./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd2-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/egcd2-ll.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 ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 20:19:25,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 20:19:25,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 20:19:25,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 20:19:25,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 20:19:25,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 20:19:25,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 20:19:25,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 20:19:25,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 20:19:25,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 20:19:25,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 20:19:25,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 20:19:25,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 20:19:25,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 20:19:25,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 20:19:25,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 20:19:25,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 20:19:25,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 20:19:25,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 20:19:25,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 20:19:25,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 20:19:25,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 20:19:25,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 20:19:25,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 20:19:25,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 20:19:25,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 20:19:25,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 20:19:25,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 20:19:25,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 20:19:25,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 20:19:25,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 20:19:25,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 20:19:25,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 20:19:25,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 20:19:25,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 20:19:25,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 20:19:25,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 20:19:25,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 20:19:25,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 20:19:25,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 20:19:25,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 20:19:25,249 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 20:19:25,273 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 20:19:25,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 20:19:25,273 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 20:19:25,274 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 20:19:25,274 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 20:19:25,275 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 20:19:25,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 20:19:25,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 20:19:25,275 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 20:19:25,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 20:19:25,276 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 20:19:25,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 20:19:25,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 20:19:25,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 20:19:25,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 20:19:25,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 20:19:25,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 20:19:25,277 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 20:19:25,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 20:19:25,277 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 20:19:25,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 20:19:25,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 20:19:25,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 20:19:25,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 20:19:25,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:19:25,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 20:19:25,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 20:19:25,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 20:19:25,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 20:19:25,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 20:19:25,279 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 20:19:25,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 20:19:25,280 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 20:19:25,280 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 20:19:25,280 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 20:19:25,280 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 [2023-02-15 20:19:25,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 20:19:25,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 20:19:25,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 20:19:25,473 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 20:19:25,473 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 20:19:25,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2023-02-15 20:19:26,419 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 20:19:26,597 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 20:19:26,597 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2023-02-15 20:19:26,603 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01d217529/4bd1cdc0ae774f06869af7ffda8fe668/FLAG2f07c8df9 [2023-02-15 20:19:26,615 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01d217529/4bd1cdc0ae774f06869af7ffda8fe668 [2023-02-15 20:19:26,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 20:19:26,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 20:19:26,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 20:19:26,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 20:19:26,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 20:19:26,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:19:26" (1/1) ... [2023-02-15 20:19:26,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e755366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:19:26, skipping insertion in model container [2023-02-15 20:19:26,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:19:26" (1/1) ... [2023-02-15 20:19:26,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 20:19:26,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 20:19:26,747 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/egcd2-ll.c[490,503] [2023-02-15 20:19:26,764 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:19:26,770 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 20:19:26,778 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/egcd2-ll.c[490,503] [2023-02-15 20:19:26,784 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:19:26,796 INFO L208 MainTranslator]: Completed translation [2023-02-15 20:19:26,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:19:26 WrapperNode [2023-02-15 20:19:26,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 20:19:26,797 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 20:19:26,797 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 20:19:26,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 20:19:26,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:19:26" (1/1) ... [2023-02-15 20:19:26,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:19:26" (1/1) ... [2023-02-15 20:19:26,816 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 75 [2023-02-15 20:19:26,816 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 20:19:26,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 20:19:26,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 20:19:26,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 20:19:26,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:19:26" (1/1) ... [2023-02-15 20:19:26,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:19:26" (1/1) ... [2023-02-15 20:19:26,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:19:26" (1/1) ... [2023-02-15 20:19:26,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:19:26" (1/1) ... [2023-02-15 20:19:26,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:19:26" (1/1) ... [2023-02-15 20:19:26,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:19:26" (1/1) ... [2023-02-15 20:19:26,828 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:19:26" (1/1) ... [2023-02-15 20:19:26,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:19:26" (1/1) ... [2023-02-15 20:19:26,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 20:19:26,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 20:19:26,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 20:19:26,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 20:19:26,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:19:26" (1/1) ... [2023-02-15 20:19:26,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:19:26,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:19:26,852 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 20:19:26,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 20:19:26,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 20:19:26,882 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 20:19:26,882 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 20:19:26,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 20:19:26,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 20:19:26,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 20:19:26,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 20:19:26,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 20:19:26,928 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 20:19:26,931 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 20:19:27,043 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 20:19:27,047 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 20:19:27,048 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 20:19:27,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:19:27 BoogieIcfgContainer [2023-02-15 20:19:27,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 20:19:27,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 20:19:27,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 20:19:27,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 20:19:27,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 08:19:26" (1/3) ... [2023-02-15 20:19:27,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a895ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:19:27, skipping insertion in model container [2023-02-15 20:19:27,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:19:26" (2/3) ... [2023-02-15 20:19:27,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a895ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:19:27, skipping insertion in model container [2023-02-15 20:19:27,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:19:27" (3/3) ... [2023-02-15 20:19:27,055 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2023-02-15 20:19:27,066 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 20:19:27,067 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 20:19:27,108 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 20:19:27,113 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;@6d7321bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 20:19:27,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 20:19:27,132 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 20:19:27,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 20:19:27,141 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:19:27,142 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:19:27,142 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:19:27,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:19:27,146 INFO L85 PathProgramCache]: Analyzing trace with hash 223354930, now seen corresponding path program 1 times [2023-02-15 20:19:27,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:19:27,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543135647] [2023-02-15 20:19:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:27,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:19:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:19:27,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:19:27,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543135647] [2023-02-15 20:19:27,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 20:19:27,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199526949] [2023-02-15 20:19:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:27,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:19:27,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:19:27,239 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:19:27,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 20:19:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:19:27,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 20:19:27,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:19:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 20:19:27,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:19:27,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199526949] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:19:27,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:19:27,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 20:19:27,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123448915] [2023-02-15 20:19:27,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:19:27,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 20:19:27,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:19:27,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 20:19:27,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 20:19:27,375 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-02-15 20:19:27,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:19:27,402 INFO L93 Difference]: Finished difference Result 61 states and 100 transitions. [2023-02-15 20:19:27,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 20:19:27,404 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 28 [2023-02-15 20:19:27,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:19:27,409 INFO L225 Difference]: With dead ends: 61 [2023-02-15 20:19:27,410 INFO L226 Difference]: Without dead ends: 28 [2023-02-15 20:19:27,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 20:19:27,416 INFO L413 NwaCegarLoop]: 41 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, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:19:27,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:19:27,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-15 20:19:27,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-15 20:19:27,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 20:19:27,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-15 20:19:27,446 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 28 [2023-02-15 20:19:27,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:19:27,447 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-15 20:19:27,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-02-15 20:19:27,447 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-15 20:19:27,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 20:19:27,449 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:19:27,450 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] [2023-02-15 20:19:27,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 20:19:27,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 20:19:27,654 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:19:27,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:19:27,655 INFO L85 PathProgramCache]: Analyzing trace with hash 727709964, now seen corresponding path program 1 times [2023-02-15 20:19:27,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:19:27,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828877763] [2023-02-15 20:19:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:27,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:19:27,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:19:27,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338692103] [2023-02-15 20:19:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:27,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:19:27,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:19:27,669 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:19:27,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 20:19:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:19:27,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 20:19:27,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:19:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:19:27,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:19:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:19:27,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:19:27,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828877763] [2023-02-15 20:19:27,952 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:19:27,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338692103] [2023-02-15 20:19:27,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338692103] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:19:27,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:19:27,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-02-15 20:19:27,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332548440] [2023-02-15 20:19:27,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:19:27,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 20:19:27,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:19:27,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 20:19:27,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 20:19:27,957 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:19:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:19:28,046 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2023-02-15 20:19:28,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:19:28,047 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-02-15 20:19:28,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:19:28,048 INFO L225 Difference]: With dead ends: 45 [2023-02-15 20:19:28,048 INFO L226 Difference]: Without dead ends: 37 [2023-02-15 20:19:28,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:19:28,049 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:19:28,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 99 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:19:28,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-15 20:19:28,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-02-15 20:19:28,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 20:19:28,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-02-15 20:19:28,055 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 29 [2023-02-15 20:19:28,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:19:28,055 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-02-15 20:19:28,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:19:28,056 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-02-15 20:19:28,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 20:19:28,056 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:19:28,056 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] [2023-02-15 20:19:28,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 20:19:28,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-15 20:19:28,261 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:19:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:19:28,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1088429638, now seen corresponding path program 1 times [2023-02-15 20:19:28,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:19:28,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13381459] [2023-02-15 20:19:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:28,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:19:28,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:19:28,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713803991] [2023-02-15 20:19:28,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:28,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:19:28,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:19:28,277 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:19:28,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 20:19:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:19:28,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 20:19:28,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:19:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:19:28,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:19:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 20:19:28,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:19:28,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13381459] [2023-02-15 20:19:28,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:19:28,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713803991] [2023-02-15 20:19:28,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713803991] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 20:19:28,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:19:28,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-02-15 20:19:28,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817019510] [2023-02-15 20:19:28,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:19:28,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:19:28,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:19:28,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:19:28,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-15 20:19:28,458 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:19:28,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:19:28,495 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2023-02-15 20:19:28,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:19:28,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2023-02-15 20:19:28,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:19:28,497 INFO L225 Difference]: With dead ends: 36 [2023-02-15 20:19:28,497 INFO L226 Difference]: Without dead ends: 34 [2023-02-15 20:19:28,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:19:28,498 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:19:28,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 100 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:19:28,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-15 20:19:28,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-02-15 20:19:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 20:19:28,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-02-15 20:19:28,507 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 30 [2023-02-15 20:19:28,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:19:28,507 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-02-15 20:19:28,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:19:28,507 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-02-15 20:19:28,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 20:19:28,509 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:19:28,509 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] [2023-02-15 20:19:28,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 20:19:28,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:19:28,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:19:28,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:19:28,716 INFO L85 PathProgramCache]: Analyzing trace with hash 161014808, now seen corresponding path program 1 times [2023-02-15 20:19:28,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:19:28,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783985741] [2023-02-15 20:19:28,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:28,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:19:28,725 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:19:28,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835803757] [2023-02-15 20:19:28,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:28,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:19:28,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:19:28,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:19:28,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 20:19:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:19:28,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 20:19:28,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:19:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:19:28,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:19:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 20:19:28,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:19:28,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783985741] [2023-02-15 20:19:28,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:19:28,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835803757] [2023-02-15 20:19:28,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835803757] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 20:19:28,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:19:28,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-02-15 20:19:28,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517897736] [2023-02-15 20:19:28,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:19:28,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:19:28,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:19:28,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:19:28,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-15 20:19:28,944 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 20:19:28,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:19:28,977 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2023-02-15 20:19:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:19:28,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2023-02-15 20:19:28,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:19:28,979 INFO L225 Difference]: With dead ends: 47 [2023-02-15 20:19:28,979 INFO L226 Difference]: Without dead ends: 45 [2023-02-15 20:19:28,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:19:28,980 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:19:28,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:19:28,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-15 20:19:28,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2023-02-15 20:19:28,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 20:19:28,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2023-02-15 20:19:28,988 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 35 [2023-02-15 20:19:28,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:19:28,988 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2023-02-15 20:19:28,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 20:19:28,988 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2023-02-15 20:19:28,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 20:19:28,989 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:19:28,989 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] [2023-02-15 20:19:28,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 20:19:29,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:19:29,196 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:19:29,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:19:29,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2062939834, now seen corresponding path program 1 times [2023-02-15 20:19:29,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:19:29,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898612988] [2023-02-15 20:19:29,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:29,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:19:29,204 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:19:29,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311222337] [2023-02-15 20:19:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:29,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:19:29,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:19:29,205 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:19:29,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 20:19:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:19:29,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 20:19:29,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:19:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 20:19:29,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:19:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 20:19:29,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:19:29,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898612988] [2023-02-15 20:19:29,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:19:29,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311222337] [2023-02-15 20:19:29,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311222337] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 20:19:29,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:19:29,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-15 20:19:29,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982148968] [2023-02-15 20:19:29,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:19:29,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:19:29,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:19:29,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:19:29,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:19:29,441 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-02-15 20:19:29,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:19:29,479 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2023-02-15 20:19:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:19:29,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 40 [2023-02-15 20:19:29,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:19:29,480 INFO L225 Difference]: With dead ends: 51 [2023-02-15 20:19:29,480 INFO L226 Difference]: Without dead ends: 49 [2023-02-15 20:19:29,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:19:29,481 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:19:29,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 115 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:19:29,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-15 20:19:29,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-02-15 20:19:29,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 20:19:29,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2023-02-15 20:19:29,489 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 40 [2023-02-15 20:19:29,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:19:29,489 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2023-02-15 20:19:29,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-02-15 20:19:29,490 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2023-02-15 20:19:29,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 20:19:29,490 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:19:29,490 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] [2023-02-15 20:19:29,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 20:19:29,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:19:29,697 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:19:29,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:19:29,700 INFO L85 PathProgramCache]: Analyzing trace with hash -98301800, now seen corresponding path program 1 times [2023-02-15 20:19:29,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:19:29,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947315397] [2023-02-15 20:19:29,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:29,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:19:29,718 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:19:29,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729618246] [2023-02-15 20:19:29,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:29,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:19:29,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:19:29,719 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:19:29,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 20:19:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:19:29,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 20:19:29,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:19:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 20:19:29,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:19:29,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:19:29,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947315397] [2023-02-15 20:19:29,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:19:29,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729618246] [2023-02-15 20:19:29,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729618246] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:19:29,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:19:29,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-02-15 20:19:29,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410034728] [2023-02-15 20:19:29,915 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:19:29,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 20:19:29,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:19:29,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 20:19:29,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-02-15 20:19:29,917 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 20:19:30,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:19:30,028 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2023-02-15 20:19:30,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 20:19:30,028 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2023-02-15 20:19:30,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:19:30,030 INFO L225 Difference]: With dead ends: 55 [2023-02-15 20:19:30,030 INFO L226 Difference]: Without dead ends: 53 [2023-02-15 20:19:30,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:19:30,031 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:19:30,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 112 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:19:30,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-15 20:19:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-02-15 20:19:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 20:19:30,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2023-02-15 20:19:30,050 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 45 [2023-02-15 20:19:30,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:19:30,050 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2023-02-15 20:19:30,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 20:19:30,050 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2023-02-15 20:19:30,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 20:19:30,051 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:19:30,051 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1] [2023-02-15 20:19:30,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 20:19:30,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:19:30,255 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:19:30,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:19:30,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1721617041, now seen corresponding path program 1 times [2023-02-15 20:19:30,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:19:30,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604256052] [2023-02-15 20:19:30,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:30,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:19:30,263 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:19:30,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192005141] [2023-02-15 20:19:30,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:30,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:19:30,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:19:30,273 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:19:30,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 20:19:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:19:30,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 20:19:30,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:19:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 20:19:30,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:19:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 20:19:30,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:19:30,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604256052] [2023-02-15 20:19:30,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:19:30,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192005141] [2023-02-15 20:19:30,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192005141] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:19:30,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:19:30,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-15 20:19:30,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776589122] [2023-02-15 20:19:30,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:19:30,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 20:19:30,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:19:30,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 20:19:30,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:19:30,410 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 20:19:30,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:19:30,531 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2023-02-15 20:19:30,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 20:19:30,532 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2023-02-15 20:19:30,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:19:30,532 INFO L225 Difference]: With dead ends: 99 [2023-02-15 20:19:30,533 INFO L226 Difference]: Without dead ends: 91 [2023-02-15 20:19:30,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:19:30,533 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 36 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:19:30,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 180 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:19:30,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-15 20:19:30,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2023-02-15 20:19:30,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 30 states have call successors, (30), 6 states have call predecessors, (30), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2023-02-15 20:19:30,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 113 transitions. [2023-02-15 20:19:30,555 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 113 transitions. Word has length 54 [2023-02-15 20:19:30,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:19:30,555 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 113 transitions. [2023-02-15 20:19:30,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 20:19:30,555 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 113 transitions. [2023-02-15 20:19:30,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 20:19:30,556 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:19:30,557 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2023-02-15 20:19:30,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 20:19:30,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:19:30,761 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:19:30,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:19:30,761 INFO L85 PathProgramCache]: Analyzing trace with hash -653850053, now seen corresponding path program 1 times [2023-02-15 20:19:30,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:19:30,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461891219] [2023-02-15 20:19:30,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:30,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:19:30,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:19:30,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414013183] [2023-02-15 20:19:30,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:30,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:19:30,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:19:30,777 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:19:30,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 20:19:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:19:30,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 20:19:30,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:19:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-15 20:19:30,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:19:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-15 20:19:31,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:19:31,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461891219] [2023-02-15 20:19:31,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:19:31,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414013183] [2023-02-15 20:19:31,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414013183] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:19:31,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:19:31,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-02-15 20:19:31,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696090003] [2023-02-15 20:19:31,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:19:31,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 20:19:31,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:19:31,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 20:19:31,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:19:31,008 INFO L87 Difference]: Start difference. First operand 82 states and 113 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-15 20:19:31,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:19:31,222 INFO L93 Difference]: Finished difference Result 125 states and 178 transitions. [2023-02-15 20:19:31,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 20:19:31,223 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2023-02-15 20:19:31,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:19:31,225 INFO L225 Difference]: With dead ends: 125 [2023-02-15 20:19:31,225 INFO L226 Difference]: Without dead ends: 121 [2023-02-15 20:19:31,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:19:31,226 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 32 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:19:31,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 150 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:19:31,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-15 20:19:31,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2023-02-15 20:19:31,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 32 states have call successors, (32), 7 states have call predecessors, (32), 7 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-15 20:19:31,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2023-02-15 20:19:31,245 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 60 [2023-02-15 20:19:31,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:19:31,245 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2023-02-15 20:19:31,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-15 20:19:31,246 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2023-02-15 20:19:31,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-15 20:19:31,246 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:19:31,246 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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] [2023-02-15 20:19:31,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 20:19:31,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-15 20:19:31,453 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:19:31,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:19:31,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1044201731, now seen corresponding path program 2 times [2023-02-15 20:19:31,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:19:31,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744054363] [2023-02-15 20:19:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:31,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:19:31,459 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:19:31,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511979258] [2023-02-15 20:19:31,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:19:31,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:19:31,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:19:31,461 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:19:31,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 20:19:31,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:19:31,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:19:31,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-15 20:19:31,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:19:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-15 20:19:31,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:19:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-02-15 20:19:32,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:19:32,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744054363] [2023-02-15 20:19:32,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:19:32,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511979258] [2023-02-15 20:19:32,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511979258] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:19:32,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:19:32,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2023-02-15 20:19:32,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833044132] [2023-02-15 20:19:32,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:19:32,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 20:19:32,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:19:32,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 20:19:32,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:19:32,033 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-15 20:19:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:19:34,841 INFO L93 Difference]: Finished difference Result 131 states and 176 transitions. [2023-02-15 20:19:34,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 20:19:34,842 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 65 [2023-02-15 20:19:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:19:34,843 INFO L225 Difference]: With dead ends: 131 [2023-02-15 20:19:34,843 INFO L226 Difference]: Without dead ends: 129 [2023-02-15 20:19:34,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2023-02-15 20:19:34,843 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 86 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-15 20:19:34,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 153 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-15 20:19:34,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-15 20:19:34,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2023-02-15 20:19:34,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 65 states have internal predecessors, (74), 36 states have call successors, (36), 10 states have call predecessors, (36), 10 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2023-02-15 20:19:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 145 transitions. [2023-02-15 20:19:34,861 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 145 transitions. Word has length 65 [2023-02-15 20:19:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:19:34,861 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 145 transitions. [2023-02-15 20:19:34,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-15 20:19:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 145 transitions. [2023-02-15 20:19:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-15 20:19:34,862 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:19:34,862 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2023-02-15 20:19:34,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-15 20:19:35,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:19:35,066 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:19:35,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:19:35,067 INFO L85 PathProgramCache]: Analyzing trace with hash 635379451, now seen corresponding path program 3 times [2023-02-15 20:19:35,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:19:35,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660688587] [2023-02-15 20:19:35,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:35,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:19:35,074 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:19:35,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482548600] [2023-02-15 20:19:35,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:19:35,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:19:35,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:19:35,076 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:19:35,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 20:19:35,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 20:19:35,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:19:35,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-15 20:19:35,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:19:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 40 proven. 8 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-02-15 20:19:35,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:19:35,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:19:35,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660688587] [2023-02-15 20:19:35,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:19:35,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482548600] [2023-02-15 20:19:35,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482548600] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:19:35,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:19:35,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-15 20:19:35,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431436491] [2023-02-15 20:19:35,820 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:19:35,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 20:19:35,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:19:35,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 20:19:35,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:19:35,821 INFO L87 Difference]: Start difference. First operand 110 states and 145 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-15 20:19:36,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:19:36,203 INFO L93 Difference]: Finished difference Result 146 states and 187 transitions. [2023-02-15 20:19:36,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 20:19:36,205 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2023-02-15 20:19:36,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:19:36,206 INFO L225 Difference]: With dead ends: 146 [2023-02-15 20:19:36,206 INFO L226 Difference]: Without dead ends: 144 [2023-02-15 20:19:36,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-02-15 20:19:36,207 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:19:36,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 136 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 20:19:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-15 20:19:36,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2023-02-15 20:19:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 84 states have internal predecessors, (95), 44 states have call successors, (44), 14 states have call predecessors, (44), 14 states have return successors, (43), 42 states have call predecessors, (43), 43 states have call successors, (43) [2023-02-15 20:19:36,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 182 transitions. [2023-02-15 20:19:36,229 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 182 transitions. Word has length 70 [2023-02-15 20:19:36,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:19:36,229 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 182 transitions. [2023-02-15 20:19:36,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-15 20:19:36,229 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 182 transitions. [2023-02-15 20:19:36,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-15 20:19:36,230 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:19:36,230 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2023-02-15 20:19:36,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 20:19:36,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 20:19:36,435 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:19:36,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:19:36,436 INFO L85 PathProgramCache]: Analyzing trace with hash -375209714, now seen corresponding path program 1 times [2023-02-15 20:19:36,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:19:36,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322478422] [2023-02-15 20:19:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:36,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:19:36,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:19:36,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29844787] [2023-02-15 20:19:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:36,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:19:36,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:19:36,455 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:19:36,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 20:19:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:19:36,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 20:19:36,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:19:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-02-15 20:19:36,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:19:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-02-15 20:19:37,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:19:37,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322478422] [2023-02-15 20:19:37,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:19:37,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29844787] [2023-02-15 20:19:37,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29844787] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:19:37,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:19:37,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-15 20:19:37,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106060768] [2023-02-15 20:19:37,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:19:37,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 20:19:37,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:19:37,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 20:19:37,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-02-15 20:19:37,492 INFO L87 Difference]: Start difference. First operand 141 states and 182 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-15 20:19:46,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:19:46,476 INFO L93 Difference]: Finished difference Result 231 states and 317 transitions. [2023-02-15 20:19:46,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 20:19:46,476 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 76 [2023-02-15 20:19:46,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:19:46,477 INFO L225 Difference]: With dead ends: 231 [2023-02-15 20:19:46,478 INFO L226 Difference]: Without dead ends: 223 [2023-02-15 20:19:46,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 20:19:46,479 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 92 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:19:46,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 359 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-02-15 20:19:46,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-02-15 20:19:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2023-02-15 20:19:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 121 states have (on average 1.1818181818181819) internal successors, (143), 123 states have internal predecessors, (143), 80 states have call successors, (80), 17 states have call predecessors, (80), 17 states have return successors, (79), 78 states have call predecessors, (79), 79 states have call successors, (79) [2023-02-15 20:19:46,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 302 transitions. [2023-02-15 20:19:46,527 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 302 transitions. Word has length 76 [2023-02-15 20:19:46,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:19:46,528 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 302 transitions. [2023-02-15 20:19:46,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-15 20:19:46,528 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 302 transitions. [2023-02-15 20:19:46,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-15 20:19:46,529 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:19:46,529 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:19:46,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 20:19:46,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 20:19:46,734 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:19:46,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:19:46,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1261079706, now seen corresponding path program 1 times [2023-02-15 20:19:46,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:19:46,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486812804] [2023-02-15 20:19:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:46,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:19:46,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:19:46,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544682618] [2023-02-15 20:19:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:46,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:19:46,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:19:46,741 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:19:46,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 20:19:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:19:46,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 20:19:46,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:19:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 51 proven. 28 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2023-02-15 20:19:47,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:19:48,930 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2023-02-15 20:19:48,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:19:48,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486812804] [2023-02-15 20:19:48,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:19:48,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544682618] [2023-02-15 20:19:48,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544682618] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:19:48,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:19:48,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-02-15 20:19:48,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195268479] [2023-02-15 20:19:48,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:19:48,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 20:19:48,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:19:48,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 20:19:48,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-02-15 20:19:48,932 INFO L87 Difference]: Start difference. First operand 219 states and 302 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-15 20:19:51,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:20:01,927 WARN L233 SmtUtils]: Spent 8.71s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 20:20:14,679 WARN L233 SmtUtils]: Spent 5.93s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 20:20:20,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:20:25,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:20:38,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:20:40,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:20:42,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:20:42,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:20:42,238 INFO L93 Difference]: Finished difference Result 351 states and 508 transitions. [2023-02-15 20:20:42,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-15 20:20:42,238 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 92 [2023-02-15 20:20:42,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:20:42,240 INFO L225 Difference]: With dead ends: 351 [2023-02-15 20:20:42,240 INFO L226 Difference]: Without dead ends: 349 [2023-02-15 20:20:42,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=418, Invalid=1562, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 20:20:42,242 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 97 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 122 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.6s IncrementalHoareTripleChecker+Time [2023-02-15 20:20:42,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 178 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1160 Invalid, 6 Unknown, 0 Unchecked, 24.6s Time] [2023-02-15 20:20:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-02-15 20:20:42,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 264. [2023-02-15 20:20:42,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 146 states have (on average 1.178082191780822) internal successors, (172), 151 states have internal predecessors, (172), 99 states have call successors, (99), 18 states have call predecessors, (99), 18 states have return successors, (98), 94 states have call predecessors, (98), 98 states have call successors, (98) [2023-02-15 20:20:42,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 369 transitions. [2023-02-15 20:20:42,335 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 369 transitions. Word has length 92 [2023-02-15 20:20:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:20:42,336 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 369 transitions. [2023-02-15 20:20:42,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-15 20:20:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 369 transitions. [2023-02-15 20:20:42,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-15 20:20:42,337 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:20:42,337 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:20:42,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 20:20:42,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 20:20:42,541 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:20:42,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:20:42,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1991503352, now seen corresponding path program 4 times [2023-02-15 20:20:42,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:20:42,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163953195] [2023-02-15 20:20:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:20:42,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:20:42,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:20:42,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934214469] [2023-02-15 20:20:42,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:20:42,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:20:42,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:20:42,550 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:20:42,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 20:20:42,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:20:42,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:20:42,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 20:20:42,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:20:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2023-02-15 20:20:42,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:20:42,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:20:42,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163953195] [2023-02-15 20:20:42,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:20:42,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934214469] [2023-02-15 20:20:42,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934214469] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:20:42,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:20:42,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 20:20:42,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150476673] [2023-02-15 20:20:42,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:20:42,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:20:42,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:20:42,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:20:42,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:20:42,629 INFO L87 Difference]: Start difference. First operand 264 states and 369 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-02-15 20:20:42,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:20:42,754 INFO L93 Difference]: Finished difference Result 347 states and 483 transitions. [2023-02-15 20:20:42,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:20:42,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 95 [2023-02-15 20:20:42,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:20:42,755 INFO L225 Difference]: With dead ends: 347 [2023-02-15 20:20:42,756 INFO L226 Difference]: Without dead ends: 233 [2023-02-15 20:20:42,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 20:20:42,757 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:20:42,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 125 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:20:42,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-15 20:20:42,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 216. [2023-02-15 20:20:42,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 121 states have (on average 1.1322314049586777) internal successors, (137), 124 states have internal predecessors, (137), 76 states have call successors, (76), 18 states have call predecessors, (76), 18 states have return successors, (75), 73 states have call predecessors, (75), 75 states have call successors, (75) [2023-02-15 20:20:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 288 transitions. [2023-02-15 20:20:42,831 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 288 transitions. Word has length 95 [2023-02-15 20:20:42,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:20:42,831 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 288 transitions. [2023-02-15 20:20:42,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-02-15 20:20:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 288 transitions. [2023-02-15 20:20:42,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-15 20:20:42,832 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:20:42,832 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:20:42,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 20:20:43,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 20:20:43,037 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:20:43,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:20:43,037 INFO L85 PathProgramCache]: Analyzing trace with hash 468383399, now seen corresponding path program 2 times [2023-02-15 20:20:43,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:20:43,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979447704] [2023-02-15 20:20:43,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:20:43,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:20:43,043 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:20:43,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921291166] [2023-02-15 20:20:43,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:20:43,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:20:43,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:20:43,044 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:20:43,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 20:20:43,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:20:43,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:20:43,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-15 20:20:43,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:20:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 69 proven. 44 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2023-02-15 20:20:43,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:20:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 69 proven. 35 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2023-02-15 20:20:44,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:20:44,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979447704] [2023-02-15 20:20:44,589 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:20:44,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921291166] [2023-02-15 20:20:44,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921291166] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:20:44,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:20:44,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 29 [2023-02-15 20:20:44,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832496137] [2023-02-15 20:20:44,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:20:44,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 20:20:44,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:20:44,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 20:20:44,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2023-02-15 20:20:44,591 INFO L87 Difference]: Start difference. First operand 216 states and 288 transitions. Second operand has 29 states, 27 states have (on average 1.962962962962963) internal successors, (53), 25 states have internal predecessors, (53), 13 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (35), 14 states have call predecessors, (35), 11 states have call successors, (35) [2023-02-15 20:20:50,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:20:50,743 INFO L93 Difference]: Finished difference Result 265 states and 355 transitions. [2023-02-15 20:20:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 20:20:50,744 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.962962962962963) internal successors, (53), 25 states have internal predecessors, (53), 13 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (35), 14 states have call predecessors, (35), 11 states have call successors, (35) Word has length 112 [2023-02-15 20:20:50,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:20:50,745 INFO L225 Difference]: With dead ends: 265 [2023-02-15 20:20:50,745 INFO L226 Difference]: Without dead ends: 263 [2023-02-15 20:20:50,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=472, Invalid=1978, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 20:20:50,746 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 111 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:20:50,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 220 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-02-15 20:20:50,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-02-15 20:20:50,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 260. [2023-02-15 20:20:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 144 states have (on average 1.1319444444444444) internal successors, (163), 149 states have internal predecessors, (163), 94 states have call successors, (94), 21 states have call predecessors, (94), 21 states have return successors, (93), 89 states have call predecessors, (93), 93 states have call successors, (93) [2023-02-15 20:20:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 350 transitions. [2023-02-15 20:20:50,855 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 350 transitions. Word has length 112 [2023-02-15 20:20:50,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:20:50,856 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 350 transitions. [2023-02-15 20:20:50,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.962962962962963) internal successors, (53), 25 states have internal predecessors, (53), 13 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (35), 14 states have call predecessors, (35), 11 states have call successors, (35) [2023-02-15 20:20:50,856 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 350 transitions. [2023-02-15 20:20:50,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-15 20:20:50,859 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:20:50,860 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:20:50,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-15 20:20:51,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:20:51,065 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:20:51,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:20:51,065 INFO L85 PathProgramCache]: Analyzing trace with hash 898620650, now seen corresponding path program 2 times [2023-02-15 20:20:51,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:20:51,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171217503] [2023-02-15 20:20:51,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:20:51,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:20:51,078 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:20:51,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765371434] [2023-02-15 20:20:51,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:20:51,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:20:51,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:20:51,080 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:20:51,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 20:20:51,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:20:51,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:20:51,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-15 20:20:51,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:20:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-02-15 20:20:51,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:20:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2023-02-15 20:20:53,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:20:53,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171217503] [2023-02-15 20:20:53,715 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:20:53,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765371434] [2023-02-15 20:20:53,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765371434] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:20:53,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:20:53,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-02-15 20:20:53,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285849777] [2023-02-15 20:20:53,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:20:53,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 20:20:53,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:20:53,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 20:20:53,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-02-15 20:20:53,717 INFO L87 Difference]: Start difference. First operand 260 states and 350 transitions. Second operand has 28 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) [2023-02-15 20:21:36,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:21:36,344 INFO L93 Difference]: Finished difference Result 390 states and 548 transitions. [2023-02-15 20:21:36,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-15 20:21:36,345 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) Word has length 123 [2023-02-15 20:21:36,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:21:36,346 INFO L225 Difference]: With dead ends: 390 [2023-02-15 20:21:36,346 INFO L226 Difference]: Without dead ends: 382 [2023-02-15 20:21:36,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=853, Invalid=4117, Unknown=0, NotChecked=0, Total=4970 [2023-02-15 20:21:36,348 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 218 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 2511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time [2023-02-15 20:21:36,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 682 Invalid, 2511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 21.9s Time] [2023-02-15 20:21:36,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-02-15 20:21:36,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 366. [2023-02-15 20:21:36,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 194 states have (on average 1.1546391752577319) internal successors, (224), 199 states have internal predecessors, (224), 146 states have call successors, (146), 25 states have call predecessors, (146), 25 states have return successors, (145), 141 states have call predecessors, (145), 145 states have call successors, (145) [2023-02-15 20:21:36,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 515 transitions. [2023-02-15 20:21:36,554 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 515 transitions. Word has length 123 [2023-02-15 20:21:36,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:21:36,554 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 515 transitions. [2023-02-15 20:21:36,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) [2023-02-15 20:21:36,555 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 515 transitions. [2023-02-15 20:21:36,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-02-15 20:21:36,556 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:21:36,556 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:21:36,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 20:21:36,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 20:21:36,764 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:21:36,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:21:36,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1501327478, now seen corresponding path program 3 times [2023-02-15 20:21:36,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:21:36,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670441569] [2023-02-15 20:21:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:21:36,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:21:36,780 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:21:36,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644933937] [2023-02-15 20:21:36,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:21:36,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:21:36,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:21:36,781 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:21:36,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 20:21:37,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 20:21:37,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:21:37,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-15 20:21:37,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:21:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 112 proven. 46 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2023-02-15 20:21:43,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:21:44,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:21:44,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670441569] [2023-02-15 20:21:44,682 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:21:44,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644933937] [2023-02-15 20:21:44,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644933937] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:21:44,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:21:44,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-02-15 20:21:44,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797200406] [2023-02-15 20:21:44,682 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:21:44,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 20:21:44,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:21:44,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 20:21:44,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2023-02-15 20:21:44,683 INFO L87 Difference]: Start difference. First operand 366 states and 515 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2023-02-15 20:21:46,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:21:46,681 INFO L93 Difference]: Finished difference Result 407 states and 568 transitions. [2023-02-15 20:21:46,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 20:21:46,681 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 139 [2023-02-15 20:21:46,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:21:46,683 INFO L225 Difference]: With dead ends: 407 [2023-02-15 20:21:46,683 INFO L226 Difference]: Without dead ends: 405 [2023-02-15 20:21:46,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2023-02-15 20:21:46,684 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 36 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:21:46,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 200 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 20:21:46,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2023-02-15 20:21:46,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 402. [2023-02-15 20:21:46,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 215 states have (on average 1.1534883720930234) internal successors, (248), 220 states have internal predecessors, (248), 158 states have call successors, (158), 28 states have call predecessors, (158), 28 states have return successors, (157), 153 states have call predecessors, (157), 157 states have call successors, (157) [2023-02-15 20:21:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 563 transitions. [2023-02-15 20:21:46,914 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 563 transitions. Word has length 139 [2023-02-15 20:21:46,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:21:46,915 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 563 transitions. [2023-02-15 20:21:46,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2023-02-15 20:21:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 563 transitions. [2023-02-15 20:21:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-02-15 20:21:46,917 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:21:46,917 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:21:46,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 20:21:47,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-15 20:21:47,117 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:21:47,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:21:47,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1673937813, now seen corresponding path program 3 times [2023-02-15 20:21:47,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:21:47,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296728766] [2023-02-15 20:21:47,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:21:47,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:21:47,123 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:21:47,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307147998] [2023-02-15 20:21:47,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:21:47,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:21:47,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:21:47,125 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:21:47,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 20:21:47,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 20:21:47,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:21:47,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 20:21:47,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:21:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 93 proven. 31 refuted. 0 times theorem prover too weak. 762 trivial. 0 not checked. [2023-02-15 20:21:47,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:21:47,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:21:47,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296728766] [2023-02-15 20:21:47,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:21:47,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307147998] [2023-02-15 20:21:47,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307147998] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:21:47,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:21:47,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-15 20:21:47,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392160649] [2023-02-15 20:21:47,689 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:21:47,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 20:21:47,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:21:47,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 20:21:47,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2023-02-15 20:21:47,690 INFO L87 Difference]: Start difference. First operand 402 states and 563 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-15 20:21:48,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:21:48,170 INFO L93 Difference]: Finished difference Result 429 states and 599 transitions. [2023-02-15 20:21:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 20:21:48,171 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 142 [2023-02-15 20:21:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:21:48,172 INFO L225 Difference]: With dead ends: 429 [2023-02-15 20:21:48,173 INFO L226 Difference]: Without dead ends: 422 [2023-02-15 20:21:48,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-02-15 20:21:48,174 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:21:48,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 139 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:21:48,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-02-15 20:21:48,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 405. [2023-02-15 20:21:48,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 216 states have (on average 1.1481481481481481) internal successors, (248), 220 states have internal predecessors, (248), 159 states have call successors, (159), 29 states have call predecessors, (159), 29 states have return successors, (158), 155 states have call predecessors, (158), 158 states have call successors, (158) [2023-02-15 20:21:48,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 565 transitions. [2023-02-15 20:21:48,410 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 565 transitions. Word has length 142 [2023-02-15 20:21:48,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:21:48,410 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 565 transitions. [2023-02-15 20:21:48,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-15 20:21:48,411 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 565 transitions. [2023-02-15 20:21:48,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-02-15 20:21:48,412 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:21:48,412 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:21:48,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 20:21:48,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 20:21:48,622 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:21:48,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:21:48,622 INFO L85 PathProgramCache]: Analyzing trace with hash -428170169, now seen corresponding path program 4 times [2023-02-15 20:21:48,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:21:48,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054118372] [2023-02-15 20:21:48,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:21:48,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:21:48,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:21:48,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401249833] [2023-02-15 20:21:48,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:21:48,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:21:48,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:21:48,630 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:21:48,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 20:21:48,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:21:48,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:21:48,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 81 conjunts are in the unsatisfiable core [2023-02-15 20:21:48,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:21:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 150 proven. 110 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2023-02-15 20:21:50,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:21:51,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:21:51,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054118372] [2023-02-15 20:21:51,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:21:51,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401249833] [2023-02-15 20:21:51,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401249833] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:21:51,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:21:51,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-15 20:21:51,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613075569] [2023-02-15 20:21:51,368 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:21:51,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 20:21:51,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:21:51,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 20:21:51,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=501, Unknown=1, NotChecked=0, Total=600 [2023-02-15 20:21:51,369 INFO L87 Difference]: Start difference. First operand 405 states and 565 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-02-15 20:21:53,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:21:53,810 INFO L93 Difference]: Finished difference Result 443 states and 613 transitions. [2023-02-15 20:21:53,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 20:21:53,817 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 156 [2023-02-15 20:21:53,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:21:53,819 INFO L225 Difference]: With dead ends: 443 [2023-02-15 20:21:53,819 INFO L226 Difference]: Without dead ends: 441 [2023-02-15 20:21:53,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=184, Invalid=1005, Unknown=1, NotChecked=0, Total=1190 [2023-02-15 20:21:53,820 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 51 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-15 20:21:53,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 252 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-15 20:21:53,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-02-15 20:21:54,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 410. [2023-02-15 20:21:54,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 219 states have (on average 1.1461187214611872) internal successors, (251), 223 states have internal predecessors, (251), 159 states have call successors, (159), 31 states have call predecessors, (159), 31 states have return successors, (158), 155 states have call predecessors, (158), 158 states have call successors, (158) [2023-02-15 20:21:54,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 568 transitions. [2023-02-15 20:21:54,057 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 568 transitions. Word has length 156 [2023-02-15 20:21:54,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:21:54,057 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 568 transitions. [2023-02-15 20:21:54,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-02-15 20:21:54,057 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 568 transitions. [2023-02-15 20:21:54,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-02-15 20:21:54,059 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:21:54,059 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:21:54,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 20:21:54,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 20:21:54,263 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:21:54,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:21:54,264 INFO L85 PathProgramCache]: Analyzing trace with hash 194788219, now seen corresponding path program 5 times [2023-02-15 20:21:54,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:21:54,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079875264] [2023-02-15 20:21:54,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:21:54,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:21:54,270 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:21:54,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981973453] [2023-02-15 20:21:54,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:21:54,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:21:54,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:21:54,271 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:21:54,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 20:21:54,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-15 20:21:54,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:21:54,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 110 conjunts are in the unsatisfiable core [2023-02-15 20:21:54,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:21:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 188 proven. 228 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2023-02-15 20:21:56,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:22:09,623 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_179| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_301| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_234| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_163| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_277| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_300| Int) (|v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_108| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_275| Int) (|v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_127| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_234| Int)) (let ((.cse5 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_300| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_300| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_275|)) (.cse6 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_301| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_277| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_300|)) (.cse4 (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_163| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_300| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_300| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_275|)) (.cse10 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_301| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_234|)) (.cse7 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_301| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_163| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_277| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_300|)) (.cse11 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_300| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_234|)) (.cse8 (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_163| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_300| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_275|)) (.cse0 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_301| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_234| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_300|)) (.cse9 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_301| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_163| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_277|)) (.cse2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_300| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_300| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_234|)) (.cse3 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_277| |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_127|)) (.cse1 (* |v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_108| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_275|))) (or (= (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_163| |v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_108| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_275|) .cse0 .cse1 (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_163| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_277| |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_127|) .cse2 .cse3) (+ (* |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_234| |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_127|) .cse4 .cse5 .cse6 (* |v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_108| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_234|) .cse7)) (= (+ |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_179| .cse8 .cse9) (+ .cse10 .cse11)) (<= (+ |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_179| (* .cse8 2) (* (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_300| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_275|) 2) (* (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_301| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_277|) 2) (* .cse9 2)) (+ (* .cse10 2) (* .cse11 2))) (not (= (+ .cse5 .cse6 .cse4 .cse10 .cse7 .cse11 (* |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_179| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_300|)) (+ |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_179| .cse8 .cse0 .cse9 .cse2 .cse3 .cse1))))))) is different from true [2023-02-15 20:22:46,750 WARN L233 SmtUtils]: Spent 7.66s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)