./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.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 05dbf98a57cbdf117305bcdd9c3dde8d1b2284b890adec5d1f5924f0e5e4bbbb --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 02:06:49,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 02:06:49,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 02:06:49,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 02:06:49,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 02:06:49,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 02:06:49,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 02:06:49,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 02:06:49,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 02:06:49,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 02:06:49,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 02:06:49,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 02:06:49,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 02:06:49,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 02:06:49,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 02:06:49,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 02:06:49,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 02:06:49,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 02:06:49,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 02:06:49,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 02:06:49,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 02:06:49,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 02:06:49,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 02:06:49,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 02:06:49,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 02:06:49,630 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 02:06:49,630 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 02:06:49,631 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 02:06:49,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 02:06:49,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 02:06:49,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 02:06:49,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 02:06:49,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 02:06:49,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 02:06:49,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 02:06:49,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 02:06:49,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 02:06:49,635 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 02:06:49,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 02:06:49,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 02:06:49,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 02:06:49,637 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 02:06:49,650 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 02:06:49,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 02:06:49,650 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 02:06:49,650 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 02:06:49,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 02:06:49,651 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 02:06:49,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 02:06:49,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 02:06:49,651 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 02:06:49,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 02:06:49,652 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 02:06:49,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 02:06:49,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 02:06:49,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 02:06:49,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 02:06:49,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 02:06:49,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 02:06:49,653 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 02:06:49,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 02:06:49,653 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 02:06:49,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 02:06:49,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 02:06:49,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 02:06:49,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 02:06:49,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 02:06:49,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 02:06:49,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 02:06:49,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 02:06:49,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 02:06:49,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 02:06:49,655 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 02:06:49,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 02:06:49,655 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 02:06:49,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 02:06:49,655 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 02:06:49,655 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05dbf98a57cbdf117305bcdd9c3dde8d1b2284b890adec5d1f5924f0e5e4bbbb [2023-02-16 02:06:49,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 02:06:49,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 02:06:49,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 02:06:49,871 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 02:06:49,871 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 02:06:49,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2023-02-16 02:06:50,856 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 02:06:51,007 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 02:06:51,007 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2023-02-16 02:06:51,011 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/835685aca/fcf5356221514d5287bb3de95c32fdb0/FLAGfa30032df [2023-02-16 02:06:51,020 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/835685aca/fcf5356221514d5287bb3de95c32fdb0 [2023-02-16 02:06:51,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 02:06:51,022 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 02:06:51,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 02:06:51,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 02:06:51,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 02:06:51,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 02:06:51" (1/1) ... [2023-02-16 02:06:51,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e4383c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:06:51, skipping insertion in model container [2023-02-16 02:06:51,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 02:06:51" (1/1) ... [2023-02-16 02:06:51,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 02:06:51,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 02:06:51,140 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c[490,503] [2023-02-16 02:06:51,152 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 02:06:51,158 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 02:06:51,165 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c[490,503] [2023-02-16 02:06:51,173 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 02:06:51,181 INFO L208 MainTranslator]: Completed translation [2023-02-16 02:06:51,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:06:51 WrapperNode [2023-02-16 02:06:51,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 02:06:51,182 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 02:06:51,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 02:06:51,183 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 02:06:51,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:06:51" (1/1) ... [2023-02-16 02:06:51,191 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:06:51" (1/1) ... [2023-02-16 02:06:51,201 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2023-02-16 02:06:51,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 02:06:51,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 02:06:51,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 02:06:51,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 02:06:51,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:06:51" (1/1) ... [2023-02-16 02:06:51,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:06:51" (1/1) ... [2023-02-16 02:06:51,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:06:51" (1/1) ... [2023-02-16 02:06:51,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:06:51" (1/1) ... [2023-02-16 02:06:51,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:06:51" (1/1) ... [2023-02-16 02:06:51,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:06:51" (1/1) ... [2023-02-16 02:06:51,217 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:06:51" (1/1) ... [2023-02-16 02:06:51,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:06:51" (1/1) ... [2023-02-16 02:06:51,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 02:06:51,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 02:06:51,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 02:06:51,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 02:06:51,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:06:51" (1/1) ... [2023-02-16 02:06:51,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 02:06:51,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:06:51,239 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) [2023-02-16 02:06:51,253 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 [2023-02-16 02:06:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 02:06:51,300 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-16 02:06:51,301 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-16 02:06:51,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 02:06:51,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 02:06:51,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 02:06:51,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-16 02:06:51,302 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-16 02:06:51,345 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 02:06:51,347 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 02:06:51,496 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 02:06:51,505 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 02:06:51,506 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-16 02:06:51,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:06:51 BoogieIcfgContainer [2023-02-16 02:06:51,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 02:06:51,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 02:06:51,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 02:06:51,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 02:06:51,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 02:06:51" (1/3) ... [2023-02-16 02:06:51,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4817b78e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:06:51, skipping insertion in model container [2023-02-16 02:06:51,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:06:51" (2/3) ... [2023-02-16 02:06:51,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4817b78e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:06:51, skipping insertion in model container [2023-02-16 02:06:51,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:06:51" (3/3) ... [2023-02-16 02:06:51,516 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.c [2023-02-16 02:06:51,528 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 02:06:51,528 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 02:06:51,571 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 02:06:51,577 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;@7d474776, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 02:06:51,577 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 02:06:51,582 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 02:06:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-16 02:06:51,587 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:06:51,587 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:06:51,588 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:06:51,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:06:51,592 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2023-02-16 02:06:51,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:06:51,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811033782] [2023-02-16 02:06:51,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:51,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:06:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:06:51,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:06:51,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811033782] [2023-02-16 02:06:51,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-16 02:06:51,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182165315] [2023-02-16 02:06:51,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:51,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:06:51,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:06:51,697 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) [2023-02-16 02:06:51,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 02:06:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:06:51,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-16 02:06:51,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:06:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 02:06:51,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 02:06:51,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182165315] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:06:51,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:06:51,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 02:06:51,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175923327] [2023-02-16 02:06:51,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:06:51,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 02:06:51,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:06:51,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 02:06:51,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 02:06:51,823 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 02:06:51,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:06:51,838 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2023-02-16 02:06:51,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 02:06:51,840 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-02-16 02:06:51,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:06:51,844 INFO L225 Difference]: With dead ends: 67 [2023-02-16 02:06:51,844 INFO L226 Difference]: Without dead ends: 31 [2023-02-16 02:06:51,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 02:06:51,863 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:06:51,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:06:51,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-16 02:06:51,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-16 02:06:51,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-16 02:06:51,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2023-02-16 02:06:51,913 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2023-02-16 02:06:51,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:06:51,914 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2023-02-16 02:06:51,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 02:06:51,914 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2023-02-16 02:06:51,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-16 02:06:51,916 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:06:51,916 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:06:51,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 02:06:52,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-16 02:06:52,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:06:52,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:06:52,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2023-02-16 02:06:52,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:06:52,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146036310] [2023-02-16 02:06:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:52,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:06:52,137 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:06:52,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1084249996] [2023-02-16 02:06:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:52,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:06:52,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:06:52,139 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) [2023-02-16 02:06:52,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 02:06:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:06:52,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-16 02:06:52,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:06:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 02:06:52,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 02:06:52,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:06:52,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146036310] [2023-02-16 02:06:52,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:06:52,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084249996] [2023-02-16 02:06:52,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084249996] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:06:52,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:06:52,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 02:06:52,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426606577] [2023-02-16 02:06:52,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:06:52,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 02:06:52,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:06:52,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 02:06:52,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 02:06:52,260 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-16 02:06:52,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:06:52,337 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2023-02-16 02:06:52,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 02:06:52,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2023-02-16 02:06:52,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:06:52,339 INFO L225 Difference]: With dead ends: 50 [2023-02-16 02:06:52,339 INFO L226 Difference]: Without dead ends: 43 [2023-02-16 02:06:52,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-16 02:06:52,340 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:06:52,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 113 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:06:52,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-16 02:06:52,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2023-02-16 02:06:52,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-16 02:06:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-02-16 02:06:52,354 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2023-02-16 02:06:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:06:52,354 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-02-16 02:06:52,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-16 02:06:52,355 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-02-16 02:06:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-16 02:06:52,355 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:06:52,356 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:06:52,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 02:06:52,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-16 02:06:52,557 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:06:52,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:06:52,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2023-02-16 02:06:52,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:06:52,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814004245] [2023-02-16 02:06:52,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:52,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:06:52,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:06:52,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933025138] [2023-02-16 02:06:52,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:52,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:06:52,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:06:52,590 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) [2023-02-16 02:06:52,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 02:06:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:06:52,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 02:06:52,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:06:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 02:06:52,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 02:06:52,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:06:52,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814004245] [2023-02-16 02:06:52,737 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:06:52,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933025138] [2023-02-16 02:06:52,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933025138] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:06:52,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:06:52,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-16 02:06:52,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491244778] [2023-02-16 02:06:52,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:06:52,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 02:06:52,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:06:52,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 02:06:52,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-16 02:06:52,738 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-16 02:06:52,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:06:52,855 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2023-02-16 02:06:52,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 02:06:52,856 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2023-02-16 02:06:52,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:06:52,858 INFO L225 Difference]: With dead ends: 49 [2023-02-16 02:06:52,860 INFO L226 Difference]: Without dead ends: 47 [2023-02-16 02:06:52,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-16 02:06:52,861 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:06:52,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 161 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:06:52,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-16 02:06:52,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-02-16 02:06:52,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-16 02:06:52,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-02-16 02:06:52,891 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2023-02-16 02:06:52,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:06:52,891 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-02-16 02:06:52,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-16 02:06:52,892 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-02-16 02:06:52,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-16 02:06:52,892 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:06:52,892 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:06:52,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 02:06:53,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:06:53,093 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:06:53,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:06:53,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2023-02-16 02:06:53,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:06:53,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916264938] [2023-02-16 02:06:53,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:53,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:06:53,111 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:06:53,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732748676] [2023-02-16 02:06:53,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:53,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:06:53,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:06:53,122 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) [2023-02-16 02:06:53,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 02:06:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:06:53,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-16 02:06:53,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:06:53,234 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 02:06:53,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:06:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 02:06:53,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:06:53,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916264938] [2023-02-16 02:06:53,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:06:53,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732748676] [2023-02-16 02:06:53,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732748676] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:06:53,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:06:53,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-16 02:06:53,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520396396] [2023-02-16 02:06:53,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:06:53,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 02:06:53,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:06:53,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 02:06:53,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-16 02:06:53,329 INFO L87 Difference]: Start difference. First operand 46 states and 60 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 02:06:53,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:06:53,507 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2023-02-16 02:06:53,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 02:06:53,508 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-02-16 02:06:53,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:06:53,514 INFO L225 Difference]: With dead ends: 99 [2023-02-16 02:06:53,514 INFO L226 Difference]: Without dead ends: 92 [2023-02-16 02:06:53,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-16 02:06:53,521 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 61 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:06:53,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 242 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:06:53,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-16 02:06:53,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2023-02-16 02:06:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-16 02:06:53,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2023-02-16 02:06:53,547 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2023-02-16 02:06:53,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:06:53,547 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2023-02-16 02:06:53,547 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 02:06:53,547 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2023-02-16 02:06:53,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-16 02:06:53,549 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:06:53,550 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:06:53,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 02:06:53,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:06:53,755 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:06:53,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:06:53,756 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2023-02-16 02:06:53,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:06:53,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563873603] [2023-02-16 02:06:53,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:53,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:06:53,794 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:06:53,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155636882] [2023-02-16 02:06:53,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:53,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:06:53,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:06:53,799 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) [2023-02-16 02:06:53,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 02:06:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:06:53,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 02:06:53,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:06:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-16 02:06:53,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:06:54,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:06:54,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563873603] [2023-02-16 02:06:54,035 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:06:54,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155636882] [2023-02-16 02:06:54,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155636882] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:06:54,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 02:06:54,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-16 02:06:54,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614336987] [2023-02-16 02:06:54,036 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 02:06:54,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 02:06:54,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:06:54,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 02:06:54,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-16 02:06:54,037 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-16 02:06:54,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:06:54,109 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2023-02-16 02:06:54,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 02:06:54,110 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-02-16 02:06:54,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:06:54,112 INFO L225 Difference]: With dead ends: 75 [2023-02-16 02:06:54,112 INFO L226 Difference]: Without dead ends: 73 [2023-02-16 02:06:54,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-16 02:06:54,113 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:06:54,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 145 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:06:54,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-16 02:06:54,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2023-02-16 02:06:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-16 02:06:54,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2023-02-16 02:06:54,136 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2023-02-16 02:06:54,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:06:54,137 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2023-02-16 02:06:54,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-16 02:06:54,137 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2023-02-16 02:06:54,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-16 02:06:54,141 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:06:54,141 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:06:54,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 02:06:54,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:06:54,346 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:06:54,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:06:54,351 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2023-02-16 02:06:54,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:06:54,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975679155] [2023-02-16 02:06:54,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:54,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:06:54,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:06:54,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837885296] [2023-02-16 02:06:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:54,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:06:54,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:06:54,365 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) [2023-02-16 02:06:54,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 02:06:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:06:54,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-16 02:06:54,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:06:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 02:06:54,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:06:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-16 02:06:54,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:06:54,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975679155] [2023-02-16 02:06:54,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:06:54,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837885296] [2023-02-16 02:06:54,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837885296] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:06:54,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:06:54,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2023-02-16 02:06:54,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162165618] [2023-02-16 02:06:54,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:06:54,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-16 02:06:54,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:06:54,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-16 02:06:54,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-02-16 02:06:54,791 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-16 02:06:55,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:06:55,154 INFO L93 Difference]: Finished difference Result 114 states and 155 transitions. [2023-02-16 02:06:55,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 02:06:55,154 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 38 [2023-02-16 02:06:55,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:06:55,155 INFO L225 Difference]: With dead ends: 114 [2023-02-16 02:06:55,155 INFO L226 Difference]: Without dead ends: 112 [2023-02-16 02:06:55,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-02-16 02:06:55,156 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 96 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:06:55,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 312 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:06:55,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-16 02:06:55,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 101. [2023-02-16 02:06:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-16 02:06:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2023-02-16 02:06:55,169 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 38 [2023-02-16 02:06:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:06:55,169 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2023-02-16 02:06:55,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-16 02:06:55,170 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2023-02-16 02:06:55,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-16 02:06:55,170 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:06:55,171 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:06:55,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 02:06:55,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:06:55,375 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:06:55,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:06:55,376 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2023-02-16 02:06:55,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:06:55,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175050072] [2023-02-16 02:06:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:55,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:06:55,385 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:06:55,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027229226] [2023-02-16 02:06:55,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:55,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:06:55,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:06:55,386 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) [2023-02-16 02:06:55,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 02:06:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:06:55,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-16 02:06:55,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:06:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 02:06:55,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:06:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-16 02:06:55,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:06:55,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175050072] [2023-02-16 02:06:55,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:06:55,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027229226] [2023-02-16 02:06:55,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027229226] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-16 02:06:55,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 02:06:55,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2023-02-16 02:06:55,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795286721] [2023-02-16 02:06:55,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:06:55,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 02:06:55,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:06:55,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 02:06:55,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-16 02:06:55,923 INFO L87 Difference]: Start difference. First operand 101 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 02:06:55,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:06:55,978 INFO L93 Difference]: Finished difference Result 147 states and 209 transitions. [2023-02-16 02:06:55,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 02:06:55,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2023-02-16 02:06:55,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:06:55,980 INFO L225 Difference]: With dead ends: 147 [2023-02-16 02:06:55,980 INFO L226 Difference]: Without dead ends: 145 [2023-02-16 02:06:55,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-02-16 02:06:55,981 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:06:55,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:06:55,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-02-16 02:06:56,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2023-02-16 02:06:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 88 states have internal predecessors, (112), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-02-16 02:06:56,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 201 transitions. [2023-02-16 02:06:56,010 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 201 transitions. Word has length 43 [2023-02-16 02:06:56,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:06:56,011 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 201 transitions. [2023-02-16 02:06:56,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 02:06:56,012 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 201 transitions. [2023-02-16 02:06:56,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-16 02:06:56,013 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:06:56,014 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:06:56,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 02:06:56,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:06:56,219 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:06:56,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:06:56,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2023-02-16 02:06:56,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:06:56,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160944154] [2023-02-16 02:06:56,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:56,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:06:56,244 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:06:56,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003932106] [2023-02-16 02:06:56,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:56,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:06:56,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:06:56,251 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) [2023-02-16 02:06:56,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 02:06:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:06:56,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-16 02:06:56,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:06:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-16 02:06:56,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:06:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-16 02:06:56,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:06:56,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160944154] [2023-02-16 02:06:56,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:06:56,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003932106] [2023-02-16 02:06:56,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003932106] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:06:56,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:06:56,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-02-16 02:06:56,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176148727] [2023-02-16 02:06:56,528 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:06:56,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-16 02:06:56,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:06:56,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-16 02:06:56,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-02-16 02:06:56,529 INFO L87 Difference]: Start difference. First operand 139 states and 201 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 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) [2023-02-16 02:06:57,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:06:57,314 INFO L93 Difference]: Finished difference Result 198 states and 280 transitions. [2023-02-16 02:06:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 02:06:57,314 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 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 43 [2023-02-16 02:06:57,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:06:57,320 INFO L225 Difference]: With dead ends: 198 [2023-02-16 02:06:57,320 INFO L226 Difference]: Without dead ends: 196 [2023-02-16 02:06:57,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-02-16 02:06:57,322 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 116 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 02:06:57,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 202 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 02:06:57,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-02-16 02:06:57,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 187. [2023-02-16 02:06:57,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 117 states have (on average 1.264957264957265) internal successors, (148), 123 states have internal predecessors, (148), 61 states have call successors, (61), 8 states have call predecessors, (61), 8 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2023-02-16 02:06:57,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 269 transitions. [2023-02-16 02:06:57,361 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 269 transitions. Word has length 43 [2023-02-16 02:06:57,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:06:57,361 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 269 transitions. [2023-02-16 02:06:57,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 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) [2023-02-16 02:06:57,361 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 269 transitions. [2023-02-16 02:06:57,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-16 02:06:57,370 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:06:57,371 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:06:57,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 02:06:57,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-16 02:06:57,578 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:06:57,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:06:57,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2023-02-16 02:06:57,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:06:57,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480949415] [2023-02-16 02:06:57,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:57,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:06:57,587 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:06:57,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44613676] [2023-02-16 02:06:57,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:57,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:06:57,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:06:57,588 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) [2023-02-16 02:06:57,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 02:06:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:06:57,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-16 02:06:57,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:06:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-16 02:06:57,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:06:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-16 02:06:57,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:06:57,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480949415] [2023-02-16 02:06:57,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:06:57,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44613676] [2023-02-16 02:06:57,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44613676] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-16 02:06:57,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 02:06:57,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-02-16 02:06:57,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700491433] [2023-02-16 02:06:57,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:06:57,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 02:06:57,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:06:57,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 02:06:57,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-16 02:06:57,743 INFO L87 Difference]: Start difference. First operand 187 states and 269 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-16 02:06:57,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:06:57,799 INFO L93 Difference]: Finished difference Result 194 states and 275 transitions. [2023-02-16 02:06:57,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 02:06:57,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2023-02-16 02:06:57,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:06:57,801 INFO L225 Difference]: With dead ends: 194 [2023-02-16 02:06:57,801 INFO L226 Difference]: Without dead ends: 192 [2023-02-16 02:06:57,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-16 02:06:57,802 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:06:57,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:06:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-02-16 02:06:57,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2023-02-16 02:06:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 120 states have (on average 1.2583333333333333) internal successors, (151), 126 states have internal predecessors, (151), 61 states have call successors, (61), 9 states have call predecessors, (61), 9 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2023-02-16 02:06:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 272 transitions. [2023-02-16 02:06:57,831 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 272 transitions. Word has length 48 [2023-02-16 02:06:57,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:06:57,831 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 272 transitions. [2023-02-16 02:06:57,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-16 02:06:57,832 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 272 transitions. [2023-02-16 02:06:57,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-16 02:06:57,832 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:06:57,832 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:06:57,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-16 02:06:58,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:06:58,038 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:06:58,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:06:58,038 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2023-02-16 02:06:58,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:06:58,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628588156] [2023-02-16 02:06:58,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:58,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:06:58,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:06:58,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300557089] [2023-02-16 02:06:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:58,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:06:58,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:06:58,047 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) [2023-02-16 02:06:58,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 02:06:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:06:58,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-16 02:06:58,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:06:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-16 02:06:58,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:06:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-16 02:06:59,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:06:59,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628588156] [2023-02-16 02:06:59,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:06:59,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300557089] [2023-02-16 02:06:59,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300557089] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:06:59,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:06:59,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-02-16 02:06:59,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500857052] [2023-02-16 02:06:59,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:06:59,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-16 02:06:59,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:06:59,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-16 02:06:59,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-02-16 02:06:59,479 INFO L87 Difference]: Start difference. First operand 191 states and 272 transitions. Second operand has 26 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-16 02:07:11,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:07:11,649 INFO L93 Difference]: Finished difference Result 471 states and 681 transitions. [2023-02-16 02:07:11,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-16 02:07:11,652 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 60 [2023-02-16 02:07:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:07:11,654 INFO L225 Difference]: With dead ends: 471 [2023-02-16 02:07:11,654 INFO L226 Difference]: Without dead ends: 366 [2023-02-16 02:07:11,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=523, Invalid=2447, Unknown=0, NotChecked=0, Total=2970 [2023-02-16 02:07:11,656 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 154 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:07:11,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 235 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-02-16 02:07:11,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2023-02-16 02:07:11,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 304. [2023-02-16 02:07:11,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 198 states have (on average 1.2474747474747474) internal successors, (247), 203 states have internal predecessors, (247), 91 states have call successors, (91), 14 states have call predecessors, (91), 14 states have return successors, (90), 86 states have call predecessors, (90), 90 states have call successors, (90) [2023-02-16 02:07:11,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 428 transitions. [2023-02-16 02:07:11,753 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 428 transitions. Word has length 60 [2023-02-16 02:07:11,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:07:11,753 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 428 transitions. [2023-02-16 02:07:11,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-16 02:07:11,753 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 428 transitions. [2023-02-16 02:07:11,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-16 02:07:11,754 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:07:11,754 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:07:11,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 02:07:11,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-16 02:07:11,959 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:07:11,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:07:11,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1726486837, now seen corresponding path program 1 times [2023-02-16 02:07:11,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:07:11,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207309782] [2023-02-16 02:07:11,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:07:11,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:07:11,967 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:07:11,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175957372] [2023-02-16 02:07:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:07:11,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:07:11,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:07:11,978 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) [2023-02-16 02:07:11,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 02:07:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:07:12,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-16 02:07:12,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:07:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-16 02:07:12,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:07:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-16 02:07:12,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:07:12,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207309782] [2023-02-16 02:07:12,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:07:12,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175957372] [2023-02-16 02:07:12,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175957372] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:07:12,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:07:12,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-02-16 02:07:12,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978810864] [2023-02-16 02:07:12,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:07:12,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 02:07:12,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:07:12,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 02:07:12,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-02-16 02:07:12,126 INFO L87 Difference]: Start difference. First operand 304 states and 428 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-16 02:07:12,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:07:12,425 INFO L93 Difference]: Finished difference Result 501 states and 711 transitions. [2023-02-16 02:07:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-16 02:07:12,425 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 68 [2023-02-16 02:07:12,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:07:12,427 INFO L225 Difference]: With dead ends: 501 [2023-02-16 02:07:12,427 INFO L226 Difference]: Without dead ends: 292 [2023-02-16 02:07:12,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2023-02-16 02:07:12,430 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 52 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:07:12,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 232 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:07:12,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-02-16 02:07:12,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 239. [2023-02-16 02:07:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 150 states have (on average 1.18) internal successors, (177), 152 states have internal predecessors, (177), 75 states have call successors, (75), 13 states have call predecessors, (75), 13 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2023-02-16 02:07:12,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 326 transitions. [2023-02-16 02:07:12,502 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 326 transitions. Word has length 68 [2023-02-16 02:07:12,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:07:12,503 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 326 transitions. [2023-02-16 02:07:12,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-16 02:07:12,503 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 326 transitions. [2023-02-16 02:07:12,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-16 02:07:12,504 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:07:12,504 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:07:12,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-16 02:07:12,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-16 02:07:12,709 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:07:12,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:07:12,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 2 times [2023-02-16 02:07:12,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:07:12,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465904560] [2023-02-16 02:07:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:07:12,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:07:12,717 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:07:12,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867815623] [2023-02-16 02:07:12,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:07:12,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:07:12,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:07:12,718 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:07:12,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 02:07:12,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:07:12,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:07:12,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 69 conjunts are in the unsatisfiable core [2023-02-16 02:07:12,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:07:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-16 02:07:13,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:07:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-16 02:07:15,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:07:15,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465904560] [2023-02-16 02:07:15,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:07:15,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867815623] [2023-02-16 02:07:15,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867815623] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:07:15,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:07:15,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-02-16 02:07:15,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077436145] [2023-02-16 02:07:15,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:07:15,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-16 02:07:15,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:07:15,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-16 02:07:15,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2023-02-16 02:07:15,200 INFO L87 Difference]: Start difference. First operand 239 states and 326 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 25 states have internal predecessors, (59), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-16 02:07:41,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:07:41,673 INFO L93 Difference]: Finished difference Result 391 states and 540 transitions. [2023-02-16 02:07:41,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-16 02:07:41,674 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 25 states have internal predecessors, (59), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 73 [2023-02-16 02:07:41,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:07:41,675 INFO L225 Difference]: With dead ends: 391 [2023-02-16 02:07:41,675 INFO L226 Difference]: Without dead ends: 389 [2023-02-16 02:07:41,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=563, Invalid=2407, Unknown=0, NotChecked=0, Total=2970 [2023-02-16 02:07:41,676 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 244 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:07:41,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 377 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time] [2023-02-16 02:07:41,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-02-16 02:07:41,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 332. [2023-02-16 02:07:41,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 204 states have (on average 1.1911764705882353) internal successors, (243), 205 states have internal predecessors, (243), 109 states have call successors, (109), 18 states have call predecessors, (109), 18 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2023-02-16 02:07:41,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 460 transitions. [2023-02-16 02:07:41,805 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 460 transitions. Word has length 73 [2023-02-16 02:07:41,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:07:41,805 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 460 transitions. [2023-02-16 02:07:41,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 25 states have internal predecessors, (59), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-16 02:07:41,806 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 460 transitions. [2023-02-16 02:07:41,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-16 02:07:41,806 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:07:41,807 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:07:41,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 02:07:42,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-16 02:07:42,011 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:07:42,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:07:42,012 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2023-02-16 02:07:42,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:07:42,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68054129] [2023-02-16 02:07:42,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:07:42,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:07:42,027 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:07:42,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281599255] [2023-02-16 02:07:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:07:42,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:07:42,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:07:42,029 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:07:42,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 02:07:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:07:42,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-16 02:07:42,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:07:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-02-16 02:07:42,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:07:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-02-16 02:07:50,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:07:50,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68054129] [2023-02-16 02:07:50,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:07:50,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281599255] [2023-02-16 02:07:50,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281599255] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:07:50,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:07:50,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-02-16 02:07:50,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941018812] [2023-02-16 02:07:50,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:07:50,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-16 02:07:50,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:07:50,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-16 02:07:50,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 02:07:50,278 INFO L87 Difference]: Start difference. First operand 332 states and 460 transitions. Second operand has 33 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-02-16 02:08:02,263 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 [] [2023-02-16 02:08:22,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:08:33,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:08:33,431 INFO L93 Difference]: Finished difference Result 553 states and 779 transitions. [2023-02-16 02:08:33,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-02-16 02:08:33,432 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 87 [2023-02-16 02:08:33,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:08:33,434 INFO L225 Difference]: With dead ends: 553 [2023-02-16 02:08:33,434 INFO L226 Difference]: Without dead ends: 545 [2023-02-16 02:08:33,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2461 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=1550, Invalid=7192, Unknown=0, NotChecked=0, Total=8742 [2023-02-16 02:08:33,437 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 322 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 2686 mSolverCounterSat, 529 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 3217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 2686 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:08:33,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 463 Invalid, 3217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 2686 Invalid, 2 Unknown, 0 Unchecked, 17.0s Time] [2023-02-16 02:08:33,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-02-16 02:08:33,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 489. [2023-02-16 02:08:33,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 301 states have (on average 1.2093023255813953) internal successors, (364), 302 states have internal predecessors, (364), 165 states have call successors, (165), 22 states have call predecessors, (165), 22 states have return successors, (164), 164 states have call predecessors, (164), 164 states have call successors, (164) [2023-02-16 02:08:33,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 693 transitions. [2023-02-16 02:08:33,786 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 693 transitions. Word has length 87 [2023-02-16 02:08:33,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:08:33,786 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 693 transitions. [2023-02-16 02:08:33,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-02-16 02:08:33,787 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 693 transitions. [2023-02-16 02:08:33,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-16 02:08:33,789 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:08:33,789 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:08:33,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-16 02:08:33,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-16 02:08:33,994 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:08:33,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:08:33,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1330396859, now seen corresponding path program 2 times [2023-02-16 02:08:33,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:08:33,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183777438] [2023-02-16 02:08:33,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:08:33,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:08:34,023 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:08:34,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906370367] [2023-02-16 02:08:34,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:08:34,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:08:34,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:08:34,026 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:08:34,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 02:08:34,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:08:34,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:08:34,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-16 02:08:34,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:08:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-02-16 02:08:34,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:08:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-02-16 02:08:34,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:08:34,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183777438] [2023-02-16 02:08:34,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:08:34,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906370367] [2023-02-16 02:08:34,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906370367] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:08:34,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:08:34,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2023-02-16 02:08:34,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439474617] [2023-02-16 02:08:34,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:08:34,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 02:08:34,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:08:34,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 02:08:34,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-02-16 02:08:34,235 INFO L87 Difference]: Start difference. First operand 489 states and 693 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-16 02:08:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:08:35,045 INFO L93 Difference]: Finished difference Result 604 states and 857 transitions. [2023-02-16 02:08:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-16 02:08:35,046 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 95 [2023-02-16 02:08:35,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:08:35,049 INFO L225 Difference]: With dead ends: 604 [2023-02-16 02:08:35,049 INFO L226 Difference]: Without dead ends: 597 [2023-02-16 02:08:35,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 179 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2023-02-16 02:08:35,050 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 81 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:08:35,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 360 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:08:35,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2023-02-16 02:08:35,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 452. [2023-02-16 02:08:35,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 272 states have (on average 1.2169117647058822) internal successors, (331), 273 states have internal predecessors, (331), 157 states have call successors, (157), 22 states have call predecessors, (157), 22 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2023-02-16 02:08:35,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 644 transitions. [2023-02-16 02:08:35,365 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 644 transitions. Word has length 95 [2023-02-16 02:08:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:08:35,366 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 644 transitions. [2023-02-16 02:08:35,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-16 02:08:35,366 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 644 transitions. [2023-02-16 02:08:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-02-16 02:08:35,370 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:08:35,370 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:08:35,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-16 02:08:35,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:08:35,575 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:08:35,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:08:35,575 INFO L85 PathProgramCache]: Analyzing trace with hash 2024025072, now seen corresponding path program 2 times [2023-02-16 02:08:35,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:08:35,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674802623] [2023-02-16 02:08:35,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:08:35,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:08:35,594 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:08:35,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181760045] [2023-02-16 02:08:35,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:08:35,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:08:35,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:08:35,595 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:08:35,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-16 02:08:35,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:08:35,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:08:35,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-16 02:08:35,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:08:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 56 proven. 37 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-02-16 02:08:36,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:08:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 50 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-02-16 02:08:40,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:08:40,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674802623] [2023-02-16 02:08:40,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:08:40,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181760045] [2023-02-16 02:08:40,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181760045] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:08:40,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:08:40,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2023-02-16 02:08:40,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272223818] [2023-02-16 02:08:40,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:08:40,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-16 02:08:40,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:08:40,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-16 02:08:40,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2023-02-16 02:08:40,927 INFO L87 Difference]: Start difference. First operand 452 states and 644 transitions. Second operand has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-02-16 02:08:52,137 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 [] [2023-02-16 02:09:44,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:09:44,845 INFO L93 Difference]: Finished difference Result 874 states and 1263 transitions. [2023-02-16 02:09:44,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-16 02:09:44,846 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 107 [2023-02-16 02:09:44,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:09:44,857 INFO L225 Difference]: With dead ends: 874 [2023-02-16 02:09:44,857 INFO L226 Difference]: Without dead ends: 690 [2023-02-16 02:09:44,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=1595, Invalid=7147, Unknown=0, NotChecked=0, Total=8742 [2023-02-16 02:09:44,861 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 263 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 2143 mSolverCounterSat, 558 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 2702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 2143 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.6s IncrementalHoareTripleChecker+Time [2023-02-16 02:09:44,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 368 Invalid, 2702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 2143 Invalid, 1 Unknown, 0 Unchecked, 25.6s Time] [2023-02-16 02:09:44,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2023-02-16 02:09:45,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 618. [2023-02-16 02:09:45,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 366 states have (on average 1.221311475409836) internal successors, (447), 367 states have internal predecessors, (447), 225 states have call successors, (225), 26 states have call predecessors, (225), 26 states have return successors, (224), 224 states have call predecessors, (224), 224 states have call successors, (224) [2023-02-16 02:09:45,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 896 transitions. [2023-02-16 02:09:45,371 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 896 transitions. Word has length 107 [2023-02-16 02:09:45,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:09:45,371 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 896 transitions. [2023-02-16 02:09:45,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-02-16 02:09:45,371 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 896 transitions. [2023-02-16 02:09:45,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-16 02:09:45,373 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:09:45,373 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:09:45,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-16 02:09:45,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-16 02:09:45,577 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:09:45,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:09:45,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1576994048, now seen corresponding path program 1 times [2023-02-16 02:09:45,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:09:45,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681666473] [2023-02-16 02:09:45,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:09:45,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:09:45,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:09:45,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324945788] [2023-02-16 02:09:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:09:45,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:09:45,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:09:45,585 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:09:45,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-16 02:09:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:09:45,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-16 02:09:45,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:09:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 48 proven. 30 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2023-02-16 02:09:45,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:09:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2023-02-16 02:09:46,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:09:46,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681666473] [2023-02-16 02:09:46,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:09:46,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324945788] [2023-02-16 02:09:46,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324945788] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:09:46,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:09:46,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-02-16 02:09:46,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708454259] [2023-02-16 02:09:46,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:09:46,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-16 02:09:46,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:09:46,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-16 02:09:46,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-02-16 02:09:46,733 INFO L87 Difference]: Start difference. First operand 618 states and 896 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 19 states have internal predecessors, (54), 9 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2023-02-16 02:09:50,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:09:50,038 INFO L93 Difference]: Finished difference Result 1478 states and 2237 transitions. [2023-02-16 02:09:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-16 02:09:50,039 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 19 states have internal predecessors, (54), 9 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 120 [2023-02-16 02:09:50,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:09:50,054 INFO L225 Difference]: With dead ends: 1478 [2023-02-16 02:09:50,055 INFO L226 Difference]: Without dead ends: 1173 [2023-02-16 02:09:50,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=433, Invalid=1729, Unknown=0, NotChecked=0, Total=2162 [2023-02-16 02:09:50,056 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 168 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:09:50,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 579 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-16 02:09:50,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2023-02-16 02:09:51,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 1079. [2023-02-16 02:09:51,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 554 states have (on average 1.2761732851985559) internal successors, (707), 559 states have internal predecessors, (707), 492 states have call successors, (492), 32 states have call predecessors, (492), 32 states have return successors, (491), 487 states have call predecessors, (491), 491 states have call successors, (491) [2023-02-16 02:09:51,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1690 transitions. [2023-02-16 02:09:51,294 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1690 transitions. Word has length 120 [2023-02-16 02:09:51,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:09:51,295 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 1690 transitions. [2023-02-16 02:09:51,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 19 states have internal predecessors, (54), 9 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2023-02-16 02:09:51,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1690 transitions. [2023-02-16 02:09:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-16 02:09:51,325 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:09:51,325 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:09:51,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-16 02:09:51,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-16 02:09:51,530 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:09:51,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:09:51,531 INFO L85 PathProgramCache]: Analyzing trace with hash -843376510, now seen corresponding path program 2 times [2023-02-16 02:09:51,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:09:51,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121963085] [2023-02-16 02:09:51,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:09:51,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:09:51,538 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:09:51,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514803382] [2023-02-16 02:09:51,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:09:51,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:09:51,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:09:51,540 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:09:51,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-16 02:09:51,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:09:51,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:09:51,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 98 conjunts are in the unsatisfiable core [2023-02-16 02:09:51,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:09:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 55 proven. 74 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-02-16 02:09:52,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:10:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 59 proven. 58 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-02-16 02:10:03,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:10:03,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121963085] [2023-02-16 02:10:03,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:10:03,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514803382] [2023-02-16 02:10:03,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514803382] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:10:03,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:10:03,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20] total 41 [2023-02-16 02:10:03,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678774135] [2023-02-16 02:10:03,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:10:03,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-16 02:10:03,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:10:03,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-16 02:10:03,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1353, Unknown=0, NotChecked=0, Total=1640 [2023-02-16 02:10:03,772 INFO L87 Difference]: Start difference. First operand 1079 states and 1690 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 39 states have internal predecessors, (79), 12 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 12 states have call predecessors, (34), 12 states have call successors, (34) [2023-02-16 02:10:19,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:10:22,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:10:24,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:10:42,143 WARN L233 SmtUtils]: Spent 13.08s on a formula simplification. DAG size of input: 140 DAG size of output: 139 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 02:10:46,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:10:57,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:10:59,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:11:11,327 WARN L233 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 76 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 02:11:20,710 WARN L233 SmtUtils]: Spent 9.07s on a formula simplification. DAG size of input: 93 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 02:11:27,468 WARN L233 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 77 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 02:11:32,847 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 []