./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.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-scaling/egcd3-ll_valuebound100.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 c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 20:46:23,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 20:46:23,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 20:46:23,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 20:46:23,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 20:46:23,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 20:46:23,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 20:46:23,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 20:46:23,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 20:46:23,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 20:46:23,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 20:46:23,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 20:46:23,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 20:46:23,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 20:46:23,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 20:46:23,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 20:46:23,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 20:46:23,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 20:46:23,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 20:46:23,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 20:46:23,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 20:46:23,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 20:46:23,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 20:46:23,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 20:46:23,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 20:46:23,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 20:46:23,930 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 20:46:23,931 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 20:46:23,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 20:46:23,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 20:46:23,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 20:46:23,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 20:46:23,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 20:46:23,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 20:46:23,937 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 20:46:23,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 20:46:23,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 20:46:23,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 20:46:23,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 20:46:23,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 20:46:23,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 20:46:23,942 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 20:46:23,970 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 20:46:23,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 20:46:23,971 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 20:46:23,971 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 20:46:23,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 20:46:23,972 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 20:46:23,972 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 20:46:23,972 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 20:46:23,973 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 20:46:23,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 20:46:23,974 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 20:46:23,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 20:46:23,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 20:46:23,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 20:46:23,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 20:46:23,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 20:46:23,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 20:46:23,975 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 20:46:23,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 20:46:23,975 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 20:46:23,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 20:46:23,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 20:46:23,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 20:46:23,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 20:46:23,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:46:23,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 20:46:23,976 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 20:46:23,976 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 20:46:23,977 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 20:46:23,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 20:46:23,977 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 20:46:23,977 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 20:46:23,978 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 20:46:23,978 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 20:46:23,978 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 20:46:23,978 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e [2023-02-15 20:46:24,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 20:46:24,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 20:46:24,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 20:46:24,217 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 20:46:24,218 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 20:46:24,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2023-02-15 20:46:25,354 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 20:46:25,519 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 20:46:25,519 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2023-02-15 20:46:25,525 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17a4fbc32/18b70a04c6584a458fd0b34840254b2d/FLAGd42c2c44a [2023-02-15 20:46:25,543 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17a4fbc32/18b70a04c6584a458fd0b34840254b2d [2023-02-15 20:46:25,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 20:46:25,547 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 20:46:25,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 20:46:25,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 20:46:25,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 20:46:25,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:46:25" (1/1) ... [2023-02-15 20:46:25,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31f46765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:46:25, skipping insertion in model container [2023-02-15 20:46:25,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:46:25" (1/1) ... [2023-02-15 20:46:25,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 20:46:25,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 20:46:25,713 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2023-02-15 20:46:25,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:46:25,745 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 20:46:25,753 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2023-02-15 20:46:25,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:46:25,769 INFO L208 MainTranslator]: Completed translation [2023-02-15 20:46:25,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:46:25 WrapperNode [2023-02-15 20:46:25,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 20:46:25,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 20:46:25,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 20:46:25,771 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 20:46:25,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:46:25" (1/1) ... [2023-02-15 20:46:25,780 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:46:25" (1/1) ... [2023-02-15 20:46:25,794 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2023-02-15 20:46:25,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 20:46:25,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 20:46:25,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 20:46:25,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 20:46:25,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:46:25" (1/1) ... [2023-02-15 20:46:25,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:46:25" (1/1) ... [2023-02-15 20:46:25,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:46:25" (1/1) ... [2023-02-15 20:46:25,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:46:25" (1/1) ... [2023-02-15 20:46:25,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:46:25" (1/1) ... [2023-02-15 20:46:25,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:46:25" (1/1) ... [2023-02-15 20:46:25,809 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:46:25" (1/1) ... [2023-02-15 20:46:25,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:46:25" (1/1) ... [2023-02-15 20:46:25,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 20:46:25,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 20:46:25,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 20:46:25,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 20:46:25,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:46:25" (1/1) ... [2023-02-15 20:46:25,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:46:25,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:46:25,842 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 20:46:25,843 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 20:46:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 20:46:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 20:46:25,869 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 20:46:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 20:46:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 20:46:25,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 20:46:25,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 20:46:25,880 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 20:46:25,931 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 20:46:25,934 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 20:46:26,055 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 20:46:26,060 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 20:46:26,060 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 20:46:26,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:46:26 BoogieIcfgContainer [2023-02-15 20:46:26,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 20:46:26,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 20:46:26,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 20:46:26,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 20:46:26,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 08:46:25" (1/3) ... [2023-02-15 20:46:26,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ee92ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:46:26, skipping insertion in model container [2023-02-15 20:46:26,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:46:25" (2/3) ... [2023-02-15 20:46:26,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ee92ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:46:26, skipping insertion in model container [2023-02-15 20:46:26,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:46:26" (3/3) ... [2023-02-15 20:46:26,069 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.c [2023-02-15 20:46:26,084 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 20:46:26,084 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 20:46:26,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 20:46:26,128 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;@4245714a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 20:46:26,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 20:46:26,131 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 20:46:26,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 20:46:26,137 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:46:26,138 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 20:46:26,138 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:46:26,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:46:26,142 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2023-02-15 20:46:26,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:46:26,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518943127] [2023-02-15 20:46:26,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:26,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:46:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:46:26,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:46:26,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518943127] [2023-02-15 20:46:26,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 20:46:26,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414554799] [2023-02-15 20:46:26,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:26,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:26,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:46:26,324 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 20:46:26,328 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 20:46:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:46:26,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 20:46:26,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:46:26,466 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 20:46:26,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:46:26,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414554799] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:46:26,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:46:26,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 20:46:26,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259910384] [2023-02-15 20:46:26,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:46:26,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 20:46:26,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:46:26,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 20:46:26,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 20:46:26,533 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:46:26,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:46:26,560 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2023-02-15 20:46:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 20:46:26,562 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-02-15 20:46:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:46:26,566 INFO L225 Difference]: With dead ends: 67 [2023-02-15 20:46:26,566 INFO L226 Difference]: Without dead ends: 31 [2023-02-15 20:46:26,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 20:46:26,571 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:46:26,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:46:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-15 20:46:26,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-15 20:46:26,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 20:46:26,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2023-02-15 20:46:26,601 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2023-02-15 20:46:26,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:46:26,602 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2023-02-15 20:46:26,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:46:26,603 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2023-02-15 20:46:26,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 20:46:26,606 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:46:26,607 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 20:46:26,612 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 20:46:26,812 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 20:46:26,813 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:46:26,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:46:26,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2023-02-15 20:46:26,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:46:26,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272543889] [2023-02-15 20:46:26,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:26,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:46:26,850 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:46:26,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078024358] [2023-02-15 20:46:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:26,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:26,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:46:26,853 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 20:46:26,857 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 20:46:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:46:26,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 20:46:26,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:46:27,024 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:46:27,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:46:27,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:46:27,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272543889] [2023-02-15 20:46:27,026 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:46:27,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078024358] [2023-02-15 20:46:27,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078024358] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:46:27,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:46:27,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 20:46:27,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969743090] [2023-02-15 20:46:27,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:46:27,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 20:46:27,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:46:27,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 20:46:27,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 20:46:27,029 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:46:27,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:46:27,119 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2023-02-15 20:46:27,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:46:27,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2023-02-15 20:46:27,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:46:27,121 INFO L225 Difference]: With dead ends: 50 [2023-02-15 20:46:27,121 INFO L226 Difference]: Without dead ends: 43 [2023-02-15 20:46:27,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-15 20:46:27,122 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:46:27,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 113 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:46:27,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-15 20:46:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2023-02-15 20:46:27,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 20:46:27,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-02-15 20:46:27,139 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2023-02-15 20:46:27,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:46:27,140 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-02-15 20:46:27,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:46:27,140 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-02-15 20:46:27,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 20:46:27,142 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:46:27,142 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:46:27,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 20:46:27,347 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 20:46:27,347 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:46:27,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:46:27,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2023-02-15 20:46:27,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:46:27,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447347711] [2023-02-15 20:46:27,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:27,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:46:27,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:46:27,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910172239] [2023-02-15 20:46:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:27,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:27,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:46:27,366 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 20:46:27,392 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 20:46:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:46:27,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 20:46:27,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:46:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:46:27,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:46:27,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:46:27,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447347711] [2023-02-15 20:46:27,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:46:27,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910172239] [2023-02-15 20:46:27,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910172239] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:46:27,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:46:27,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 20:46:27,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435246728] [2023-02-15 20:46:27,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:46:27,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 20:46:27,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:46:27,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 20:46:27,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-15 20:46:27,570 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:46:27,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:46:27,679 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2023-02-15 20:46:27,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 20:46:27,680 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2023-02-15 20:46:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:46:27,684 INFO L225 Difference]: With dead ends: 49 [2023-02-15 20:46:27,684 INFO L226 Difference]: Without dead ends: 47 [2023-02-15 20:46:27,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:46:27,687 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:46:27,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 161 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:46:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-15 20:46:27,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-02-15 20:46:27,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-15 20:46:27,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-02-15 20:46:27,715 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2023-02-15 20:46:27,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:46:27,716 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-02-15 20:46:27,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 20:46:27,716 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-02-15 20:46:27,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 20:46:27,717 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:46:27,717 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 20:46:27,722 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 20:46:27,921 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 20:46:27,921 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:46:27,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:46:27,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2023-02-15 20:46:27,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:46:27,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262299639] [2023-02-15 20:46:27,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:27,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:46:27,937 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:46:27,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091522946] [2023-02-15 20:46:27,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:27,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:27,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:46:27,939 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 20:46:27,941 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 20:46:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:46:27,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 20:46:27,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:46:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:46:28,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:46:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:46:28,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:46:28,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262299639] [2023-02-15 20:46:28,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:46:28,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091522946] [2023-02-15 20:46:28,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091522946] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:46:28,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:46:28,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-15 20:46:28,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693567947] [2023-02-15 20:46:28,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:46:28,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 20:46:28,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:46:28,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 20:46:28,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:46:28,172 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:46:28,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:46:28,376 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2023-02-15 20:46:28,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 20:46:28,377 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-02-15 20:46:28,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:46:28,378 INFO L225 Difference]: With dead ends: 99 [2023-02-15 20:46:28,379 INFO L226 Difference]: Without dead ends: 92 [2023-02-15 20:46:28,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:46:28,380 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 61 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:46:28,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 242 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:46:28,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-15 20:46:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2023-02-15 20:46:28,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-15 20:46:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2023-02-15 20:46:28,394 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2023-02-15 20:46:28,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:46:28,394 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2023-02-15 20:46:28,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 20:46:28,394 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2023-02-15 20:46:28,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-15 20:46:28,395 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:46:28,395 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:46:28,405 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 20:46:28,601 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 20:46:28,601 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:46:28,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:46:28,602 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2023-02-15 20:46:28,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:46:28,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309905051] [2023-02-15 20:46:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:28,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:46:28,619 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:46:28,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185839255] [2023-02-15 20:46:28,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:28,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:28,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:46:28,622 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 20:46:28,624 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 20:46:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:46:28,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 20:46:28,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:46:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 20:46:28,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:46:28,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:46:28,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309905051] [2023-02-15 20:46:28,825 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:46:28,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185839255] [2023-02-15 20:46:28,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185839255] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:46:28,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:46:28,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-15 20:46:28,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670129007] [2023-02-15 20:46:28,826 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:46:28,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 20:46:28,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:46:28,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 20:46:28,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:46:28,828 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 20:46:28,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:46:28,920 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2023-02-15 20:46:28,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 20:46:28,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-02-15 20:46:28,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:46:28,922 INFO L225 Difference]: With dead ends: 75 [2023-02-15 20:46:28,922 INFO L226 Difference]: Without dead ends: 73 [2023-02-15 20:46:28,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-15 20:46:28,933 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:46:28,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 145 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:46:28,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-15 20:46:28,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2023-02-15 20:46:28,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-15 20:46:28,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2023-02-15 20:46:28,960 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2023-02-15 20:46:28,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:46:28,961 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2023-02-15 20:46:28,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 20:46:28,961 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2023-02-15 20:46:28,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-15 20:46:28,968 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:46:28,969 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:46:28,976 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 20:46:29,174 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 20:46:29,174 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:46:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:46:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2023-02-15 20:46:29,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:46:29,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672225413] [2023-02-15 20:46:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:29,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:46:29,187 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:46:29,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992867410] [2023-02-15 20:46:29,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:29,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:29,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:46:29,189 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 20:46:29,202 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 20:46:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:46:29,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-15 20:46:29,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:46:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 20:46:29,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:46:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 20:46:29,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:46:29,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672225413] [2023-02-15 20:46:29,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:46:29,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992867410] [2023-02-15 20:46:29,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992867410] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:46:29,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:46:29,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2023-02-15 20:46:29,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108542503] [2023-02-15 20:46:29,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:46:29,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 20:46:29,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:46:29,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 20:46:29,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:46:29,756 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 20:46:30,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:46:30,239 INFO L93 Difference]: Finished difference Result 114 states and 155 transitions. [2023-02-15 20:46:30,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 20:46:30,240 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 38 [2023-02-15 20:46:30,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:46:30,241 INFO L225 Difference]: With dead ends: 114 [2023-02-15 20:46:30,241 INFO L226 Difference]: Without dead ends: 112 [2023-02-15 20:46:30,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-02-15 20:46:30,242 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 96 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:46:30,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 312 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 20:46:30,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-15 20:46:30,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 101. [2023-02-15 20:46:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-15 20:46:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2023-02-15 20:46:30,270 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 38 [2023-02-15 20:46:30,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:46:30,270 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2023-02-15 20:46:30,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 20:46:30,272 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2023-02-15 20:46:30,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 20:46:30,273 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:46:30,274 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:46:30,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 20:46:30,481 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 20:46:30,481 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:46:30,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:46:30,482 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2023-02-15 20:46:30,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:46:30,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640585081] [2023-02-15 20:46:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:30,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:46:30,497 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:46:30,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112325016] [2023-02-15 20:46:30,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:30,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:30,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:46:30,499 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 20:46:30,521 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 20:46:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:46:30,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 20:46:30,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:46:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 20:46:31,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:46:33,758 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 20:46:33,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:46:33,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640585081] [2023-02-15 20:46:33,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:46:33,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112325016] [2023-02-15 20:46:33,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112325016] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 20:46:33,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:46:33,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 15 [2023-02-15 20:46:33,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410311106] [2023-02-15 20:46:33,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:46:33,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 20:46:33,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:46:33,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 20:46:33,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=171, Unknown=1, NotChecked=0, Total=210 [2023-02-15 20:46:33,760 INFO L87 Difference]: Start difference. First operand 101 states and 137 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 20:46:33,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:46:33,840 INFO L93 Difference]: Finished difference Result 147 states and 209 transitions. [2023-02-15 20:46:33,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:46:33,841 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2023-02-15 20:46:33,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:46:33,842 INFO L225 Difference]: With dead ends: 147 [2023-02-15 20:46:33,843 INFO L226 Difference]: Without dead ends: 145 [2023-02-15 20:46:33,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=42, Invalid=197, Unknown=1, NotChecked=0, Total=240 [2023-02-15 20:46:33,844 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:46:33,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 150 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:46:33,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-02-15 20:46:33,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2023-02-15 20:46:33,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 88 states have internal predecessors, (112), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-02-15 20:46:33,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 201 transitions. [2023-02-15 20:46:33,885 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 201 transitions. Word has length 43 [2023-02-15 20:46:33,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:46:33,886 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 201 transitions. [2023-02-15 20:46:33,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 20:46:33,887 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 201 transitions. [2023-02-15 20:46:33,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 20:46:33,888 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:46:33,888 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:46:33,899 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 20:46:34,099 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 20:46:34,100 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:46:34,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:46:34,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2023-02-15 20:46:34,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:46:34,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304217090] [2023-02-15 20:46:34,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:34,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:46:34,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:46:34,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317342700] [2023-02-15 20:46:34,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:34,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:34,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:46:34,121 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 20:46:34,123 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 20:46:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:46:34,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 20:46:34,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:46:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 20:46:34,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:46:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 20:46:34,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:46:34,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304217090] [2023-02-15 20:46:34,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:46:34,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317342700] [2023-02-15 20:46:34,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317342700] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:46:34,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:46:34,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-02-15 20:46:34,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886869516] [2023-02-15 20:46:34,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:46:34,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 20:46:34,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:46:34,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 20:46:34,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:46:34,429 INFO L87 Difference]: Start difference. First operand 139 states and 201 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 20:46:37,097 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 [1] [2023-02-15 20:46:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:46:37,244 INFO L93 Difference]: Finished difference Result 198 states and 280 transitions. [2023-02-15 20:46:37,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 20:46:37,245 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2023-02-15 20:46:37,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:46:37,254 INFO L225 Difference]: With dead ends: 198 [2023-02-15 20:46:37,254 INFO L226 Difference]: Without dead ends: 196 [2023-02-15 20:46:37,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-02-15 20:46:37,256 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 101 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 101 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-15 20:46:37,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 169 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 389 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2023-02-15 20:46:37,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-02-15 20:46:37,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 187. [2023-02-15 20:46:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 117 states have (on average 1.264957264957265) internal successors, (148), 123 states have internal predecessors, (148), 61 states have call successors, (61), 8 states have call predecessors, (61), 8 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2023-02-15 20:46:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 269 transitions. [2023-02-15 20:46:37,321 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 269 transitions. Word has length 43 [2023-02-15 20:46:37,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:46:37,322 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 269 transitions. [2023-02-15 20:46:37,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 20:46:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 269 transitions. [2023-02-15 20:46:37,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 20:46:37,325 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:46:37,325 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:46:37,335 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 20:46:37,535 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 20:46:37,535 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:46:37,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:46:37,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2023-02-15 20:46:37,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:46:37,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053108347] [2023-02-15 20:46:37,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:37,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:46:37,554 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:46:37,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891101481] [2023-02-15 20:46:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:37,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:37,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:46:37,557 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 20:46:37,559 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 20:46:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:46:37,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 20:46:37,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:46:37,659 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 20:46:37,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:46:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 20:46:37,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:46:37,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053108347] [2023-02-15 20:46:37,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:46:37,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891101481] [2023-02-15 20:46:37,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891101481] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 20:46:37,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:46:37,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-02-15 20:46:37,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384441593] [2023-02-15 20:46:37,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:46:37,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:46:37,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:46:37,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:46:37,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:46:37,730 INFO L87 Difference]: Start difference. First operand 187 states and 269 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 20:46:37,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:46:37,817 INFO L93 Difference]: Finished difference Result 194 states and 275 transitions. [2023-02-15 20:46:37,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:46:37,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2023-02-15 20:46:37,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:46:37,821 INFO L225 Difference]: With dead ends: 194 [2023-02-15 20:46:37,821 INFO L226 Difference]: Without dead ends: 192 [2023-02-15 20:46:37,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:46:37,823 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:46:37,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:46:37,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-02-15 20:46:37,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2023-02-15 20:46:37,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 120 states have (on average 1.2583333333333333) internal successors, (151), 126 states have internal predecessors, (151), 61 states have call successors, (61), 9 states have call predecessors, (61), 9 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2023-02-15 20:46:37,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 272 transitions. [2023-02-15 20:46:37,875 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 272 transitions. Word has length 48 [2023-02-15 20:46:37,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:46:37,876 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 272 transitions. [2023-02-15 20:46:37,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 20:46:37,876 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 272 transitions. [2023-02-15 20:46:37,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 20:46:37,877 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:46:37,877 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:46:37,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 20:46:38,082 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 20:46:38,082 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:46:38,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:46:38,083 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2023-02-15 20:46:38,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:46:38,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875768687] [2023-02-15 20:46:38,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:38,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:46:38,092 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:46:38,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022129848] [2023-02-15 20:46:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:38,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:38,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:46:38,094 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 20:46:38,119 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 20:46:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:46:38,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-15 20:46:38,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:46:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 20:46:38,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:46:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 20:46:39,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:46:39,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875768687] [2023-02-15 20:46:39,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:46:39,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022129848] [2023-02-15 20:46:39,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022129848] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:46:39,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:46:39,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-02-15 20:46:39,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963351488] [2023-02-15 20:46:39,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:46:39,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 20:46:39,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:46:39,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 20:46:39,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-02-15 20:46:39,853 INFO L87 Difference]: Start difference. First operand 191 states and 272 transitions. Second operand has 26 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-15 20:46:49,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:46:49,891 INFO L93 Difference]: Finished difference Result 471 states and 681 transitions. [2023-02-15 20:46:49,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-15 20:46:49,891 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 60 [2023-02-15 20:46:49,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:46:49,893 INFO L225 Difference]: With dead ends: 471 [2023-02-15 20:46:49,894 INFO L226 Difference]: Without dead ends: 366 [2023-02-15 20:46:49,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=523, Invalid=2447, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 20:46:49,896 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 152 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-02-15 20:46:49,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 306 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-02-15 20:46:49,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2023-02-15 20:46:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 304. [2023-02-15 20:46:49,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 198 states have (on average 1.2474747474747474) internal successors, (247), 203 states have internal predecessors, (247), 91 states have call successors, (91), 14 states have call predecessors, (91), 14 states have return successors, (90), 86 states have call predecessors, (90), 90 states have call successors, (90) [2023-02-15 20:46:50,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 428 transitions. [2023-02-15 20:46:50,001 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 428 transitions. Word has length 60 [2023-02-15 20:46:50,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:46:50,002 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 428 transitions. [2023-02-15 20:46:50,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-15 20:46:50,002 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 428 transitions. [2023-02-15 20:46:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-15 20:46:50,003 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:46:50,003 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:46:50,013 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 20:46:50,208 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 20:46:50,208 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:46:50,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:46:50,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1726486837, now seen corresponding path program 1 times [2023-02-15 20:46:50,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:46:50,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425792397] [2023-02-15 20:46:50,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:50,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:46:50,217 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:46:50,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241358116] [2023-02-15 20:46:50,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:50,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:50,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:46:50,220 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 20:46:50,222 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 20:46:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:46:50,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 20:46:50,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:46:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 20:46:50,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:46:50,365 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 20:46:50,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:46:50,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425792397] [2023-02-15 20:46:50,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:46:50,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241358116] [2023-02-15 20:46:50,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241358116] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:46:50,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:46:50,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-02-15 20:46:50,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790583660] [2023-02-15 20:46:50,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:46:50,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 20:46:50,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:46:50,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 20:46:50,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-02-15 20:46:50,367 INFO L87 Difference]: Start difference. First operand 304 states and 428 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-15 20:46:50,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:46:50,762 INFO L93 Difference]: Finished difference Result 501 states and 711 transitions. [2023-02-15 20:46:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 20:46:50,762 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 68 [2023-02-15 20:46:50,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:46:50,765 INFO L225 Difference]: With dead ends: 501 [2023-02-15 20:46:50,765 INFO L226 Difference]: Without dead ends: 292 [2023-02-15 20:46:50,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2023-02-15 20:46:50,767 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 49 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:46:50,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 258 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:46:50,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-02-15 20:46:50,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 239. [2023-02-15 20:46:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 150 states have (on average 1.18) internal successors, (177), 152 states have internal predecessors, (177), 75 states have call successors, (75), 13 states have call predecessors, (75), 13 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2023-02-15 20:46:50,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 326 transitions. [2023-02-15 20:46:50,856 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 326 transitions. Word has length 68 [2023-02-15 20:46:50,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:46:50,857 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 326 transitions. [2023-02-15 20:46:50,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-15 20:46:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 326 transitions. [2023-02-15 20:46:50,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-15 20:46:50,858 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:46:50,858 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:46:50,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-15 20:46:51,063 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 20:46:51,063 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:46:51,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:46:51,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 2 times [2023-02-15 20:46:51,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:46:51,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848289141] [2023-02-15 20:46:51,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:51,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:46:51,072 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:46:51,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851570932] [2023-02-15 20:46:51,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:46:51,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:51,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:46:51,074 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 20:46:51,080 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 20:46:51,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:46:51,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:46:51,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 69 conjunts are in the unsatisfiable core [2023-02-15 20:46:51,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:46:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-15 20:46:51,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:46:53,333 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-15 20:46:53,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:46:53,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848289141] [2023-02-15 20:46:53,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:46:53,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851570932] [2023-02-15 20:46:53,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851570932] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:46:53,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:46:53,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-02-15 20:46:53,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425896876] [2023-02-15 20:46:53,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:46:53,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 20:46:53,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:46:53,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 20:46:53,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2023-02-15 20:46:53,335 INFO L87 Difference]: Start difference. First operand 239 states and 326 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 25 states have internal predecessors, (59), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-15 20:46:55,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:47:07,938 WARN L539 Checker$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 20:47:21,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:47:21,955 INFO L93 Difference]: Finished difference Result 391 states and 540 transitions. [2023-02-15 20:47:21,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-15 20:47:21,956 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 25 states have internal predecessors, (59), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 73 [2023-02-15 20:47:21,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:47:21,958 INFO L225 Difference]: With dead ends: 391 [2023-02-15 20:47:21,958 INFO L226 Difference]: Without dead ends: 389 [2023-02-15 20:47:21,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=563, Invalid=2407, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 20:47:21,960 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 244 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 300 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:47:21,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 472 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 1416 Invalid, 2 Unknown, 0 Unchecked, 17.1s Time] [2023-02-15 20:47:21,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-02-15 20:47:22,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 332. [2023-02-15 20:47:22,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 204 states have (on average 1.1911764705882353) internal successors, (243), 205 states have internal predecessors, (243), 109 states have call successors, (109), 18 states have call predecessors, (109), 18 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2023-02-15 20:47:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 460 transitions. [2023-02-15 20:47:22,151 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 460 transitions. Word has length 73 [2023-02-15 20:47:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:47:22,152 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 460 transitions. [2023-02-15 20:47:22,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 25 states have internal predecessors, (59), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-15 20:47:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 460 transitions. [2023-02-15 20:47:22,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-15 20:47:22,153 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:47:22,153 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:47:22,161 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 20:47:22,359 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 20:47:22,359 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:47:22,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:47:22,360 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2023-02-15 20:47:22,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:47:22,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347345085] [2023-02-15 20:47:22,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:47:22,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:47:22,369 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:47:22,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789242661] [2023-02-15 20:47:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:47:22,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:47:22,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:47:22,374 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 20:47:22,376 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 20:47:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:47:22,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-15 20:47:22,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:47:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-02-15 20:47:23,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:47:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-02-15 20:47:30,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:47:30,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347345085] [2023-02-15 20:47:30,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:47:30,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789242661] [2023-02-15 20:47:30,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789242661] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:47:30,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:47:30,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-02-15 20:47:30,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016936694] [2023-02-15 20:47:30,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:47:30,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 20:47:30,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:47:30,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 20:47:30,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 20:47:30,351 INFO L87 Difference]: Start difference. First operand 332 states and 460 transitions. Second operand has 33 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-02-15 20:47:41,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:47:53,164 WARN L539 Checker$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 20:48:04,505 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 20:48:19,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:19,771 INFO L93 Difference]: Finished difference Result 535 states and 757 transitions. [2023-02-15 20:48:19,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-15 20:48:19,772 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 87 [2023-02-15 20:48:19,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:19,774 INFO L225 Difference]: With dead ends: 535 [2023-02-15 20:48:19,774 INFO L226 Difference]: Without dead ends: 527 [2023-02-15 20:48:19,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=1499, Invalid=6873, Unknown=0, NotChecked=0, Total=8372 [2023-02-15 20:48:19,777 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 356 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 2861 mSolverCounterSat, 625 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 3489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 2861 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.9s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:19,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 491 Invalid, 3489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 2861 Invalid, 3 Unknown, 0 Unchecked, 24.9s Time] [2023-02-15 20:48:19,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2023-02-15 20:48:20,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 489. [2023-02-15 20:48:20,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 301 states have (on average 1.2093023255813953) internal successors, (364), 302 states have internal predecessors, (364), 165 states have call successors, (165), 22 states have call predecessors, (165), 22 states have return successors, (164), 164 states have call predecessors, (164), 164 states have call successors, (164) [2023-02-15 20:48:20,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 693 transitions. [2023-02-15 20:48:20,116 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 693 transitions. Word has length 87 [2023-02-15 20:48:20,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:20,117 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 693 transitions. [2023-02-15 20:48:20,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-02-15 20:48:20,117 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 693 transitions. [2023-02-15 20:48:20,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-15 20:48:20,119 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:20,119 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:20,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-15 20:48:20,325 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 20:48:20,329 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:20,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:20,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1330396859, now seen corresponding path program 2 times [2023-02-15 20:48:20,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:20,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19248026] [2023-02-15 20:48:20,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:20,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:20,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:20,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368329861] [2023-02-15 20:48:20,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:48:20,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:20,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:20,359 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 20:48:20,362 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 20:48:20,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:48:20,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:48:20,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 20:48:20,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-02-15 20:48:20,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-02-15 20:48:20,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:20,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19248026] [2023-02-15 20:48:20,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:20,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368329861] [2023-02-15 20:48:20,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368329861] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:20,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:20,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2023-02-15 20:48:20,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691444957] [2023-02-15 20:48:20,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:20,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 20:48:20,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:20,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 20:48:20,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-02-15 20:48:20,619 INFO L87 Difference]: Start difference. First operand 489 states and 693 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-15 20:48:21,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:48:21,670 INFO L93 Difference]: Finished difference Result 604 states and 857 transitions. [2023-02-15 20:48:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 20:48:21,671 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 95 [2023-02-15 20:48:21,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:48:21,673 INFO L225 Difference]: With dead ends: 604 [2023-02-15 20:48:21,673 INFO L226 Difference]: Without dead ends: 597 [2023-02-15 20:48:21,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 179 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2023-02-15 20:48:21,675 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 77 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:48:21,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 394 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 20:48:21,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2023-02-15 20:48:22,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 452. [2023-02-15 20:48:22,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 272 states have (on average 1.2169117647058822) internal successors, (331), 273 states have internal predecessors, (331), 157 states have call successors, (157), 22 states have call predecessors, (157), 22 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2023-02-15 20:48:22,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 644 transitions. [2023-02-15 20:48:22,008 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 644 transitions. Word has length 95 [2023-02-15 20:48:22,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:48:22,008 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 644 transitions. [2023-02-15 20:48:22,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-15 20:48:22,009 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 644 transitions. [2023-02-15 20:48:22,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-02-15 20:48:22,010 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:48:22,011 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:48:22,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 20:48:22,216 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 20:48:22,217 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:48:22,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:48:22,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2024025072, now seen corresponding path program 2 times [2023-02-15 20:48:22,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:48:22,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224488478] [2023-02-15 20:48:22,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:48:22,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:48:22,229 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:48:22,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856711217] [2023-02-15 20:48:22,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:48:22,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:48:22,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:48:22,231 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 20:48:22,235 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 20:48:22,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:48:22,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:48:22,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-15 20:48:22,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:48:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 56 proven. 37 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-02-15 20:48:23,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:48:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 50 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-02-15 20:48:27,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:48:27,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224488478] [2023-02-15 20:48:27,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:48:27,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856711217] [2023-02-15 20:48:27,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856711217] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:48:27,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:48:27,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2023-02-15 20:48:27,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466387782] [2023-02-15 20:48:27,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:48:27,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 20:48:27,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:48:27,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 20:48:27,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2023-02-15 20:48:27,256 INFO L87 Difference]: Start difference. First operand 452 states and 644 transitions. Second operand has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-02-15 20:48:48,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:48:50,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:49:32,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:49:32,562 INFO L93 Difference]: Finished difference Result 874 states and 1263 transitions. [2023-02-15 20:49:32,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-15 20:49:32,563 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 107 [2023-02-15 20:49:32,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:49:32,566 INFO L225 Difference]: With dead ends: 874 [2023-02-15 20:49:32,567 INFO L226 Difference]: Without dead ends: 690 [2023-02-15 20:49:32,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=1595, Invalid=7147, Unknown=0, NotChecked=0, Total=8742 [2023-02-15 20:49:32,569 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 238 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 2502 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 2915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 2502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.8s IncrementalHoareTripleChecker+Time [2023-02-15 20:49:32,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 423 Invalid, 2915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 2502 Invalid, 0 Unknown, 0 Unchecked, 30.8s Time] [2023-02-15 20:49:32,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2023-02-15 20:49:33,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 618. [2023-02-15 20:49:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 366 states have (on average 1.221311475409836) internal successors, (447), 367 states have internal predecessors, (447), 225 states have call successors, (225), 26 states have call predecessors, (225), 26 states have return successors, (224), 224 states have call predecessors, (224), 224 states have call successors, (224) [2023-02-15 20:49:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 896 transitions. [2023-02-15 20:49:33,099 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 896 transitions. Word has length 107 [2023-02-15 20:49:33,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:49:33,099 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 896 transitions. [2023-02-15 20:49:33,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-02-15 20:49:33,099 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 896 transitions. [2023-02-15 20:49:33,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-15 20:49:33,101 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:49:33,102 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:49:33,109 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 20:49:33,307 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 20:49:33,307 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:49:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:49:33,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1576994048, now seen corresponding path program 1 times [2023-02-15 20:49:33,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:49:33,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740689149] [2023-02-15 20:49:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:49:33,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:49:33,322 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:49:33,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875517992] [2023-02-15 20:49:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:49:33,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:49:33,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:49:33,323 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 20:49:33,328 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 20:49:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:49:33,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 20:49:33,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:49:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 48 proven. 30 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2023-02-15 20:49:33,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:49:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2023-02-15 20:49:34,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:49:34,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740689149] [2023-02-15 20:49:34,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:49:34,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875517992] [2023-02-15 20:49:34,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875517992] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:49:34,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:49:34,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-02-15 20:49:34,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749356235] [2023-02-15 20:49:34,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:49:34,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 20:49:34,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:49:34,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 20:49:34,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-02-15 20:49:34,160 INFO L87 Difference]: Start difference. First operand 618 states and 896 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 19 states have internal predecessors, (54), 9 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2023-02-15 20:49:37,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:49:37,492 INFO L93 Difference]: Finished difference Result 1478 states and 2237 transitions. [2023-02-15 20:49:37,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 20:49:37,492 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 19 states have internal predecessors, (54), 9 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 120 [2023-02-15 20:49:37,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:49:37,498 INFO L225 Difference]: With dead ends: 1478 [2023-02-15 20:49:37,498 INFO L226 Difference]: Without dead ends: 1173 [2023-02-15 20:49:37,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=433, Invalid=1729, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 20:49:37,500 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 169 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:49:37,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 493 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 20:49:37,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2023-02-15 20:49:38,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 1079. [2023-02-15 20:49:38,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 554 states have (on average 1.2761732851985559) internal successors, (707), 559 states have internal predecessors, (707), 492 states have call successors, (492), 32 states have call predecessors, (492), 32 states have return successors, (491), 487 states have call predecessors, (491), 491 states have call successors, (491) [2023-02-15 20:49:38,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1690 transitions. [2023-02-15 20:49:38,630 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1690 transitions. Word has length 120 [2023-02-15 20:49:38,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:49:38,631 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 1690 transitions. [2023-02-15 20:49:38,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 19 states have internal predecessors, (54), 9 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2023-02-15 20:49:38,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1690 transitions. [2023-02-15 20:49:38,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-15 20:49:38,633 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:49:38,633 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:49:38,641 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 20:49:38,839 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 20:49:38,839 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:49:38,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:49:38,839 INFO L85 PathProgramCache]: Analyzing trace with hash -843376510, now seen corresponding path program 2 times [2023-02-15 20:49:38,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:49:38,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089465570] [2023-02-15 20:49:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:49:38,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:49:38,849 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:49:38,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261149429] [2023-02-15 20:49:38,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:49:38,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:49:38,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:49:38,857 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 20:49:38,859 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 20:49:38,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:49:38,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:49:38,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-15 20:49:38,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:49:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 92 proven. 64 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2023-02-15 20:49:41,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:49:47,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:49:47,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089465570] [2023-02-15 20:49:47,275 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:49:47,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261149429] [2023-02-15 20:49:47,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261149429] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:49:47,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:49:47,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-15 20:49:47,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723859444] [2023-02-15 20:49:47,276 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:49:47,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 20:49:47,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:49:47,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 20:49:47,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=801, Unknown=2, NotChecked=0, Total=930 [2023-02-15 20:49:47,277 INFO L87 Difference]: Start difference. First operand 1079 states and 1690 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-15 20:49:52,145 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 20:49:53,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:49:53,773 INFO L93 Difference]: Finished difference Result 1130 states and 1739 transitions. [2023-02-15 20:49:53,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 20:49:53,773 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 120 [2023-02-15 20:49:53,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:49:53,778 INFO L225 Difference]: With dead ends: 1130 [2023-02-15 20:49:53,778 INFO L226 Difference]: Without dead ends: 1128 [2023-02-15 20:49:53,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=248, Invalid=1642, Unknown=2, NotChecked=0, Total=1892 [2023-02-15 20:49:53,779 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 84 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 69 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:49:53,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 338 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1322 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-02-15 20:49:53,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2023-02-15 20:49:54,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1112. [2023-02-15 20:49:54,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 578 states have (on average 1.2647058823529411) internal successors, (731), 584 states have internal predecessors, (731), 495 states have call successors, (495), 38 states have call predecessors, (495), 38 states have return successors, (494), 489 states have call predecessors, (494), 494 states have call successors, (494) [2023-02-15 20:49:54,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1720 transitions. [2023-02-15 20:49:54,881 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1720 transitions. Word has length 120 [2023-02-15 20:49:54,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:49:54,881 INFO L495 AbstractCegarLoop]: Abstraction has 1112 states and 1720 transitions. [2023-02-15 20:49:54,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-15 20:49:54,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1720 transitions. [2023-02-15 20:49:54,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-02-15 20:49:54,884 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:49:54,884 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:49:54,890 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 20:49:55,089 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 20:49:55,090 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:49:55,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:49:55,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1948772218, now seen corresponding path program 3 times [2023-02-15 20:49:55,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:49:55,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751842558] [2023-02-15 20:49:55,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:49:55,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:49:55,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:49:55,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938647052] [2023-02-15 20:49:55,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:49:55,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:49:55,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:49:55,099 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 20:49:55,101 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 20:49:55,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 20:49:55,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:49:55,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 103 conjunts are in the unsatisfiable core [2023-02-15 20:49:55,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:49:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 90 proven. 84 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2023-02-15 20:49:58,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:50:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 125 proven. 27 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2023-02-15 20:50:02,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:50:02,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751842558] [2023-02-15 20:50:02,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:50:02,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938647052] [2023-02-15 20:50:02,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938647052] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:50:02,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:50:02,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 38 [2023-02-15 20:50:02,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028160782] [2023-02-15 20:50:02,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:50:02,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 20:50:02,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:50:02,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 20:50:02,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 20:50:02,267 INFO L87 Difference]: Start difference. First operand 1112 states and 1720 transitions. Second operand has 38 states, 36 states have (on average 2.25) internal successors, (81), 32 states have internal predecessors, (81), 12 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (31), 9 states have call predecessors, (31), 10 states have call successors, (31) [2023-02-15 20:50:30,889 WARN L233 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 86 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 20:50:48,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:50:51,034 WARN L539 Checker$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 20:50:52,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []