,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 11:21:03,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-15 11:21:03,913 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 11:21:04,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:21:04,028 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2023-02-15 11:21:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 11:21:04,029 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 24 [2023-02-15 11:21:04,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:21:04,029 INFO L225 Difference]: With dead ends: 64 [2023-02-15 11:21:04,030 INFO L226 Difference]: Without dead ends: 57 [2023-02-15 11:21:04,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-02-15 11:21:04,031 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:21:04,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 58 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:21:04,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-15 11:21:04,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-02-15 11:21:04,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 37 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-15 11:21:04,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2023-02-15 11:21:04,039 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 24 [2023-02-15 11:21:04,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:21:04,039 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2023-02-15 11:21:04,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 11:21:04,040 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2023-02-15 11:21:04,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 11:21:04,041 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:21:04,041 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:21:04,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 11:21:04,246 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,SelfDestructingSolverStorable3 [2023-02-15 11:21:04,247 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:21:04,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:21:04,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1409666923, now seen corresponding path program 1 times [2023-02-15 11:21:04,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:21:04,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479228945] [2023-02-15 11:21:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:21:04,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:21:04,255 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:21:04,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47523262] [2023-02-15 11:21:04,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:21:04,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:21:04,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:21:04,256 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 11:21:04,286 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 11:21:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:21:04,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-15 11:21:04,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:21:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-15 11:21:04,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:21:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-15 11:21:05,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:21:05,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479228945] [2023-02-15 11:21:05,118 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:21:05,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47523262] [2023-02-15 11:21:05,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47523262] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:21:05,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:21:05,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-02-15 11:21:05,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826519607] [2023-02-15 11:21:05,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:21:05,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 11:21:05,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:21:05,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 11:21:05,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-02-15 11:21:05,121 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-02-15 11:21:07,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:21:07,645 INFO L93 Difference]: Finished difference Result 140 states and 191 transitions. [2023-02-15 11:21:07,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 11:21:07,646 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 54 [2023-02-15 11:21:07,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:21:07,647 INFO L225 Difference]: With dead ends: 140 [2023-02-15 11:21:07,647 INFO L226 Difference]: Without dead ends: 109 [2023-02-15 11:21:07,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-02-15 11:21:07,648 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 53 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 11:21:07,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 81 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 11:21:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-15 11:21:07,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2023-02-15 11:21:07,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 69 states have internal predecessors, (75), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (30), 24 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-15 11:21:07,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 136 transitions. [2023-02-15 11:21:07,669 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 136 transitions. Word has length 54 [2023-02-15 11:21:07,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:21:07,670 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 136 transitions. [2023-02-15 11:21:07,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-02-15 11:21:07,670 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 136 transitions. [2023-02-15 11:21:07,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-15 11:21:07,671 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:21:07,671 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:21:07,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 11:21:07,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:21:07,878 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:21:07,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:21:07,879 INFO L85 PathProgramCache]: Analyzing trace with hash 135028242, now seen corresponding path program 1 times [2023-02-15 11:21:07,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:21:07,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826183312] [2023-02-15 11:21:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:21:07,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:21:07,898 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:21:07,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103137911] [2023-02-15 11:21:07,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:21:07,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:21:07,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:21:07,906 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 11:21:07,936 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 11:21:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:21:07,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 11:21:07,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:21:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-15 11:21:08,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:21:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-15 11:21:08,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:21:08,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826183312] [2023-02-15 11:21:08,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:21:08,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103137911] [2023-02-15 11:21:08,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103137911] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:21:08,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:21:08,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-02-15 11:21:08,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952984937] [2023-02-15 11:21:08,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:21:08,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 11:21:08,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:21:08,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 11:21:08,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-02-15 11:21:08,441 INFO L87 Difference]: Start difference. First operand 104 states and 136 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-15 11:21:10,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:21:12,441 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 11:21:12,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:21:12,496 INFO L93 Difference]: Finished difference Result 159 states and 208 transitions. [2023-02-15 11:21:12,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 11:21:12,496 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 65 [2023-02-15 11:21:12,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:21:12,497 INFO L225 Difference]: With dead ends: 159 [2023-02-15 11:21:12,497 INFO L226 Difference]: Without dead ends: 121 [2023-02-15 11:21:12,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-02-15 11:21:12,498 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-02-15 11:21:12,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 78 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 407 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2023-02-15 11:21:12,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-15 11:21:12,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2023-02-15 11:21:12,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.1666666666666667) internal successors, (70), 64 states have internal predecessors, (70), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-02-15 11:21:12,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2023-02-15 11:21:12,514 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 65 [2023-02-15 11:21:12,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:21:12,515 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2023-02-15 11:21:12,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-15 11:21:12,515 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2023-02-15 11:21:12,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-15 11:21:12,516 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:21:12,516 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:21:12,533 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 11:21:12,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:21:12,721 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:21:12,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:21:12,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1157546620, now seen corresponding path program 1 times [2023-02-15 11:21:12,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:21:12,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069106125] [2023-02-15 11:21:12,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:21:12,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:21:12,727 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:21:12,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936228826] [2023-02-15 11:21:12,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:21:12,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:21:12,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:21:12,744 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 11:21:12,745 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 11:21:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:21:12,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-15 11:21:12,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:21:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-15 11:21:12,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:21:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-15 11:21:13,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:21:13,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069106125] [2023-02-15 11:21:13,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:21:13,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936228826] [2023-02-15 11:21:13,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936228826] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:21:13,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:21:13,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-02-15 11:21:13,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466703898] [2023-02-15 11:21:13,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:21:13,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 11:21:13,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:21:13,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 11:21:13,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-02-15 11:21:13,212 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-15 11:21:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:21:13,501 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2023-02-15 11:21:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 11:21:13,502 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 70 [2023-02-15 11:21:13,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:21:13,503 INFO L225 Difference]: With dead ends: 115 [2023-02-15 11:21:13,503 INFO L226 Difference]: Without dead ends: 84 [2023-02-15 11:21:13,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-02-15 11:21:13,503 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:21:13,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 107 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:21:13,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-15 11:21:13,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-02-15 11:21:13,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 55 states have internal predecessors, (58), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-15 11:21:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2023-02-15 11:21:13,520 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 70 [2023-02-15 11:21:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:21:13,521 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2023-02-15 11:21:13,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-15 11:21:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2023-02-15 11:21:13,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-15 11:21:13,527 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:21:13,527 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-15 11:21:13,547 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 11:21:13,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:21:13,732 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:21:13,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:21:13,733 INFO L85 PathProgramCache]: Analyzing trace with hash 2022890084, now seen corresponding path program 2 times [2023-02-15 11:21:13,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:21:13,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580651628] [2023-02-15 11:21:13,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:21:13,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:21:13,739 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:21:13,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049195844] [2023-02-15 11:21:13,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:21:13,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:21:13,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:21:13,740 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 11:21:13,742 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 11:21:13,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:21:13,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:21:13,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 11:21:13,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:21:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-15 11:21:14,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:21:38,160 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-15 11:21:38,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:21:38,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580651628] [2023-02-15 11:21:38,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:21:38,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049195844] [2023-02-15 11:21:38,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049195844] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:21:38,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:21:38,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-02-15 11:21:38,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649690749] [2023-02-15 11:21:38,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:21:38,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 11:21:38,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:21:38,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 11:21:38,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-02-15 11:21:38,162 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 23 states have internal predecessors, (42), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2023-02-15 11:21:41,126 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 11:21:45,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:21:56,200 WARN L233 SmtUtils]: Spent 10.91s on a formula simplification. DAG size of input: 181 DAG size of output: 114 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 11:22:16,096 WARN L233 SmtUtils]: Spent 14.51s on a formula simplification. DAG size of input: 87 DAG size of output: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 11:22:24,036 WARN L233 SmtUtils]: Spent 7.52s on a formula simplification. DAG size of input: 122 DAG size of output: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 11:22:27,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:22:27,570 INFO L93 Difference]: Finished difference Result 186 states and 242 transitions. [2023-02-15 11:22:27,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 11:22:27,571 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 23 states have internal predecessors, (42), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) Word has length 84 [2023-02-15 11:22:27,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:22:27,573 INFO L225 Difference]: With dead ends: 186 [2023-02-15 11:22:27,573 INFO L226 Difference]: Without dead ends: 159 [2023-02-15 11:22:27,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=334, Invalid=1306, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 11:22:27,574 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 79 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 192 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:22:27,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 168 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 895 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2023-02-15 11:22:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-02-15 11:22:27,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 147. [2023-02-15 11:22:27,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 91 states have (on average 1.164835164835165) internal successors, (106), 96 states have internal predecessors, (106), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (39), 35 states have call predecessors, (39), 39 states have call successors, (39) [2023-02-15 11:22:27,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 185 transitions. [2023-02-15 11:22:27,622 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 185 transitions. Word has length 84 [2023-02-15 11:22:27,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:22:27,623 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 185 transitions. [2023-02-15 11:22:27,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 23 states have internal predecessors, (42), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2023-02-15 11:22:27,623 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 185 transitions. [2023-02-15 11:22:27,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-02-15 11:22:27,625 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:22:27,625 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-15 11:22:27,630 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 11:22:27,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:22:27,831 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:22:27,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:22:27,831 INFO L85 PathProgramCache]: Analyzing trace with hash -757369614, now seen corresponding path program 3 times [2023-02-15 11:22:27,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:22:27,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055549816] [2023-02-15 11:22:27,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:22:27,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:22:27,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:22:27,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642253471] [2023-02-15 11:22:27,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:22:27,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:22:27,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:22:27,838 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 11:22:27,840 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 11:22:27,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 11:22:27,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:22:27,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 11:22:27,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:22:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 79 proven. 39 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-02-15 11:22:28,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:22:30,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:22:30,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055549816] [2023-02-15 11:22:30,685 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:22:30,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642253471] [2023-02-15 11:22:30,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642253471] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:22:30,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:22:30,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-02-15 11:22:30,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999941552] [2023-02-15 11:22:30,686 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 11:22:30,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 11:22:30,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:22:30,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 11:22:30,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-15 11:22:30,687 INFO L87 Difference]: Start difference. First operand 147 states and 185 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-15 11:22:30,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:22:30,826 INFO L93 Difference]: Finished difference Result 161 states and 196 transitions. [2023-02-15 11:22:30,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 11:22:30,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 89 [2023-02-15 11:22:30,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:22:30,830 INFO L225 Difference]: With dead ends: 161 [2023-02-15 11:22:30,830 INFO L226 Difference]: Without dead ends: 159 [2023-02-15 11:22:30,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-02-15 11:22:30,834 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:22:30,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 55 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:22:30,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-02-15 11:22:30,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2023-02-15 11:22:30,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 100 states have (on average 1.15) internal successors, (115), 105 states have internal predecessors, (115), 40 states have call successors, (40), 18 states have call predecessors, (40), 18 states have return successors, (39), 35 states have call predecessors, (39), 39 states have call successors, (39) [2023-02-15 11:22:30,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 194 transitions. [2023-02-15 11:22:30,873 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 194 transitions. Word has length 89 [2023-02-15 11:22:30,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:22:30,874 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 194 transitions. [2023-02-15 11:22:30,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-15 11:22:30,874 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 194 transitions. [2023-02-15 11:22:30,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-15 11:22:30,877 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:22:30,878 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:22:30,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 11:22:31,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:22:31,082 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:22:31,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:22:31,083 INFO L85 PathProgramCache]: Analyzing trace with hash -442569351, now seen corresponding path program 2 times [2023-02-15 11:22:31,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:22:31,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764744149] [2023-02-15 11:22:31,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:22:31,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:22:31,088 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:22:31,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514491403] [2023-02-15 11:22:31,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:22:31,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:22:31,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:22:31,105 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 11:22:31,112 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 11:22:31,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:22:31,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:22:31,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 11:22:31,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:22:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-15 11:22:31,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:22:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-15 11:22:39,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:22:39,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764744149] [2023-02-15 11:22:39,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:22:39,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514491403] [2023-02-15 11:22:39,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514491403] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:22:39,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:22:39,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-02-15 11:22:39,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115213240] [2023-02-15 11:22:39,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:22:39,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 11:22:39,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:22:39,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 11:22:39,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-02-15 11:22:39,070 INFO L87 Difference]: Start difference. First operand 159 states and 194 transitions. Second operand has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 20 states have internal predecessors, (44), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-15 11:22:54,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:22:54,168 INFO L93 Difference]: Finished difference Result 228 states and 283 transitions. [2023-02-15 11:22:54,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 11:22:54,169 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 20 states have internal predecessors, (44), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 95 [2023-02-15 11:22:54,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:22:54,170 INFO L225 Difference]: With dead ends: 228 [2023-02-15 11:22:54,170 INFO L226 Difference]: Without dead ends: 178 [2023-02-15 11:22:54,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2023-02-15 11:22:54,171 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:22:54,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 157 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-02-15 11:22:54,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-02-15 11:22:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2023-02-15 11:22:54,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 104 states have (on average 1.125) internal successors, (117), 110 states have internal predecessors, (117), 45 states have call successors, (45), 18 states have call predecessors, (45), 18 states have return successors, (44), 39 states have call predecessors, (44), 44 states have call successors, (44) [2023-02-15 11:22:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 206 transitions. [2023-02-15 11:22:54,211 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 206 transitions. Word has length 95 [2023-02-15 11:22:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:22:54,211 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 206 transitions. [2023-02-15 11:22:54,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 20 states have internal predecessors, (44), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-15 11:22:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 206 transitions. [2023-02-15 11:22:54,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-15 11:22:54,213 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:22:54,213 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-15 11:22:54,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-15 11:22:54,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 11:22:54,418 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:22:54,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:22:54,419 INFO L85 PathProgramCache]: Analyzing trace with hash -2024814962, now seen corresponding path program 4 times [2023-02-15 11:22:54,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:22:54,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919497302] [2023-02-15 11:22:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:22:54,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:22:54,439 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:22:54,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922245131] [2023-02-15 11:22:54,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:22:54,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:22:54,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:22:54,442 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 11:22:54,443 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 11:22:54,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:22:54,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:22:54,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-15 11:22:54,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:23:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 166 proven. 49 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2023-02-15 11:23:06,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:23:44,808 WARN L233 SmtUtils]: Spent 15.85s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 11:23:48,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:23:48,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919497302] [2023-02-15 11:23:48,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:23:48,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922245131] [2023-02-15 11:23:48,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922245131] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:23:48,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:23:48,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-15 11:23:48,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752588160] [2023-02-15 11:23:48,912 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 11:23:48,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 11:23:48,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:23:48,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 11:23:48,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=450, Unknown=4, NotChecked=0, Total=552 [2023-02-15 11:23:48,913 INFO L87 Difference]: Start difference. First operand 168 states and 206 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 13 states have internal predecessors, (26), 10 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2023-02-15 11:23:51,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:23:54,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:23:58,726 WARN L539 Checker$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 11:24:02,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 11:24:04,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 11:24:05,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:24:09,253 WARN L539 Checker$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 11:24:10,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:24:10,061 INFO L93 Difference]: Finished difference Result 230 states and 277 transitions. [2023-02-15 11:24:10,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 11:24:10,062 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 13 states have internal predecessors, (26), 10 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 101 [2023-02-15 11:24:10,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:24:10,063 INFO L225 Difference]: With dead ends: 230 [2023-02-15 11:24:10,063 INFO L226 Difference]: Without dead ends: 187 [2023-02-15 11:24:10,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=120, Invalid=578, Unknown=4, NotChecked=0, Total=702 [2023-02-15 11:24:10,064 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 22 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 14 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2023-02-15 11:24:10,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 245 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 863 Invalid, 6 Unknown, 0 Unchecked, 20.6s Time] [2023-02-15 11:24:10,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-02-15 11:24:10,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 171. [2023-02-15 11:24:10,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 109 states have (on average 1.1009174311926606) internal successors, (120), 114 states have internal predecessors, (120), 40 states have call successors, (40), 21 states have call predecessors, (40), 21 states have return successors, (39), 35 states have call predecessors, (39), 39 states have call successors, (39) [2023-02-15 11:24:10,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 199 transitions. [2023-02-15 11:24:10,114 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 199 transitions. Word has length 101 [2023-02-15 11:24:10,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:24:10,114 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 199 transitions. [2023-02-15 11:24:10,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 13 states have internal predecessors, (26), 10 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2023-02-15 11:24:10,114 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 199 transitions. [2023-02-15 11:24:10,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-02-15 11:24:10,115 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:24:10,115 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-15 11:24:10,120 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 11:24:10,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:24:10,320 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:24:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:24:10,321 INFO L85 PathProgramCache]: Analyzing trace with hash 434759304, now seen corresponding path program 1 times [2023-02-15 11:24:10,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:24:10,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650267137] [2023-02-15 11:24:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:24:10,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:24:10,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:24:10,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320540548] [2023-02-15 11:24:10,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:24:10,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:24:10,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:24:10,328 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 11:24:10,330 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 11:24:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:24:10,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 11:24:10,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:24:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 318 proven. 0 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2023-02-15 11:24:10,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:24:10,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:24:10,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650267137] [2023-02-15 11:24:10,453 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:24:10,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320540548] [2023-02-15 11:24:10,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320540548] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:24:10,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:24:10,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 11:24:10,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552818032] [2023-02-15 11:24:10,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:24:10,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 11:24:10,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:24:10,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 11:24:10,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-15 11:24:10,455 INFO L87 Difference]: Start difference. First operand 171 states and 199 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-02-15 11:24:10,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:24:10,578 INFO L93 Difference]: Finished difference Result 198 states and 227 transitions. [2023-02-15 11:24:10,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:24:10,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 110 [2023-02-15 11:24:10,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:24:10,579 INFO L225 Difference]: With dead ends: 198 [2023-02-15 11:24:10,579 INFO L226 Difference]: Without dead ends: 127 [2023-02-15 11:24:10,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 11:24:10,580 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 5 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:24:10,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 103 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:24:10,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-15 11:24:10,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-02-15 11:24:10,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 84 states have internal predecessors, (89), 26 states have call successors, (26), 18 states have call predecessors, (26), 18 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-15 11:24:10,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 140 transitions. [2023-02-15 11:24:10,606 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 140 transitions. Word has length 110 [2023-02-15 11:24:10,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:24:10,607 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 140 transitions. [2023-02-15 11:24:10,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-02-15 11:24:10,607 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 140 transitions. [2023-02-15 11:24:10,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-02-15 11:24:10,608 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:24:10,608 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-02-15 11:24:10,613 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 11:24:10,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 11:24:10,812 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:24:10,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:24:10,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1864958347, now seen corresponding path program 5 times [2023-02-15 11:24:10,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:24:10,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650825668] [2023-02-15 11:24:10,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:24:10,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:24:10,818 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:24:10,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740954308] [2023-02-15 11:24:10,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:24:10,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:24:10,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:24:10,819 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 11:24:10,823 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 11:24:10,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-02-15 11:24:10,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:24:10,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-15 11:24:10,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:24:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 77 proven. 61 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-02-15 11:24:11,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:25:34,818 WARN L233 SmtUtils]: Spent 40.49s on a formula simplification that was a NOOP. DAG size: 126 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)