./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/relax-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/array-examples/relax-2.i -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 d53812dd1177b266d0f37d9b3339dda1620cf3a3734db2ec7312de8297126685 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 09:25:29,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 09:25:29,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 09:25:29,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 09:25:29,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 09:25:29,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 09:25:29,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 09:25:29,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 09:25:29,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 09:25:29,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 09:25:29,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 09:25:29,902 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 09:25:29,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 09:25:29,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 09:25:29,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 09:25:29,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 09:25:29,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 09:25:29,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 09:25:29,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 09:25:29,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 09:25:29,910 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 09:25:29,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 09:25:29,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 09:25:29,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 09:25:29,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 09:25:29,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 09:25:29,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 09:25:29,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 09:25:29,936 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 09:25:29,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 09:25:29,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 09:25:29,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 09:25:29,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 09:25:29,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 09:25:29,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 09:25:29,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 09:25:29,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 09:25:29,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 09:25:29,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 09:25:29,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 09:25:29,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 09:25:29,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 09:25:29,944 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 09:25:29,971 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 09:25:29,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 09:25:29,971 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 09:25:29,972 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 09:25:29,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 09:25:29,972 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 09:25:29,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 09:25:29,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 09:25:29,973 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 09:25:29,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 09:25:29,974 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 09:25:29,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 09:25:29,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 09:25:29,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 09:25:29,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 09:25:29,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 09:25:29,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 09:25:29,975 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 09:25:29,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 09:25:29,975 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 09:25:29,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 09:25:29,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 09:25:29,975 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 09:25:29,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 09:25:29,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 09:25:29,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 09:25:29,976 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 09:25:29,976 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 09:25:29,976 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 09:25:29,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 09:25:29,977 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 09:25:29,977 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 09:25:29,977 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 09:25:29,977 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d53812dd1177b266d0f37d9b3339dda1620cf3a3734db2ec7312de8297126685 [2022-07-13 09:25:30,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 09:25:30,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 09:25:30,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 09:25:30,227 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 09:25:30,231 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 09:25:30,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/relax-2.i [2022-07-13 09:25:30,292 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e8b07fad/7e7f972d8d894722a1b5cded81a8ce10/FLAGa8bb8670a [2022-07-13 09:25:30,730 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 09:25:30,731 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2.i [2022-07-13 09:25:30,742 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e8b07fad/7e7f972d8d894722a1b5cded81a8ce10/FLAGa8bb8670a [2022-07-13 09:25:31,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e8b07fad/7e7f972d8d894722a1b5cded81a8ce10 [2022-07-13 09:25:31,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 09:25:31,107 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 09:25:31,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 09:25:31,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 09:25:31,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 09:25:31,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9415964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31, skipping insertion in model container [2022-07-13 09:25:31,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 09:25:31,153 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 09:25:31,324 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2.i[980,993] [2022-07-13 09:25:31,444 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 09:25:31,449 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 09:25:31,459 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2.i[980,993] [2022-07-13 09:25:31,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 09:25:31,507 INFO L208 MainTranslator]: Completed translation [2022-07-13 09:25:31,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31 WrapperNode [2022-07-13 09:25:31,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 09:25:31,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 09:25:31,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 09:25:31,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 09:25:31,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,537 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,561 INFO L137 Inliner]: procedures = 120, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 135 [2022-07-13 09:25:31,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 09:25:31,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 09:25:31,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 09:25:31,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 09:25:31,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 09:25:31,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 09:25:31,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 09:25:31,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 09:25:31,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 09:25:31,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:31,643 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) [2022-07-13 09:25:31,649 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 [2022-07-13 09:25:31,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 09:25:31,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 09:25:31,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 09:25:31,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 09:25:31,685 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-13 09:25:31,685 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-13 09:25:31,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 09:25:31,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 09:25:31,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 09:25:31,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 09:25:31,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 09:25:31,749 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 09:25:31,750 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 09:25:31,914 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 09:25:31,919 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 09:25:31,919 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-13 09:25:31,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:25:31 BoogieIcfgContainer [2022-07-13 09:25:31,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 09:25:31,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 09:25:31,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 09:25:31,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 09:25:31,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:25:31" (1/3) ... [2022-07-13 09:25:31,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5a9cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:25:31, skipping insertion in model container [2022-07-13 09:25:31,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (2/3) ... [2022-07-13 09:25:31,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5a9cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:25:31, skipping insertion in model container [2022-07-13 09:25:31,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:25:31" (3/3) ... [2022-07-13 09:25:31,927 INFO L111 eAbstractionObserver]: Analyzing ICFG relax-2.i [2022-07-13 09:25:31,937 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 09:25:31,937 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 09:25:31,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 09:25:31,981 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3cfa34d0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@27f2a348 [2022-07-13 09:25:31,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 09:25:31,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 44 states have internal predecessors, (67), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 09:25:31,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-13 09:25:31,994 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:31,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:31,995 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:31,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:31,999 INFO L85 PathProgramCache]: Analyzing trace with hash 229348008, now seen corresponding path program 1 times [2022-07-13 09:25:32,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:32,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718190755] [2022-07-13 09:25:32,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:32,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:25:32,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:32,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718190755] [2022-07-13 09:25:32,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718190755] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:25:32,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 09:25:32,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 09:25:32,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388155680] [2022-07-13 09:25:32,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:25:32,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 09:25:32,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:32,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 09:25:32,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 09:25:32,203 INFO L87 Difference]: Start difference. First operand has 51 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 44 states have internal predecessors, (67), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:32,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:32,245 INFO L93 Difference]: Finished difference Result 110 states and 172 transitions. [2022-07-13 09:25:32,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 09:25:32,247 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-13 09:25:32,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:32,260 INFO L225 Difference]: With dead ends: 110 [2022-07-13 09:25:32,260 INFO L226 Difference]: Without dead ends: 55 [2022-07-13 09:25:32,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 09:25:32,264 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 13 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:32,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 200 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:25:32,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-13 09:25:32,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-07-13 09:25:32,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 42 states have internal predecessors, (57), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 09:25:32,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2022-07-13 09:25:32,314 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 13 [2022-07-13 09:25:32,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:32,314 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2022-07-13 09:25:32,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2022-07-13 09:25:32,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-13 09:25:32,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:32,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:32,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 09:25:32,317 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:32,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:32,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1753731807, now seen corresponding path program 1 times [2022-07-13 09:25:32,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:32,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131910554] [2022-07-13 09:25:32,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:32,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:25:32,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:32,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131910554] [2022-07-13 09:25:32,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131910554] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:25:32,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 09:25:32,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 09:25:32,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794275339] [2022-07-13 09:25:32,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:25:32,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 09:25:32,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:32,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 09:25:32,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 09:25:32,483 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:32,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:32,580 INFO L93 Difference]: Finished difference Result 105 states and 141 transitions. [2022-07-13 09:25:32,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 09:25:32,580 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-13 09:25:32,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:32,581 INFO L225 Difference]: With dead ends: 105 [2022-07-13 09:25:32,581 INFO L226 Difference]: Without dead ends: 69 [2022-07-13 09:25:32,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 09:25:32,587 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 50 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:32,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 262 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:25:32,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-13 09:25:32,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2022-07-13 09:25:32,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 58 states have internal predecessors, (80), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 09:25:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2022-07-13 09:25:32,594 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 15 [2022-07-13 09:25:32,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:32,594 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2022-07-13 09:25:32,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:32,594 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2022-07-13 09:25:32,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 09:25:32,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:32,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:32,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 09:25:32,595 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:32,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:32,596 INFO L85 PathProgramCache]: Analyzing trace with hash 404200823, now seen corresponding path program 1 times [2022-07-13 09:25:32,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:32,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720128707] [2022-07-13 09:25:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:32,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:25:32,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:32,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720128707] [2022-07-13 09:25:32,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720128707] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:25:32,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 09:25:32,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 09:25:32,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422046275] [2022-07-13 09:25:32,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:25:32,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 09:25:32,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:32,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 09:25:32,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 09:25:32,659 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:32,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:32,729 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2022-07-13 09:25:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 09:25:32,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-13 09:25:32,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:32,730 INFO L225 Difference]: With dead ends: 81 [2022-07-13 09:25:32,732 INFO L226 Difference]: Without dead ends: 64 [2022-07-13 09:25:32,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 09:25:32,733 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 34 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:32,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 168 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:25:32,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-13 09:25:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2022-07-13 09:25:32,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 55 states have internal predecessors, (72), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 09:25:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2022-07-13 09:25:32,744 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 16 [2022-07-13 09:25:32,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:32,744 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2022-07-13 09:25:32,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:32,745 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2022-07-13 09:25:32,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 09:25:32,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:32,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:32,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 09:25:32,746 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:32,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:32,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1831341089, now seen corresponding path program 1 times [2022-07-13 09:25:32,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:32,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983408760] [2022-07-13 09:25:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:32,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:25:32,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:32,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983408760] [2022-07-13 09:25:32,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983408760] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:32,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720318166] [2022-07-13 09:25:32,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:32,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:32,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:32,982 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) [2022-07-13 09:25:32,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 09:25:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:33,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 09:25:33,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:25:33,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 09:25:33,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720318166] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:25:33,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 09:25:33,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2022-07-13 09:25:33,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756573913] [2022-07-13 09:25:33,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:25:33,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 09:25:33,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:33,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 09:25:33,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-07-13 09:25:33,173 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:33,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:33,301 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2022-07-13 09:25:33,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 09:25:33,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-13 09:25:33,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:33,315 INFO L225 Difference]: With dead ends: 71 [2022-07-13 09:25:33,315 INFO L226 Difference]: Without dead ends: 69 [2022-07-13 09:25:33,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-13 09:25:33,317 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 76 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:33,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 167 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:25:33,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-13 09:25:33,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2022-07-13 09:25:33,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 58 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 09:25:33,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2022-07-13 09:25:33,325 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 17 [2022-07-13 09:25:33,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:33,325 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2022-07-13 09:25:33,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:33,325 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2022-07-13 09:25:33,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 09:25:33,326 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:33,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:33,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 09:25:33,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:33,549 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:33,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:33,550 INFO L85 PathProgramCache]: Analyzing trace with hash -251411362, now seen corresponding path program 1 times [2022-07-13 09:25:33,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:33,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104728067] [2022-07-13 09:25:33,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:33,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:25:33,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:33,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104728067] [2022-07-13 09:25:33,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104728067] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:25:33,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 09:25:33,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 09:25:33,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131490266] [2022-07-13 09:25:33,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:25:33,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 09:25:33,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:33,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 09:25:33,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 09:25:33,594 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:33,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:33,623 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2022-07-13 09:25:33,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 09:25:33,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-13 09:25:33,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:33,624 INFO L225 Difference]: With dead ends: 78 [2022-07-13 09:25:33,625 INFO L226 Difference]: Without dead ends: 54 [2022-07-13 09:25:33,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 09:25:33,626 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 16 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:33,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 160 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:25:33,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-13 09:25:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-13 09:25:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 46 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 09:25:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-07-13 09:25:33,631 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 18 [2022-07-13 09:25:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:33,632 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-07-13 09:25:33,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-07-13 09:25:33,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 09:25:33,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:33,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:33,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 09:25:33,633 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:33,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:33,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2003533961, now seen corresponding path program 1 times [2022-07-13 09:25:33,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:33,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003192868] [2022-07-13 09:25:33,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:33,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:25:33,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:33,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003192868] [2022-07-13 09:25:33,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003192868] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:33,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911521097] [2022-07-13 09:25:33,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:33,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:33,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:33,841 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) [2022-07-13 09:25:33,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 09:25:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:33,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 09:25:33,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:25:33,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 09:25:33,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911521097] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:25:33,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 09:25:33,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 10 [2022-07-13 09:25:33,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145181269] [2022-07-13 09:25:33,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:25:33,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 09:25:33,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:33,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 09:25:33,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-13 09:25:33,948 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:33,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:33,996 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-07-13 09:25:33,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 09:25:33,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-13 09:25:33,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:33,998 INFO L225 Difference]: With dead ends: 68 [2022-07-13 09:25:33,998 INFO L226 Difference]: Without dead ends: 54 [2022-07-13 09:25:33,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-13 09:25:33,999 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 39 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:33,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 105 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:25:33,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-13 09:25:34,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-13 09:25:34,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 46 states have internal predecessors, (59), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 09:25:34,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2022-07-13 09:25:34,004 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 18 [2022-07-13 09:25:34,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:34,004 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2022-07-13 09:25:34,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:34,005 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2022-07-13 09:25:34,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 09:25:34,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:34,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:34,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 09:25:34,232 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,SelfDestructingSolverStorable5 [2022-07-13 09:25:34,232 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:34,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:34,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1225946208, now seen corresponding path program 1 times [2022-07-13 09:25:34,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:34,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109380233] [2022-07-13 09:25:34,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:34,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:25:34,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:34,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109380233] [2022-07-13 09:25:34,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109380233] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:25:34,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 09:25:34,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 09:25:34,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425247144] [2022-07-13 09:25:34,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:25:34,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 09:25:34,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:34,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 09:25:34,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 09:25:34,252 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:34,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:34,265 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2022-07-13 09:25:34,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 09:25:34,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-13 09:25:34,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:34,266 INFO L225 Difference]: With dead ends: 90 [2022-07-13 09:25:34,266 INFO L226 Difference]: Without dead ends: 76 [2022-07-13 09:25:34,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 09:25:34,267 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 22 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:34,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 120 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:25:34,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-13 09:25:34,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2022-07-13 09:25:34,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.32) internal successors, (66), 51 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 09:25:34,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2022-07-13 09:25:34,284 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 20 [2022-07-13 09:25:34,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:34,284 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2022-07-13 09:25:34,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2022-07-13 09:25:34,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 09:25:34,285 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:34,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:34,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 09:25:34,286 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:34,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:34,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1055739498, now seen corresponding path program 1 times [2022-07-13 09:25:34,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:34,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450548664] [2022-07-13 09:25:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:34,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:25:34,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:34,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450548664] [2022-07-13 09:25:34,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450548664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:34,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212424825] [2022-07-13 09:25:34,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:34,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:34,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:34,451 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) [2022-07-13 09:25:34,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 09:25:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:34,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 09:25:34,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:25:34,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 09:25:34,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212424825] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:25:34,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 09:25:34,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-07-13 09:25:34,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650812382] [2022-07-13 09:25:34,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:25:34,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 09:25:34,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:34,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 09:25:34,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-13 09:25:34,542 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:34,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:34,615 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2022-07-13 09:25:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 09:25:34,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-13 09:25:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:34,616 INFO L225 Difference]: With dead ends: 121 [2022-07-13 09:25:34,617 INFO L226 Difference]: Without dead ends: 61 [2022-07-13 09:25:34,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-13 09:25:34,617 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 31 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:34,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 266 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:25:34,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-13 09:25:34,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-07-13 09:25:34,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 52 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 09:25:34,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2022-07-13 09:25:34,623 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 24 [2022-07-13 09:25:34,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:34,623 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2022-07-13 09:25:34,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:34,623 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2022-07-13 09:25:34,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 09:25:34,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:34,624 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 09:25:34,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 09:25:34,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:34,841 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:34,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:34,842 INFO L85 PathProgramCache]: Analyzing trace with hash -458147624, now seen corresponding path program 1 times [2022-07-13 09:25:34,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:34,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663101553] [2022-07-13 09:25:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:34,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:25:34,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:34,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663101553] [2022-07-13 09:25:34,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663101553] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:34,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324284865] [2022-07-13 09:25:34,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:34,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:34,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:34,890 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) [2022-07-13 09:25:34,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 09:25:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:34,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 09:25:34,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:25:35,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:25:35,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324284865] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:35,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:35,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 10] total 15 [2022-07-13 09:25:35,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860215053] [2022-07-13 09:25:35,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:35,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 09:25:35,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:35,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 09:25:35,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-07-13 09:25:35,169 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 15 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:35,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:35,328 INFO L93 Difference]: Finished difference Result 145 states and 193 transitions. [2022-07-13 09:25:35,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 09:25:35,329 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-13 09:25:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:35,329 INFO L225 Difference]: With dead ends: 145 [2022-07-13 09:25:35,329 INFO L226 Difference]: Without dead ends: 122 [2022-07-13 09:25:35,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-07-13 09:25:35,330 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 236 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:35,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 554 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:25:35,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-13 09:25:35,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 90. [2022-07-13 09:25:35,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 80 states have (on average 1.325) internal successors, (106), 81 states have internal predecessors, (106), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 09:25:35,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 117 transitions. [2022-07-13 09:25:35,352 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 117 transitions. Word has length 26 [2022-07-13 09:25:35,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:35,352 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 117 transitions. [2022-07-13 09:25:35,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:35,353 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 117 transitions. [2022-07-13 09:25:35,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 09:25:35,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:35,353 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 09:25:35,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 09:25:35,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:35,570 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:35,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:35,570 INFO L85 PathProgramCache]: Analyzing trace with hash -456300582, now seen corresponding path program 1 times [2022-07-13 09:25:35,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:35,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679753371] [2022-07-13 09:25:35,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:35,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:25:35,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:35,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679753371] [2022-07-13 09:25:35,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679753371] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:35,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187073651] [2022-07-13 09:25:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:35,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:35,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:35,658 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) [2022-07-13 09:25:35,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 09:25:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:35,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 09:25:35,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 09:25:35,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 09:25:35,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187073651] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:25:35,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 09:25:35,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-07-13 09:25:35,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841845269] [2022-07-13 09:25:35,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:25:35,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 09:25:35,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:35,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 09:25:35,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-13 09:25:35,768 INFO L87 Difference]: Start difference. First operand 90 states and 117 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:35,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:35,822 INFO L93 Difference]: Finished difference Result 124 states and 161 transitions. [2022-07-13 09:25:35,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 09:25:35,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-13 09:25:35,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:35,823 INFO L225 Difference]: With dead ends: 124 [2022-07-13 09:25:35,823 INFO L226 Difference]: Without dead ends: 110 [2022-07-13 09:25:35,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-13 09:25:35,824 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 55 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:35,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 132 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:25:35,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-13 09:25:35,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2022-07-13 09:25:35,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 86 states have (on average 1.313953488372093) internal successors, (113), 87 states have internal predecessors, (113), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 09:25:35,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 124 transitions. [2022-07-13 09:25:35,831 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 124 transitions. Word has length 26 [2022-07-13 09:25:35,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:35,831 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 124 transitions. [2022-07-13 09:25:35,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:35,831 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 124 transitions. [2022-07-13 09:25:35,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-13 09:25:35,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:35,832 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 09:25:35,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-13 09:25:36,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 09:25:36,048 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:36,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:36,049 INFO L85 PathProgramCache]: Analyzing trace with hash -993450261, now seen corresponding path program 1 times [2022-07-13 09:25:36,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:36,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109245402] [2022-07-13 09:25:36,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:36,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 09:25:36,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:36,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109245402] [2022-07-13 09:25:36,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109245402] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:36,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761927716] [2022-07-13 09:25:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:36,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:36,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:36,132 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) [2022-07-13 09:25:36,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 09:25:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:36,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 09:25:36,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:25:36,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:25:36,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761927716] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:36,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:36,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 17 [2022-07-13 09:25:36,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868721934] [2022-07-13 09:25:36,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:36,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 09:25:36,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:36,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 09:25:36,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-07-13 09:25:36,330 INFO L87 Difference]: Start difference. First operand 96 states and 124 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:36,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:36,784 INFO L93 Difference]: Finished difference Result 309 states and 419 transitions. [2022-07-13 09:25:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 09:25:36,785 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-13 09:25:36,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:36,786 INFO L225 Difference]: With dead ends: 309 [2022-07-13 09:25:36,786 INFO L226 Difference]: Without dead ends: 231 [2022-07-13 09:25:36,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2022-07-13 09:25:36,787 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 441 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:36,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 839 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 09:25:36,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-13 09:25:36,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 118. [2022-07-13 09:25:36,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 108 states have (on average 1.3148148148148149) internal successors, (142), 109 states have internal predecessors, (142), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 09:25:36,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 153 transitions. [2022-07-13 09:25:36,799 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 153 transitions. Word has length 27 [2022-07-13 09:25:36,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:36,799 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 153 transitions. [2022-07-13 09:25:36,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:36,799 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 153 transitions. [2022-07-13 09:25:36,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 09:25:36,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:36,800 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 09:25:36,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-13 09:25:37,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:37,035 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:37,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:37,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2085458086, now seen corresponding path program 2 times [2022-07-13 09:25:37,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:37,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492241894] [2022-07-13 09:25:37,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:37,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:25:37,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:37,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492241894] [2022-07-13 09:25:37,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492241894] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:37,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207500996] [2022-07-13 09:25:37,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 09:25:37,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:37,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:37,132 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) [2022-07-13 09:25:37,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 09:25:37,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 09:25:37,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:25:37,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 09:25:37,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 09:25:37,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 09:25:37,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207500996] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:37,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 09:25:37,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 6] total 14 [2022-07-13 09:25:37,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812903119] [2022-07-13 09:25:37,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:25:37,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 09:25:37,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:37,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 09:25:37,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-07-13 09:25:37,346 INFO L87 Difference]: Start difference. First operand 118 states and 153 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:37,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:37,448 INFO L93 Difference]: Finished difference Result 140 states and 181 transitions. [2022-07-13 09:25:37,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 09:25:37,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-13 09:25:37,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:37,449 INFO L225 Difference]: With dead ends: 140 [2022-07-13 09:25:37,449 INFO L226 Difference]: Without dead ends: 132 [2022-07-13 09:25:37,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-07-13 09:25:37,450 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 56 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:37,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 144 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:25:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-13 09:25:37,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 119. [2022-07-13 09:25:37,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 110 states have internal predecessors, (142), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 09:25:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 153 transitions. [2022-07-13 09:25:37,473 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 153 transitions. Word has length 28 [2022-07-13 09:25:37,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:37,473 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 153 transitions. [2022-07-13 09:25:37,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 153 transitions. [2022-07-13 09:25:37,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-13 09:25:37,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:37,474 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 09:25:37,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 09:25:37,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:37,683 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:37,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:37,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1669286615, now seen corresponding path program 1 times [2022-07-13 09:25:37,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:37,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112331593] [2022-07-13 09:25:37,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:37,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:37,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 09:25:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 09:25:37,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:37,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112331593] [2022-07-13 09:25:37,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112331593] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:25:37,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 09:25:37,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 09:25:37,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781348506] [2022-07-13 09:25:37,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:25:37,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 09:25:37,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:37,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 09:25:37,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 09:25:37,735 INFO L87 Difference]: Start difference. First operand 119 states and 153 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 09:25:37,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:37,763 INFO L93 Difference]: Finished difference Result 149 states and 191 transitions. [2022-07-13 09:25:37,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 09:25:37,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-07-13 09:25:37,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:37,764 INFO L225 Difference]: With dead ends: 149 [2022-07-13 09:25:37,764 INFO L226 Difference]: Without dead ends: 128 [2022-07-13 09:25:37,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 09:25:37,765 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 7 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:37,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 114 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:25:37,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-13 09:25:37,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2022-07-13 09:25:37,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 112 states have (on average 1.3035714285714286) internal successors, (146), 113 states have internal predecessors, (146), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 09:25:37,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 157 transitions. [2022-07-13 09:25:37,775 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 157 transitions. Word has length 31 [2022-07-13 09:25:37,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:37,776 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 157 transitions. [2022-07-13 09:25:37,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 09:25:37,776 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 157 transitions. [2022-07-13 09:25:37,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-13 09:25:37,776 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:37,777 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 09:25:37,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 09:25:37,777 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:37,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:37,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1241240931, now seen corresponding path program 1 times [2022-07-13 09:25:37,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:37,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168964188] [2022-07-13 09:25:37,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:37,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 09:25:37,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:37,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168964188] [2022-07-13 09:25:37,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168964188] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:37,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066751188] [2022-07-13 09:25:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:37,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:37,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:37,847 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) [2022-07-13 09:25:37,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 09:25:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:37,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 09:25:37,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:25:38,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 09:25:38,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066751188] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:38,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:38,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 20 [2022-07-13 09:25:38,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428217325] [2022-07-13 09:25:38,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:38,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 09:25:38,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:38,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 09:25:38,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-07-13 09:25:38,131 INFO L87 Difference]: Start difference. First operand 122 states and 157 transitions. Second operand has 20 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 18 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:39,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:39,087 INFO L93 Difference]: Finished difference Result 359 states and 499 transitions. [2022-07-13 09:25:39,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-13 09:25:39,087 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 18 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-13 09:25:39,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:39,088 INFO L225 Difference]: With dead ends: 359 [2022-07-13 09:25:39,088 INFO L226 Difference]: Without dead ends: 329 [2022-07-13 09:25:39,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=322, Invalid=1658, Unknown=0, NotChecked=0, Total=1980 [2022-07-13 09:25:39,090 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 458 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:39,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 1458 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 09:25:39,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-07-13 09:25:39,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 164. [2022-07-13 09:25:39,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 154 states have (on average 1.3506493506493507) internal successors, (208), 155 states have internal predecessors, (208), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 09:25:39,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 219 transitions. [2022-07-13 09:25:39,106 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 219 transitions. Word has length 31 [2022-07-13 09:25:39,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:39,106 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 219 transitions. [2022-07-13 09:25:39,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 18 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:39,106 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 219 transitions. [2022-07-13 09:25:39,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-13 09:25:39,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:39,107 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 09:25:39,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 09:25:39,322 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,SelfDestructingSolverStorable13 [2022-07-13 09:25:39,322 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:39,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:39,323 INFO L85 PathProgramCache]: Analyzing trace with hash 431894305, now seen corresponding path program 1 times [2022-07-13 09:25:39,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:39,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729778360] [2022-07-13 09:25:39,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:39,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 09:25:39,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:39,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729778360] [2022-07-13 09:25:39,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729778360] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:39,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198786487] [2022-07-13 09:25:39,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:39,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:39,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:39,592 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) [2022-07-13 09:25:39,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 09:25:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:39,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-13 09:25:39,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:39,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-13 09:25:39,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 09:25:39,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 09:25:39,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 09:25:39,909 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-13 09:25:39,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 39 [2022-07-13 09:25:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:25:39,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:40,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 09:25:40,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198786487] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:40,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 09:25:40,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11, 13] total 27 [2022-07-13 09:25:40,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127490180] [2022-07-13 09:25:40,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:25:40,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 09:25:40,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:40,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 09:25:40,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-07-13 09:25:40,097 INFO L87 Difference]: Start difference. First operand 164 states and 219 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:40,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:40,451 INFO L93 Difference]: Finished difference Result 327 states and 448 transitions. [2022-07-13 09:25:40,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 09:25:40,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-13 09:25:40,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:40,452 INFO L225 Difference]: With dead ends: 327 [2022-07-13 09:25:40,453 INFO L226 Difference]: Without dead ends: 318 [2022-07-13 09:25:40,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 09:25:40,454 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 175 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:40,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 660 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 09:25:40,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-13 09:25:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 207. [2022-07-13 09:25:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 197 states have (on average 1.3756345177664975) internal successors, (271), 198 states have internal predecessors, (271), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 09:25:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 282 transitions. [2022-07-13 09:25:40,496 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 282 transitions. Word has length 31 [2022-07-13 09:25:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:40,496 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 282 transitions. [2022-07-13 09:25:40,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:40,496 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 282 transitions. [2022-07-13 09:25:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-13 09:25:40,497 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:40,497 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:40,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-13 09:25:40,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 09:25:40,713 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:40,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:40,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1856637752, now seen corresponding path program 1 times [2022-07-13 09:25:40,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:40,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648782848] [2022-07-13 09:25:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:40,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:25:40,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:40,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648782848] [2022-07-13 09:25:40,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648782848] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:40,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68601870] [2022-07-13 09:25:40,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:40,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:40,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:40,962 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) [2022-07-13 09:25:40,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 09:25:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:41,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 09:25:41,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 09:25:41,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 09:25:41,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68601870] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:41,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:41,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 24 [2022-07-13 09:25:41,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158846729] [2022-07-13 09:25:41,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:41,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 09:25:41,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:41,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 09:25:41,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-07-13 09:25:41,142 INFO L87 Difference]: Start difference. First operand 207 states and 282 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:43,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:43,473 INFO L93 Difference]: Finished difference Result 848 states and 1180 transitions. [2022-07-13 09:25:43,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-13 09:25:43,474 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-13 09:25:43,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:43,478 INFO L225 Difference]: With dead ends: 848 [2022-07-13 09:25:43,478 INFO L226 Difference]: Without dead ends: 767 [2022-07-13 09:25:43,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=535, Invalid=3371, Unknown=0, NotChecked=0, Total=3906 [2022-07-13 09:25:43,480 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 1546 mSDsluCounter, 2426 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1550 SdHoareTripleChecker+Valid, 2668 SdHoareTripleChecker+Invalid, 2378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:43,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1550 Valid, 2668 Invalid, 2378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 1956 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 09:25:43,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-07-13 09:25:43,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 168. [2022-07-13 09:25:43,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 158 states have (on average 1.3354430379746836) internal successors, (211), 159 states have internal predecessors, (211), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 09:25:43,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 222 transitions. [2022-07-13 09:25:43,536 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 222 transitions. Word has length 32 [2022-07-13 09:25:43,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:43,537 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 222 transitions. [2022-07-13 09:25:43,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:43,537 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 222 transitions. [2022-07-13 09:25:43,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-13 09:25:43,537 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:43,537 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:43,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 09:25:43,743 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,SelfDestructingSolverStorable15 [2022-07-13 09:25:43,743 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:43,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:43,744 INFO L85 PathProgramCache]: Analyzing trace with hash -337481851, now seen corresponding path program 1 times [2022-07-13 09:25:43,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:43,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47537060] [2022-07-13 09:25:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:43,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 09:25:44,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:44,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47537060] [2022-07-13 09:25:44,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47537060] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:44,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791051801] [2022-07-13 09:25:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:44,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:44,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:44,114 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) [2022-07-13 09:25:44,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 09:25:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:44,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-13 09:25:44,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:44,541 INFO L356 Elim1Store]: treesize reduction 3, result has 78.6 percent of original size [2022-07-13 09:25:44,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2022-07-13 09:25:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 09:25:44,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:44,747 INFO L356 Elim1Store]: treesize reduction 23, result has 78.3 percent of original size [2022-07-13 09:25:44,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 90 [2022-07-13 09:25:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 09:25:45,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791051801] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:45,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:45,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 12] total 38 [2022-07-13 09:25:45,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840529678] [2022-07-13 09:25:45,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:45,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-13 09:25:45,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:45,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-13 09:25:45,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2022-07-13 09:25:45,150 INFO L87 Difference]: Start difference. First operand 168 states and 222 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:46,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:46,216 INFO L93 Difference]: Finished difference Result 425 states and 573 transitions. [2022-07-13 09:25:46,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 09:25:46,217 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-13 09:25:46,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:46,218 INFO L225 Difference]: With dead ends: 425 [2022-07-13 09:25:46,218 INFO L226 Difference]: Without dead ends: 331 [2022-07-13 09:25:46,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=348, Invalid=2102, Unknown=0, NotChecked=0, Total=2450 [2022-07-13 09:25:46,219 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 475 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:46,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 1202 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 09:25:46,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-07-13 09:25:46,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 180. [2022-07-13 09:25:46,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 170 states have (on average 1.3294117647058823) internal successors, (226), 171 states have internal predecessors, (226), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 09:25:46,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 237 transitions. [2022-07-13 09:25:46,251 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 237 transitions. Word has length 37 [2022-07-13 09:25:46,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:46,251 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 237 transitions. [2022-07-13 09:25:46,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:46,251 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 237 transitions. [2022-07-13 09:25:46,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-13 09:25:46,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:46,252 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 09:25:46,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 09:25:46,471 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,SelfDestructingSolverStorable16 [2022-07-13 09:25:46,472 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:46,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:46,472 INFO L85 PathProgramCache]: Analyzing trace with hash 363582727, now seen corresponding path program 1 times [2022-07-13 09:25:46,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:46,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191250943] [2022-07-13 09:25:46,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:46,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 09:25:46,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:46,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191250943] [2022-07-13 09:25:46,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191250943] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:46,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013530892] [2022-07-13 09:25:46,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:46,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:46,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:46,884 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) [2022-07-13 09:25:46,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 09:25:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:46,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-13 09:25:46,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:47,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 09:25:47,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 09:25:47,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 09:25:47,097 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-13 09:25:47,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 39 [2022-07-13 09:25:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 09:25:47,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:47,280 INFO L356 Elim1Store]: treesize reduction 20, result has 80.0 percent of original size [2022-07-13 09:25:47,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 87 [2022-07-13 09:25:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 09:25:47,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013530892] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:47,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:47,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 11] total 24 [2022-07-13 09:25:47,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589415216] [2022-07-13 09:25:47,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:47,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 09:25:47,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:47,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 09:25:47,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-07-13 09:25:47,437 INFO L87 Difference]: Start difference. First operand 180 states and 237 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:47,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:47,787 INFO L93 Difference]: Finished difference Result 311 states and 416 transitions. [2022-07-13 09:25:47,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 09:25:47,788 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-13 09:25:47,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:47,789 INFO L225 Difference]: With dead ends: 311 [2022-07-13 09:25:47,789 INFO L226 Difference]: Without dead ends: 263 [2022-07-13 09:25:47,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2022-07-13 09:25:47,789 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 181 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:47,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 863 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 09:25:47,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-13 09:25:47,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 171. [2022-07-13 09:25:47,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 161 states have (on average 1.31055900621118) internal successors, (211), 162 states have internal predecessors, (211), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 09:25:47,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 222 transitions. [2022-07-13 09:25:47,817 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 222 transitions. Word has length 37 [2022-07-13 09:25:47,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:47,817 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 222 transitions. [2022-07-13 09:25:47,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:47,818 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 222 transitions. [2022-07-13 09:25:47,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-13 09:25:47,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:47,818 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-07-13 09:25:47,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 09:25:48,034 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,SelfDestructingSolverStorable17 [2022-07-13 09:25:48,034 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:48,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:48,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1398313997, now seen corresponding path program 1 times [2022-07-13 09:25:48,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:48,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943032758] [2022-07-13 09:25:48,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:48,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:48,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:48,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 09:25:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:48,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 09:25:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 09:25:48,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:48,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943032758] [2022-07-13 09:25:48,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943032758] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:48,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679643275] [2022-07-13 09:25:48,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:48,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:48,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:48,115 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) [2022-07-13 09:25:48,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 09:25:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:48,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 09:25:48,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:25:48,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:25:48,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679643275] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:48,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:48,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-07-13 09:25:48,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697846635] [2022-07-13 09:25:48,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:48,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 09:25:48,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:48,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 09:25:48,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-07-13 09:25:48,300 INFO L87 Difference]: Start difference. First operand 171 states and 222 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 09:25:48,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:48,521 INFO L93 Difference]: Finished difference Result 220 states and 284 transitions. [2022-07-13 09:25:48,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 09:25:48,521 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 40 [2022-07-13 09:25:48,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:48,522 INFO L225 Difference]: With dead ends: 220 [2022-07-13 09:25:48,522 INFO L226 Difference]: Without dead ends: 170 [2022-07-13 09:25:48,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-07-13 09:25:48,523 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 82 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:48,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 460 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:25:48,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-13 09:25:48,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 159. [2022-07-13 09:25:48,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 149 states have (on average 1.3154362416107384) internal successors, (196), 150 states have internal predecessors, (196), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 09:25:48,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 207 transitions. [2022-07-13 09:25:48,550 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 207 transitions. Word has length 40 [2022-07-13 09:25:48,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:48,550 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 207 transitions. [2022-07-13 09:25:48,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 09:25:48,551 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 207 transitions. [2022-07-13 09:25:48,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 09:25:48,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:48,551 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:48,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-13 09:25:48,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:48,770 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:48,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:48,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1574291585, now seen corresponding path program 1 times [2022-07-13 09:25:48,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:48,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280534007] [2022-07-13 09:25:48,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:48,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 09:25:48,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:48,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280534007] [2022-07-13 09:25:48,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280534007] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:48,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375466873] [2022-07-13 09:25:48,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:48,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:48,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:48,856 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) [2022-07-13 09:25:48,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 09:25:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:48,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-13 09:25:48,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:49,102 INFO L356 Elim1Store]: treesize reduction 87, result has 36.0 percent of original size [2022-07-13 09:25:49,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 84 [2022-07-13 09:25:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 09:25:49,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:49,370 INFO L356 Elim1Store]: treesize reduction 26, result has 76.8 percent of original size [2022-07-13 09:25:49,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-07-13 09:25:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 09:25:49,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375466873] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:49,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:49,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 14] total 29 [2022-07-13 09:25:49,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648982289] [2022-07-13 09:25:49,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:49,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 09:25:49,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:49,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 09:25:49,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2022-07-13 09:25:49,667 INFO L87 Difference]: Start difference. First operand 159 states and 207 transitions. Second operand has 29 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 28 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:52,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:52,239 INFO L93 Difference]: Finished difference Result 894 states and 1238 transitions. [2022-07-13 09:25:52,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-13 09:25:52,239 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 28 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-13 09:25:52,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:52,244 INFO L225 Difference]: With dead ends: 894 [2022-07-13 09:25:52,244 INFO L226 Difference]: Without dead ends: 769 [2022-07-13 09:25:52,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=528, Invalid=3504, Unknown=0, NotChecked=0, Total=4032 [2022-07-13 09:25:52,247 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 1200 mSDsluCounter, 2631 mSDsCounter, 0 mSdLazyCounter, 2464 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 2832 SdHoareTripleChecker+Invalid, 2889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 2464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:52,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 2832 Invalid, 2889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 2464 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 09:25:52,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-07-13 09:25:52,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 270. [2022-07-13 09:25:52,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 259 states have (on average 1.3281853281853282) internal successors, (344), 260 states have internal predecessors, (344), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 09:25:52,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 357 transitions. [2022-07-13 09:25:52,313 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 357 transitions. Word has length 39 [2022-07-13 09:25:52,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:52,314 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 357 transitions. [2022-07-13 09:25:52,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 28 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:52,314 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 357 transitions. [2022-07-13 09:25:52,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-13 09:25:52,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:52,315 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:52,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 09:25:52,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:52,533 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:52,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:52,534 INFO L85 PathProgramCache]: Analyzing trace with hash 916341538, now seen corresponding path program 1 times [2022-07-13 09:25:52,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:52,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328825932] [2022-07-13 09:25:52,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:52,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 09:25:52,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:52,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328825932] [2022-07-13 09:25:52,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328825932] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:52,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908323399] [2022-07-13 09:25:52,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:52,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:52,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:52,717 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) [2022-07-13 09:25:52,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 09:25:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:52,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-13 09:25:52,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 09:25:53,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 09:25:53,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908323399] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:53,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:53,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 23 [2022-07-13 09:25:53,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712814153] [2022-07-13 09:25:53,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:53,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 09:25:53,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:53,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 09:25:53,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-07-13 09:25:53,394 INFO L87 Difference]: Start difference. First operand 270 states and 357 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:54,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:54,786 INFO L93 Difference]: Finished difference Result 726 states and 974 transitions. [2022-07-13 09:25:54,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 09:25:54,787 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-13 09:25:54,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:54,815 INFO L225 Difference]: With dead ends: 726 [2022-07-13 09:25:54,815 INFO L226 Difference]: Without dead ends: 528 [2022-07-13 09:25:54,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 63 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2022-07-13 09:25:54,817 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 791 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:54,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 1156 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 617 Invalid, 0 Unknown, 60 Unchecked, 0.8s Time] [2022-07-13 09:25:54,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-07-13 09:25:54,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 302. [2022-07-13 09:25:54,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 291 states have (on average 1.3402061855670102) internal successors, (390), 292 states have internal predecessors, (390), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 09:25:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 403 transitions. [2022-07-13 09:25:54,936 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 403 transitions. Word has length 40 [2022-07-13 09:25:54,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:54,936 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 403 transitions. [2022-07-13 09:25:54,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:54,937 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 403 transitions. [2022-07-13 09:25:54,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-13 09:25:54,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:54,938 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:54,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 09:25:55,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:55,154 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:55,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:55,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1152781740, now seen corresponding path program 1 times [2022-07-13 09:25:55,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:55,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011019794] [2022-07-13 09:25:55,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:55,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:55,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 09:25:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:55,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 09:25:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 09:25:55,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:55,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011019794] [2022-07-13 09:25:55,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011019794] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:55,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989464461] [2022-07-13 09:25:55,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:55,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:55,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:55,252 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) [2022-07-13 09:25:55,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 09:25:55,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:55,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 09:25:55,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:25:55,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 09:25:55,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989464461] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:55,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:55,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 15 [2022-07-13 09:25:55,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520515287] [2022-07-13 09:25:55,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:55,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 09:25:55,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:55,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 09:25:55,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-07-13 09:25:55,465 INFO L87 Difference]: Start difference. First operand 302 states and 403 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 09:25:55,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:55,797 INFO L93 Difference]: Finished difference Result 373 states and 491 transitions. [2022-07-13 09:25:55,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 09:25:55,799 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2022-07-13 09:25:55,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:55,800 INFO L225 Difference]: With dead ends: 373 [2022-07-13 09:25:55,801 INFO L226 Difference]: Without dead ends: 329 [2022-07-13 09:25:55,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-07-13 09:25:55,801 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 98 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:55,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 486 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 09:25:55,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-07-13 09:25:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 305. [2022-07-13 09:25:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 294 states have (on average 1.3299319727891157) internal successors, (391), 295 states have internal predecessors, (391), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 09:25:55,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 404 transitions. [2022-07-13 09:25:55,879 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 404 transitions. Word has length 43 [2022-07-13 09:25:55,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:55,879 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 404 transitions. [2022-07-13 09:25:55,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 09:25:55,880 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 404 transitions. [2022-07-13 09:25:55,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-13 09:25:55,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:55,881 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-13 09:25:55,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-13 09:25:56,085 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,SelfDestructingSolverStorable21 [2022-07-13 09:25:56,085 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:56,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:56,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1493374564, now seen corresponding path program 2 times [2022-07-13 09:25:56,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:56,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297928396] [2022-07-13 09:25:56,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:56,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:25:56,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:56,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297928396] [2022-07-13 09:25:56,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297928396] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:56,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25377424] [2022-07-13 09:25:56,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 09:25:56,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:56,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:56,409 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) [2022-07-13 09:25:56,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 09:25:56,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 09:25:56,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:25:56,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-13 09:25:56,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 09:25:56,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 09:25:56,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25377424] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:56,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:56,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 32 [2022-07-13 09:25:56,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824781196] [2022-07-13 09:25:56,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:56,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-13 09:25:56,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:56,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-13 09:25:56,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-07-13 09:25:56,775 INFO L87 Difference]: Start difference. First operand 305 states and 404 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:26:08,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:26:08,820 INFO L93 Difference]: Finished difference Result 2242 states and 3045 transitions. [2022-07-13 09:26:08,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-07-13 09:26:08,820 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-13 09:26:08,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:26:08,826 INFO L225 Difference]: With dead ends: 2242 [2022-07-13 09:26:08,826 INFO L226 Difference]: Without dead ends: 2145 [2022-07-13 09:26:08,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6790 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=2308, Invalid=18572, Unknown=0, NotChecked=0, Total=20880 [2022-07-13 09:26:08,834 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 4422 mSDsluCounter, 5863 mSDsCounter, 0 mSdLazyCounter, 4680 mSolverCounterSat, 1228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4426 SdHoareTripleChecker+Valid, 6299 SdHoareTripleChecker+Invalid, 5908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1228 IncrementalHoareTripleChecker+Valid, 4680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:26:08,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4426 Valid, 6299 Invalid, 5908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1228 Valid, 4680 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-13 09:26:08,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2022-07-13 09:26:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 256. [2022-07-13 09:26:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 245 states have (on average 1.310204081632653) internal successors, (321), 246 states have internal predecessors, (321), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 09:26:08,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 334 transitions. [2022-07-13 09:26:08,951 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 334 transitions. Word has length 42 [2022-07-13 09:26:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:26:08,952 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 334 transitions. [2022-07-13 09:26:08,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:26:08,952 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 334 transitions. [2022-07-13 09:26:08,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-13 09:26:08,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:26:08,953 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-07-13 09:26:08,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-13 09:26:09,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:09,168 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:26:09,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:26:09,168 INFO L85 PathProgramCache]: Analyzing trace with hash 841725603, now seen corresponding path program 2 times [2022-07-13 09:26:09,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:26:09,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170196253] [2022-07-13 09:26:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:26:09,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:26:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 09:26:09,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:26:09,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170196253] [2022-07-13 09:26:09,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170196253] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:26:09,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951302644] [2022-07-13 09:26:09,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 09:26:09,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:09,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:26:09,286 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) [2022-07-13 09:26:09,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 09:26:09,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 09:26:09,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:26:09,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 09:26:09,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:26:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 09:26:09,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:26:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-13 09:26:09,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951302644] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:26:09,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:26:09,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2022-07-13 09:26:09,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41891596] [2022-07-13 09:26:09,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:26:09,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 09:26:09,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:26:09,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 09:26:09,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-07-13 09:26:09,566 INFO L87 Difference]: Start difference. First operand 256 states and 334 transitions. Second operand has 21 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:26:09,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:26:09,953 INFO L93 Difference]: Finished difference Result 327 states and 427 transitions. [2022-07-13 09:26:09,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 09:26:09,953 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-13 09:26:09,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:26:09,954 INFO L225 Difference]: With dead ends: 327 [2022-07-13 09:26:09,955 INFO L226 Difference]: Without dead ends: 277 [2022-07-13 09:26:09,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-07-13 09:26:09,957 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 55 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 09:26:09,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 1087 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 09:26:09,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-07-13 09:26:10,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 266. [2022-07-13 09:26:10,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 255 states have (on average 1.3137254901960784) internal successors, (335), 256 states have internal predecessors, (335), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 09:26:10,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 348 transitions. [2022-07-13 09:26:10,056 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 348 transitions. Word has length 43 [2022-07-13 09:26:10,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:26:10,056 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 348 transitions. [2022-07-13 09:26:10,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:26:10,056 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 348 transitions. [2022-07-13 09:26:10,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 09:26:10,057 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:26:10,057 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:26:10,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-13 09:26:10,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:10,290 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:26:10,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:26:10,291 INFO L85 PathProgramCache]: Analyzing trace with hash -2028075032, now seen corresponding path program 1 times [2022-07-13 09:26:10,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:26:10,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571284161] [2022-07-13 09:26:10,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:26:10,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:26:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:10,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 09:26:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:10,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-13 09:26:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 09:26:10,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:26:10,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571284161] [2022-07-13 09:26:10,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571284161] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:26:10,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797288537] [2022-07-13 09:26:10,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:26:10,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:10,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:26:10,514 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:26:10,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 09:26:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:10,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 09:26:10,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:26:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 09:26:10,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:26:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 09:26:10,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797288537] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 09:26:10,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 09:26:10,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12, 7] total 19 [2022-07-13 09:26:10,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321705322] [2022-07-13 09:26:10,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:26:10,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 09:26:10,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:26:10,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 09:26:10,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-07-13 09:26:10,736 INFO L87 Difference]: Start difference. First operand 266 states and 348 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 09:26:10,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:26:10,932 INFO L93 Difference]: Finished difference Result 330 states and 431 transitions. [2022-07-13 09:26:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 09:26:10,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-07-13 09:26:10,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:26:10,934 INFO L225 Difference]: With dead ends: 330 [2022-07-13 09:26:10,934 INFO L226 Difference]: Without dead ends: 294 [2022-07-13 09:26:10,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-07-13 09:26:10,935 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 128 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:26:10,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 138 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:26:10,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-07-13 09:26:11,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 272. [2022-07-13 09:26:11,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 260 states have (on average 1.3038461538461539) internal successors, (339), 261 states have internal predecessors, (339), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 09:26:11,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 354 transitions. [2022-07-13 09:26:11,024 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 354 transitions. Word has length 45 [2022-07-13 09:26:11,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:26:11,024 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 354 transitions. [2022-07-13 09:26:11,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 09:26:11,024 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 354 transitions. [2022-07-13 09:26:11,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-13 09:26:11,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:26:11,025 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:26:11,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-13 09:26:11,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:11,241 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:26:11,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:26:11,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1386234216, now seen corresponding path program 2 times [2022-07-13 09:26:11,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:26:11,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356935056] [2022-07-13 09:26:11,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:26:11,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:26:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:11,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 09:26:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:11,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-13 09:26:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:26:11,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:26:11,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356935056] [2022-07-13 09:26:11,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356935056] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:26:11,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057152181] [2022-07-13 09:26:11,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 09:26:11,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:11,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:26:11,468 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:26:11,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-13 09:26:11,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 09:26:11,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:26:11,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 09:26:11,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:26:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 09:26:11,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:26:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 09:26:11,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057152181] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 09:26:11,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 09:26:11,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [16, 8] total 23 [2022-07-13 09:26:11,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362307211] [2022-07-13 09:26:11,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:26:11,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 09:26:11,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:26:11,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 09:26:11,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-07-13 09:26:11,716 INFO L87 Difference]: Start difference. First operand 272 states and 354 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 09:26:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:26:11,881 INFO L93 Difference]: Finished difference Result 308 states and 396 transitions. [2022-07-13 09:26:11,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 09:26:11,881 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2022-07-13 09:26:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:26:11,882 INFO L225 Difference]: With dead ends: 308 [2022-07-13 09:26:11,882 INFO L226 Difference]: Without dead ends: 268 [2022-07-13 09:26:11,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-07-13 09:26:11,883 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 152 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:26:11,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 100 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:26:11,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-13 09:26:11,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 266. [2022-07-13 09:26:11,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 255 states have (on average 1.3019607843137255) internal successors, (332), 256 states have internal predecessors, (332), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 09:26:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 345 transitions. [2022-07-13 09:26:11,968 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 345 transitions. Word has length 47 [2022-07-13 09:26:11,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:26:11,969 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 345 transitions. [2022-07-13 09:26:11,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 09:26:11,969 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 345 transitions. [2022-07-13 09:26:11,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 09:26:11,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:26:11,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:26:11,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-13 09:26:12,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-13 09:26:12,186 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:26:12,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:26:12,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1011805829, now seen corresponding path program 1 times [2022-07-13 09:26:12,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:26:12,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384483321] [2022-07-13 09:26:12,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:26:12,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:26:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:12,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 09:26:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:12,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 09:26:12,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 09:26:12,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:26:12,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384483321] [2022-07-13 09:26:12,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384483321] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:26:12,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211751924] [2022-07-13 09:26:12,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:26:12,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:12,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:26:12,582 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:26:12,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-13 09:26:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:12,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 09:26:12,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:26:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 09:26:12,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:26:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 09:26:13,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211751924] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:26:13,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:26:13,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 27 [2022-07-13 09:26:13,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804512125] [2022-07-13 09:26:13,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:26:13,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 09:26:13,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:26:13,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 09:26:13,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-07-13 09:26:13,072 INFO L87 Difference]: Start difference. First operand 266 states and 345 transitions. Second operand has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 27 states have internal predecessors, (86), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-13 09:26:15,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:26:15,370 INFO L93 Difference]: Finished difference Result 592 states and 777 transitions. [2022-07-13 09:26:15,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-13 09:26:15,371 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 27 states have internal predecessors, (86), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2022-07-13 09:26:15,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:26:15,374 INFO L225 Difference]: With dead ends: 592 [2022-07-13 09:26:15,374 INFO L226 Difference]: Without dead ends: 520 [2022-07-13 09:26:15,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=421, Invalid=2335, Unknown=0, NotChecked=0, Total=2756 [2022-07-13 09:26:15,375 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 1069 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 09:26:15,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1069 Valid, 977 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 09:26:15,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-07-13 09:26:15,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 266. [2022-07-13 09:26:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 255 states have (on average 1.2784313725490195) internal successors, (326), 256 states have internal predecessors, (326), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 09:26:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 339 transitions. [2022-07-13 09:26:15,514 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 339 transitions. Word has length 48 [2022-07-13 09:26:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:26:15,514 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 339 transitions. [2022-07-13 09:26:15,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 27 states have internal predecessors, (86), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-13 09:26:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 339 transitions. [2022-07-13 09:26:15,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-13 09:26:15,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:26:15,516 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:26:15,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-13 09:26:15,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-13 09:26:15,731 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:26:15,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:26:15,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1719898279, now seen corresponding path program 3 times [2022-07-13 09:26:15,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:26:15,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889321301] [2022-07-13 09:26:15,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:26:15,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:26:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 09:26:16,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:26:16,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889321301] [2022-07-13 09:26:16,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889321301] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:26:16,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821765294] [2022-07-13 09:26:16,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 09:26:16,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:16,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:26:16,193 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:26:16,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-13 09:26:17,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 09:26:17,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:26:17,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-13 09:26:17,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:26:17,554 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-13 09:26:17,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-07-13 09:26:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 09:26:17,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:26:18,067 INFO L356 Elim1Store]: treesize reduction 24, result has 76.0 percent of original size [2022-07-13 09:26:18,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 83 [2022-07-13 09:26:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 09:26:18,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821765294] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:26:18,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:26:18,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 12] total 38 [2022-07-13 09:26:18,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245123325] [2022-07-13 09:26:18,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:26:18,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-13 09:26:18,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:26:18,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-13 09:26:18,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2022-07-13 09:26:18,432 INFO L87 Difference]: Start difference. First operand 266 states and 339 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 38 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:26:22,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:26:22,436 INFO L93 Difference]: Finished difference Result 759 states and 1016 transitions. [2022-07-13 09:26:22,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-13 09:26:22,436 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 38 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-13 09:26:22,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:26:22,446 INFO L225 Difference]: With dead ends: 759 [2022-07-13 09:26:22,446 INFO L226 Difference]: Without dead ends: 651 [2022-07-13 09:26:22,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=880, Invalid=5282, Unknown=0, NotChecked=0, Total=6162 [2022-07-13 09:26:22,451 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 1330 mSDsluCounter, 1809 mSDsCounter, 0 mSdLazyCounter, 2977 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1330 SdHoareTripleChecker+Valid, 1952 SdHoareTripleChecker+Invalid, 3407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 2977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 09:26:22,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1330 Valid, 1952 Invalid, 3407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 2977 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 09:26:22,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-07-13 09:26:22,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 276. [2022-07-13 09:26:22,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 265 states have (on average 1.2679245283018867) internal successors, (336), 266 states have internal predecessors, (336), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 09:26:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 349 transitions. [2022-07-13 09:26:22,603 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 349 transitions. Word has length 47 [2022-07-13 09:26:22,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:26:22,603 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 349 transitions. [2022-07-13 09:26:22,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 38 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:26:22,603 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 349 transitions. [2022-07-13 09:26:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-13 09:26:22,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:26:22,605 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:26:22,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-13 09:26:22,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-13 09:26:22,810 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:26:22,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:26:22,810 INFO L85 PathProgramCache]: Analyzing trace with hash 862887189, now seen corresponding path program 4 times [2022-07-13 09:26:22,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:26:22,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263605504] [2022-07-13 09:26:22,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:26:22,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:26:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 09:26:23,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:26:23,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263605504] [2022-07-13 09:26:23,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263605504] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:26:23,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742427940] [2022-07-13 09:26:23,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 09:26:23,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:23,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:26:23,288 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:26:23,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-13 09:26:23,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 09:26:23,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:26:23,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-13 09:26:23,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:26:23,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 09:26:23,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 09:26:23,678 INFO L356 Elim1Store]: treesize reduction 19, result has 70.3 percent of original size [2022-07-13 09:26:23,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 80 [2022-07-13 09:26:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 09:26:23,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:26:24,000 INFO L356 Elim1Store]: treesize reduction 26, result has 76.8 percent of original size [2022-07-13 09:26:24,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-07-13 09:26:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 09:26:24,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742427940] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:26:24,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:26:24,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 50 [2022-07-13 09:26:24,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673611549] [2022-07-13 09:26:24,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:26:24,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-13 09:26:24,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:26:24,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-13 09:26:24,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2211, Unknown=0, NotChecked=0, Total=2450 [2022-07-13 09:26:24,457 INFO L87 Difference]: Start difference. First operand 276 states and 349 transitions. Second operand has 50 states, 50 states have (on average 2.3) internal successors, (115), 49 states have internal predecessors, (115), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:26:26,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:26:26,110 INFO L93 Difference]: Finished difference Result 472 states and 614 transitions. [2022-07-13 09:26:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-13 09:26:26,110 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.3) internal successors, (115), 49 states have internal predecessors, (115), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-13 09:26:26,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:26:26,112 INFO L225 Difference]: With dead ends: 472 [2022-07-13 09:26:26,112 INFO L226 Difference]: Without dead ends: 441 [2022-07-13 09:26:26,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=576, Invalid=4254, Unknown=0, NotChecked=0, Total=4830 [2022-07-13 09:26:26,113 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 385 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 2021 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 09:26:26,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 2021 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1415 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 09:26:26,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-07-13 09:26:26,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 282. [2022-07-13 09:26:26,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 271 states have (on average 1.2619926199261993) internal successors, (342), 272 states have internal predecessors, (342), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 09:26:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 355 transitions. [2022-07-13 09:26:26,235 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 355 transitions. Word has length 47 [2022-07-13 09:26:26,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:26:26,235 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 355 transitions. [2022-07-13 09:26:26,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.3) internal successors, (115), 49 states have internal predecessors, (115), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:26:26,236 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 355 transitions. [2022-07-13 09:26:26,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-13 09:26:26,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:26:26,236 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:26:26,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-13 09:26:26,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:26,450 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:26:26,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:26:26,451 INFO L85 PathProgramCache]: Analyzing trace with hash -144056787, now seen corresponding path program 5 times [2022-07-13 09:26:26,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:26:26,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031379026] [2022-07-13 09:26:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:26:26,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:26:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 09:26:26,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:26:26,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031379026] [2022-07-13 09:26:26,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031379026] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:26:26,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969315927] [2022-07-13 09:26:26,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 09:26:26,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:26,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:26:26,904 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:26:26,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-13 09:26:27,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-13 09:26:27,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:26:27,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-13 09:26:27,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:26:27,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-13 09:26:27,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 09:26:27,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 09:26:27,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 09:26:27,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 09:26:27,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 09:26:27,760 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 09:26:27,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 39 [2022-07-13 09:26:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:26:27,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:26:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 09:26:28,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969315927] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:26:28,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:26:28,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 17] total 41 [2022-07-13 09:26:28,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920506575] [2022-07-13 09:26:28,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:26:28,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-13 09:26:28,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:26:28,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-13 09:26:28,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1451, Unknown=0, NotChecked=0, Total=1640 [2022-07-13 09:26:28,193 INFO L87 Difference]: Start difference. First operand 282 states and 355 transitions. Second operand has 41 states, 41 states have (on average 2.341463414634146) internal successors, (96), 40 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:26:30,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:26:30,290 INFO L93 Difference]: Finished difference Result 787 states and 1031 transitions. [2022-07-13 09:26:30,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-13 09:26:30,290 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.341463414634146) internal successors, (96), 40 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-13 09:26:30,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:26:30,292 INFO L225 Difference]: With dead ends: 787 [2022-07-13 09:26:30,292 INFO L226 Difference]: Without dead ends: 685 [2022-07-13 09:26:30,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=531, Invalid=4025, Unknown=0, NotChecked=0, Total=4556 [2022-07-13 09:26:30,294 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 439 mSDsluCounter, 2440 mSDsCounter, 0 mSdLazyCounter, 1998 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 2581 SdHoareTripleChecker+Invalid, 2112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 09:26:30,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 2581 Invalid, 2112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1998 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 09:26:30,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-07-13 09:26:30,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 294. [2022-07-13 09:26:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 283 states have (on average 1.2614840989399294) internal successors, (357), 284 states have internal predecessors, (357), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 09:26:30,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 370 transitions. [2022-07-13 09:26:30,416 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 370 transitions. Word has length 47 [2022-07-13 09:26:30,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:26:30,416 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 370 transitions. [2022-07-13 09:26:30,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.341463414634146) internal successors, (96), 40 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:26:30,417 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 370 transitions. [2022-07-13 09:26:30,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 09:26:30,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:26:30,417 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:26:30,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-13 09:26:30,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:30,622 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:26:30,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:26:30,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1577867576, now seen corresponding path program 2 times [2022-07-13 09:26:30,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:26:30,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869580454] [2022-07-13 09:26:30,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:26:30,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:26:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:30,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 09:26:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:30,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 09:26:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 09:26:30,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:26:30,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869580454] [2022-07-13 09:26:30,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869580454] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:26:30,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325987805] [2022-07-13 09:26:30,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 09:26:30,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:30,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:26:30,886 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:26:30,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-13 09:26:30,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 09:26:30,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:26:30,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-13 09:26:30,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:26:31,068 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-13 09:26:31,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-07-13 09:26:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 09:26:31,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:26:31,147 INFO L356 Elim1Store]: treesize reduction 24, result has 76.0 percent of original size [2022-07-13 09:26:31,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 83 [2022-07-13 09:26:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 09:26:31,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325987805] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:26:31,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:26:31,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 22 [2022-07-13 09:26:31,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433237885] [2022-07-13 09:26:31,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:26:31,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 09:26:31,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:26:31,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 09:26:31,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-07-13 09:26:31,332 INFO L87 Difference]: Start difference. First operand 294 states and 370 transitions. Second operand has 22 states, 20 states have (on average 3.85) internal successors, (77), 22 states have internal predecessors, (77), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 09:26:31,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:26:31,891 INFO L93 Difference]: Finished difference Result 437 states and 561 transitions. [2022-07-13 09:26:31,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 09:26:31,892 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.85) internal successors, (77), 22 states have internal predecessors, (77), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2022-07-13 09:26:31,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:26:31,893 INFO L225 Difference]: With dead ends: 437 [2022-07-13 09:26:31,893 INFO L226 Difference]: Without dead ends: 412 [2022-07-13 09:26:31,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2022-07-13 09:26:31,894 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 263 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 09:26:31,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 544 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 09:26:31,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-07-13 09:26:32,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 310. [2022-07-13 09:26:32,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 297 states have (on average 1.2525252525252526) internal successors, (372), 298 states have internal predecessors, (372), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 09:26:32,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 389 transitions. [2022-07-13 09:26:32,027 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 389 transitions. Word has length 51 [2022-07-13 09:26:32,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:26:32,027 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 389 transitions. [2022-07-13 09:26:32,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.85) internal successors, (77), 22 states have internal predecessors, (77), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 09:26:32,027 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 389 transitions. [2022-07-13 09:26:32,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-13 09:26:32,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:26:32,028 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:26:32,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-13 09:26:32,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-13 09:26:32,234 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:26:32,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:26:32,234 INFO L85 PathProgramCache]: Analyzing trace with hash 933712923, now seen corresponding path program 2 times [2022-07-13 09:26:32,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:26:32,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331894999] [2022-07-13 09:26:32,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:26:32,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:26:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 09:26:32,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:26:32,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331894999] [2022-07-13 09:26:32,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331894999] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:26:32,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271730918] [2022-07-13 09:26:32,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 09:26:32,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:32,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:26:32,369 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:26:32,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-13 09:26:32,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 09:26:32,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:26:32,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-13 09:26:32,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:26:32,948 INFO L356 Elim1Store]: treesize reduction 7, result has 56.3 percent of original size [2022-07-13 09:26:32,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2022-07-13 09:26:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 09:26:32,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:26:33,274 INFO L356 Elim1Store]: treesize reduction 26, result has 76.8 percent of original size [2022-07-13 09:26:33,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-07-13 09:26:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 09:26:33,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271730918] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:26:33,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:26:33,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 12] total 31 [2022-07-13 09:26:33,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280046420] [2022-07-13 09:26:33,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:26:33,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 09:26:33,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:26:33,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 09:26:33,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2022-07-13 09:26:33,718 INFO L87 Difference]: Start difference. First operand 310 states and 389 transitions. Second operand has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:26:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:26:37,645 INFO L93 Difference]: Finished difference Result 1181 states and 1552 transitions. [2022-07-13 09:26:37,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-13 09:26:37,646 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-13 09:26:37,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:26:37,649 INFO L225 Difference]: With dead ends: 1181 [2022-07-13 09:26:37,649 INFO L226 Difference]: Without dead ends: 1021 [2022-07-13 09:26:37,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=764, Invalid=5556, Unknown=0, NotChecked=0, Total=6320 [2022-07-13 09:26:37,650 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 1103 mSDsluCounter, 1998 mSDsCounter, 0 mSdLazyCounter, 2577 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 2143 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 2577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 09:26:37,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1111 Valid, 2143 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 2577 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 09:26:37,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-07-13 09:26:37,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 449. [2022-07-13 09:26:37,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 436 states have (on average 1.2660550458715596) internal successors, (552), 437 states have internal predecessors, (552), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 09:26:37,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 569 transitions. [2022-07-13 09:26:37,865 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 569 transitions. Word has length 49 [2022-07-13 09:26:37,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:26:37,865 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 569 transitions. [2022-07-13 09:26:37,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:26:37,866 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 569 transitions. [2022-07-13 09:26:37,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 09:26:37,867 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:26:37,867 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:26:37,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-13 09:26:38,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-13 09:26:38,084 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:26:38,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:26:38,084 INFO L85 PathProgramCache]: Analyzing trace with hash 832365819, now seen corresponding path program 1 times [2022-07-13 09:26:38,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:26:38,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874460188] [2022-07-13 09:26:38,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:26:38,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:26:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:38,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 09:26:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:38,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 09:26:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 09:26:38,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:26:38,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874460188] [2022-07-13 09:26:38,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874460188] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:26:38,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113982523] [2022-07-13 09:26:38,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:26:38,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:38,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:26:38,328 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:26:38,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-13 09:26:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:38,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-13 09:26:38,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:26:39,303 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~pat~0#1.offset_BEFORE_CALL_3| Int)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_3|) 0) (select (select |c_#memory_int| |v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~pat~0#1.offset_BEFORE_CALL_3| 4)))) is different from true [2022-07-13 09:26:40,118 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~pat~0#1.offset_BEFORE_CALL_4| Int)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4|) 0) (select (select |c_#memory_int| |v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~pat~0#1.offset_BEFORE_CALL_4| 4)))) is different from true [2022-07-13 09:26:40,171 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-13 09:26:40,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 10 [2022-07-13 09:26:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 2 not checked. [2022-07-13 09:26:40,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:26:40,320 INFO L356 Elim1Store]: treesize reduction 25, result has 76.4 percent of original size [2022-07-13 09:26:40,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 88 [2022-07-13 09:26:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 09:26:40,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113982523] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:26:40,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:26:40,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 13] total 35 [2022-07-13 09:26:40,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383949307] [2022-07-13 09:26:40,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:26:40,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-13 09:26:40,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:26:40,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-13 09:26:40,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=926, Unknown=2, NotChecked=126, Total=1190 [2022-07-13 09:26:40,661 INFO L87 Difference]: Start difference. First operand 449 states and 569 transitions. Second operand has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 33 states have internal predecessors, (107), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-13 09:26:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:26:44,436 INFO L93 Difference]: Finished difference Result 762 states and 983 transitions. [2022-07-13 09:26:44,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 09:26:44,437 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 33 states have internal predecessors, (107), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 52 [2022-07-13 09:26:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:26:44,438 INFO L225 Difference]: With dead ends: 762 [2022-07-13 09:26:44,438 INFO L226 Difference]: Without dead ends: 619 [2022-07-13 09:26:44,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=214, Invalid=1429, Unknown=5, NotChecked=158, Total=1806 [2022-07-13 09:26:44,440 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 219 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 09:26:44,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 1394 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 744 Invalid, 0 Unknown, 418 Unchecked, 0.3s Time] [2022-07-13 09:26:44,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-07-13 09:26:44,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 470. [2022-07-13 09:26:44,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 452 states have (on average 1.258849557522124) internal successors, (569), 454 states have internal predecessors, (569), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 09:26:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 590 transitions. [2022-07-13 09:26:44,663 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 590 transitions. Word has length 52 [2022-07-13 09:26:44,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:26:44,663 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 590 transitions. [2022-07-13 09:26:44,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 33 states have internal predecessors, (107), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-13 09:26:44,664 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 590 transitions. [2022-07-13 09:26:44,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 09:26:44,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:26:44,665 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:26:44,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-13 09:26:44,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:44,880 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:26:44,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:26:44,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1251822086, now seen corresponding path program 6 times [2022-07-13 09:26:44,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:26:44,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837178366] [2022-07-13 09:26:44,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:26:44,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:26:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 09:26:45,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:26:45,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837178366] [2022-07-13 09:26:45,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837178366] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:26:45,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305362267] [2022-07-13 09:26:45,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 09:26:45,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:45,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:26:45,048 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:26:45,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-13 09:26:45,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-13 09:26:45,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:26:45,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-13 09:26:45,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:26:45,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 09:26:45,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 09:26:45,480 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-07-13 09:26:45,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 38 [2022-07-13 09:26:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 09:26:45,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:26:45,800 INFO L356 Elim1Store]: treesize reduction 30, result has 73.2 percent of original size [2022-07-13 09:26:45,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 89 [2022-07-13 09:26:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 09:26:46,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305362267] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:26:46,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:26:46,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 13] total 34 [2022-07-13 09:26:46,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614641075] [2022-07-13 09:26:46,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:26:46,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 09:26:46,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:26:46,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 09:26:46,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 09:26:46,155 INFO L87 Difference]: Start difference. First operand 470 states and 590 transitions. Second operand has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 33 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:26:51,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:26:51,620 INFO L93 Difference]: Finished difference Result 1569 states and 2030 transitions. [2022-07-13 09:26:51,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-13 09:26:51,621 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 33 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-07-13 09:26:51,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:26:51,626 INFO L225 Difference]: With dead ends: 1569 [2022-07-13 09:26:51,626 INFO L226 Difference]: Without dead ends: 1264 [2022-07-13 09:26:51,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=519, Invalid=3903, Unknown=0, NotChecked=0, Total=4422 [2022-07-13 09:26:51,627 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 967 mSDsluCounter, 2711 mSDsCounter, 0 mSdLazyCounter, 2476 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 2873 SdHoareTripleChecker+Invalid, 2790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 2476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-13 09:26:51,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 2873 Invalid, 2790 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [314 Valid, 2476 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-13 09:26:51,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-07-13 09:26:51,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 520. [2022-07-13 09:26:51,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 502 states have (on average 1.2609561752988048) internal successors, (633), 504 states have internal predecessors, (633), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 09:26:51,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 654 transitions. [2022-07-13 09:26:51,903 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 654 transitions. Word has length 50 [2022-07-13 09:26:51,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:26:51,904 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 654 transitions. [2022-07-13 09:26:51,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 33 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:26:51,904 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 654 transitions. [2022-07-13 09:26:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 09:26:51,905 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:26:51,905 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-07-13 09:26:51,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-13 09:26:52,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:52,109 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:26:52,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:26:52,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1768465341, now seen corresponding path program 1 times [2022-07-13 09:26:52,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:26:52,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264217759] [2022-07-13 09:26:52,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:26:52,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:26:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 09:26:52,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:26:52,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264217759] [2022-07-13 09:26:52,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264217759] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:26:52,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772704626] [2022-07-13 09:26:52,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:26:52,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:52,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:26:52,209 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:26:52,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-13 09:26:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:52,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 09:26:52,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:26:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 09:26:52,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:26:52,599 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 09:26:52,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772704626] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:26:52,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:26:52,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 27 [2022-07-13 09:26:52,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814363551] [2022-07-13 09:26:52,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:26:52,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 09:26:52,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:26:52,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 09:26:52,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2022-07-13 09:26:52,602 INFO L87 Difference]: Start difference. First operand 520 states and 654 transitions. Second operand has 27 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:26:53,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:26:53,590 INFO L93 Difference]: Finished difference Result 733 states and 927 transitions. [2022-07-13 09:26:53,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 09:26:53,591 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-13 09:26:53,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:26:53,594 INFO L225 Difference]: With dead ends: 733 [2022-07-13 09:26:53,594 INFO L226 Difference]: Without dead ends: 620 [2022-07-13 09:26:53,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2022-07-13 09:26:53,595 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 127 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 09:26:53,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 1380 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 09:26:53,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-07-13 09:26:53,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 540. [2022-07-13 09:26:53,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 522 states have (on average 1.2586206896551724) internal successors, (657), 524 states have internal predecessors, (657), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 09:26:53,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 678 transitions. [2022-07-13 09:26:53,871 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 678 transitions. Word has length 51 [2022-07-13 09:26:53,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:26:53,871 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 678 transitions. [2022-07-13 09:26:53,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:26:53,871 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 678 transitions. [2022-07-13 09:26:53,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 09:26:53,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:26:53,872 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:26:53,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-13 09:26:54,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:54,089 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:26:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:26:54,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1341258368, now seen corresponding path program 7 times [2022-07-13 09:26:54,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:26:54,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728996113] [2022-07-13 09:26:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:26:54,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:26:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:26:54,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:26:54,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728996113] [2022-07-13 09:26:54,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728996113] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:26:54,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276140323] [2022-07-13 09:26:54,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 09:26:54,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:54,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:26:54,570 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:26:54,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-13 09:26:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:54,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-13 09:26:54,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:26:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-13 09:26:55,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:26:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-13 09:26:55,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276140323] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:26:55,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:26:55,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 39 [2022-07-13 09:26:55,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404186028] [2022-07-13 09:26:55,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:26:55,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 09:26:55,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:26:55,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 09:26:55,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 09:26:55,349 INFO L87 Difference]: Start difference. First operand 540 states and 678 transitions. Second operand has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 39 states have internal predecessors, (102), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:27:42,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:27:42,150 INFO L93 Difference]: Finished difference Result 3711 states and 4844 transitions. [2022-07-13 09:27:42,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-07-13 09:27:42,151 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 39 states have internal predecessors, (102), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-13 09:27:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:27:42,166 INFO L225 Difference]: With dead ends: 3711 [2022-07-13 09:27:42,166 INFO L226 Difference]: Without dead ends: 3551 [2022-07-13 09:27:42,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14741 ImplicationChecksByTransitivity, 39.8s TimeCoverageRelationStatistics Valid=3816, Invalid=38414, Unknown=0, NotChecked=0, Total=42230 [2022-07-13 09:27:42,169 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 5243 mSDsluCounter, 7011 mSDsCounter, 0 mSdLazyCounter, 5549 mSolverCounterSat, 1353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5251 SdHoareTripleChecker+Valid, 7429 SdHoareTripleChecker+Invalid, 6902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1353 IncrementalHoareTripleChecker+Valid, 5549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-13 09:27:42,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5251 Valid, 7429 Invalid, 6902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1353 Valid, 5549 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-07-13 09:27:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2022-07-13 09:27:42,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 460. [2022-07-13 09:27:42,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 442 states have (on average 1.248868778280543) internal successors, (552), 444 states have internal predecessors, (552), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 09:27:42,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 573 transitions. [2022-07-13 09:27:42,468 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 573 transitions. Word has length 52 [2022-07-13 09:27:42,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:27:42,469 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 573 transitions. [2022-07-13 09:27:42,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 39 states have internal predecessors, (102), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:27:42,469 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 573 transitions. [2022-07-13 09:27:42,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 09:27:42,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:27:42,470 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:27:42,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-13 09:27:42,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-13 09:27:42,692 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:27:42,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:27:42,692 INFO L85 PathProgramCache]: Analyzing trace with hash 446882330, now seen corresponding path program 1 times [2022-07-13 09:27:42,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:27:42,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579168027] [2022-07-13 09:27:42,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:27:42,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:27:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:27:42,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 09:27:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:27:42,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 09:27:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:27:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 09:27:42,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:27:42,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579168027] [2022-07-13 09:27:42,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579168027] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:27:42,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 09:27:42,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 09:27:42,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95374096] [2022-07-13 09:27:42,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:27:42,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 09:27:42,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:27:42,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 09:27:42,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 09:27:42,739 INFO L87 Difference]: Start difference. First operand 460 states and 573 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 09:27:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:27:43,038 INFO L93 Difference]: Finished difference Result 483 states and 600 transitions. [2022-07-13 09:27:43,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 09:27:43,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2022-07-13 09:27:43,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:27:43,040 INFO L225 Difference]: With dead ends: 483 [2022-07-13 09:27:43,040 INFO L226 Difference]: Without dead ends: 462 [2022-07-13 09:27:43,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 09:27:43,041 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 7 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:27:43,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 107 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:27:43,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-07-13 09:27:43,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2022-07-13 09:27:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 442 states have (on average 1.244343891402715) internal successors, (550), 444 states have internal predecessors, (550), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 09:27:43,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 571 transitions. [2022-07-13 09:27:43,330 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 571 transitions. Word has length 57 [2022-07-13 09:27:43,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:27:43,330 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 571 transitions. [2022-07-13 09:27:43,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 09:27:43,330 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 571 transitions. [2022-07-13 09:27:43,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 09:27:43,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:27:43,332 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2022-07-13 09:27:43,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-13 09:27:43,332 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:27:43,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:27:43,332 INFO L85 PathProgramCache]: Analyzing trace with hash 161123635, now seen corresponding path program 1 times [2022-07-13 09:27:43,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:27:43,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256861159] [2022-07-13 09:27:43,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:27:43,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:27:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:27:43,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 09:27:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:27:43,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 09:27:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:27:43,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 09:27:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:27:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 09:27:43,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:27:43,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256861159] [2022-07-13 09:27:43,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256861159] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:27:43,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006397566] [2022-07-13 09:27:43,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:27:43,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:27:43,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:27:43,456 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:27:43,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-13 09:27:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:27:43,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 09:27:43,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:27:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 09:27:43,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:28:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 09:28:44,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006397566] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:28:44,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:28:44,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-07-13 09:28:44,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242964770] [2022-07-13 09:28:44,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:28:44,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 09:28:44,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:28:44,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 09:28:44,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=263, Unknown=23, NotChecked=0, Total=342 [2022-07-13 09:28:44,124 INFO L87 Difference]: Start difference. First operand 460 states and 571 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 09:28:44,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:28:44,804 INFO L93 Difference]: Finished difference Result 559 states and 693 transitions. [2022-07-13 09:28:44,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 09:28:44,805 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 59 [2022-07-13 09:28:44,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:28:44,806 INFO L225 Difference]: With dead ends: 559 [2022-07-13 09:28:44,806 INFO L226 Difference]: Without dead ends: 482 [2022-07-13 09:28:44,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 60.5s TimeCoverageRelationStatistics Valid=61, Invalid=296, Unknown=23, NotChecked=0, Total=380 [2022-07-13 09:28:44,807 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 112 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 09:28:44,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 625 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 294 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2022-07-13 09:28:44,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-07-13 09:28:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 450. [2022-07-13 09:28:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 432 states have (on average 1.2407407407407407) internal successors, (536), 434 states have internal predecessors, (536), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 09:28:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 557 transitions. [2022-07-13 09:28:45,088 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 557 transitions. Word has length 59 [2022-07-13 09:28:45,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:28:45,088 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 557 transitions. [2022-07-13 09:28:45,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 09:28:45,088 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 557 transitions. [2022-07-13 09:28:45,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 09:28:45,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:28:45,089 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 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] [2022-07-13 09:28:45,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-13 09:28:45,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-13 09:28:45,303 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:28:45,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:28:45,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1471487909, now seen corresponding path program 2 times [2022-07-13 09:28:45,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:28:45,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513190278] [2022-07-13 09:28:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:28:45,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:28:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:28:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 09:28:45,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:28:45,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513190278] [2022-07-13 09:28:45,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513190278] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:28:45,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003366040] [2022-07-13 09:28:45,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 09:28:45,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:28:45,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:28:45,490 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:28:45,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-13 09:28:45,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 09:28:45,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:28:45,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 09:28:45,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:28:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-13 09:28:45,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:28:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-13 09:28:45,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003366040] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:28:45,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:28:45,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 26 [2022-07-13 09:28:45,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974255517] [2022-07-13 09:28:45,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:28:45,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 09:28:45,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:28:45,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 09:28:45,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-07-13 09:28:45,995 INFO L87 Difference]: Start difference. First operand 450 states and 557 transitions. Second operand has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 25 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:28:46,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:28:46,927 INFO L93 Difference]: Finished difference Result 516 states and 640 transitions. [2022-07-13 09:28:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 09:28:46,928 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 25 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-13 09:28:46,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:28:46,929 INFO L225 Difference]: With dead ends: 516 [2022-07-13 09:28:46,929 INFO L226 Difference]: Without dead ends: 453 [2022-07-13 09:28:46,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 09:28:46,930 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 61 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1348 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 09:28:46,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1348 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 09:28:46,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-07-13 09:28:47,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 443. [2022-07-13 09:28:47,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 425 states have (on average 1.2470588235294118) internal successors, (530), 427 states have internal predecessors, (530), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 09:28:47,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 551 transitions. [2022-07-13 09:28:47,240 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 551 transitions. Word has length 57 [2022-07-13 09:28:47,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:28:47,240 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 551 transitions. [2022-07-13 09:28:47,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 25 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:28:47,241 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 551 transitions. [2022-07-13 09:28:47,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 09:28:47,242 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:28:47,242 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:28:47,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-13 09:28:47,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-13 09:28:47,451 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:28:47,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:28:47,452 INFO L85 PathProgramCache]: Analyzing trace with hash 289116221, now seen corresponding path program 8 times [2022-07-13 09:28:47,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:28:47,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414441188] [2022-07-13 09:28:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:28:47,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:28:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:28:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 09:28:48,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:28:48,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414441188] [2022-07-13 09:28:48,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414441188] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:28:48,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71562718] [2022-07-13 09:28:48,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 09:28:48,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:28:48,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:28:48,185 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:28:48,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-13 09:28:48,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 09:28:48,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:28:48,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-13 09:28:48,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:28:49,202 INFO L356 Elim1Store]: treesize reduction 3, result has 78.6 percent of original size [2022-07-13 09:28:49,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2022-07-13 09:28:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 09:28:49,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:28:49,703 INFO L356 Elim1Store]: treesize reduction 26, result has 76.8 percent of original size [2022-07-13 09:28:49,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-07-13 09:28:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 09:28:50,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71562718] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:28:50,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:28:50,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 16] total 56 [2022-07-13 09:28:50,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673727511] [2022-07-13 09:28:50,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:28:50,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-13 09:28:50,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:28:50,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-13 09:28:50,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2845, Unknown=0, NotChecked=0, Total=3080 [2022-07-13 09:28:50,366 INFO L87 Difference]: Start difference. First operand 443 states and 551 transitions. Second operand has 56 states, 56 states have (on average 2.375) internal successors, (133), 56 states have internal predecessors, (133), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:28:54,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:28:54,091 INFO L93 Difference]: Finished difference Result 981 states and 1252 transitions. [2022-07-13 09:28:54,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-13 09:28:54,092 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.375) internal successors, (133), 56 states have internal predecessors, (133), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-13 09:28:54,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:28:54,094 INFO L225 Difference]: With dead ends: 981 [2022-07-13 09:28:54,094 INFO L226 Difference]: Without dead ends: 858 [2022-07-13 09:28:54,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=620, Invalid=6186, Unknown=0, NotChecked=0, Total=6806 [2022-07-13 09:28:54,096 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 757 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 2498 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 2646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 2498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 09:28:54,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 1885 Invalid, 2646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 2498 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 09:28:54,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-07-13 09:28:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 453. [2022-07-13 09:28:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 435 states have (on average 1.2459770114942528) internal successors, (542), 437 states have internal predecessors, (542), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 09:28:54,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 563 transitions. [2022-07-13 09:28:54,393 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 563 transitions. Word has length 57 [2022-07-13 09:28:54,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:28:54,393 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 563 transitions. [2022-07-13 09:28:54,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.375) internal successors, (133), 56 states have internal predecessors, (133), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:28:54,394 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 563 transitions. [2022-07-13 09:28:54,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 09:28:54,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:28:54,396 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:28:54,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-13 09:28:54,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-13 09:28:54,598 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:28:54,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:28:54,598 INFO L85 PathProgramCache]: Analyzing trace with hash -392326355, now seen corresponding path program 9 times [2022-07-13 09:28:54,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:28:54,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170686318] [2022-07-13 09:28:54,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:28:54,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:28:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:28:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 09:28:55,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:28:55,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170686318] [2022-07-13 09:28:55,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170686318] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:28:55,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292342901] [2022-07-13 09:28:55,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 09:28:55,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:28:55,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:28:55,196 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:28:55,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-13 09:28:55,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-13 09:28:55,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:28:55,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-13 09:28:55,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:28:55,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 09:28:55,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 09:28:55,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 09:28:55,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 09:28:55,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 09:28:55,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-13 09:28:56,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 11 [2022-07-13 09:28:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 59 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 09:28:56,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:28:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 09:28:57,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292342901] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:28:57,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:28:57,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 17] total 56 [2022-07-13 09:28:57,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104367920] [2022-07-13 09:28:57,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:28:57,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-13 09:28:57,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:28:57,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-13 09:28:57,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=2788, Unknown=0, NotChecked=0, Total=3080 [2022-07-13 09:28:57,225 INFO L87 Difference]: Start difference. First operand 453 states and 563 transitions. Second operand has 56 states, 56 states have (on average 2.357142857142857) internal successors, (132), 56 states have internal predecessors, (132), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:29:00,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:29:00,959 INFO L93 Difference]: Finished difference Result 987 states and 1259 transitions. [2022-07-13 09:29:00,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-13 09:29:00,959 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.357142857142857) internal successors, (132), 56 states have internal predecessors, (132), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-13 09:29:00,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:29:00,961 INFO L225 Difference]: With dead ends: 987 [2022-07-13 09:29:00,961 INFO L226 Difference]: Without dead ends: 867 [2022-07-13 09:29:00,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=735, Invalid=6405, Unknown=0, NotChecked=0, Total=7140 [2022-07-13 09:29:00,962 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 722 mSDsluCounter, 3308 mSDsCounter, 0 mSdLazyCounter, 2805 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 3456 SdHoareTripleChecker+Invalid, 2944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 2805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 09:29:00,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 3456 Invalid, 2944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 2805 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 09:29:00,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-07-13 09:29:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 463. [2022-07-13 09:29:01,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 445 states have (on average 1.2449438202247192) internal successors, (554), 447 states have internal predecessors, (554), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 09:29:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 575 transitions. [2022-07-13 09:29:01,256 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 575 transitions. Word has length 57 [2022-07-13 09:29:01,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:29:01,256 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 575 transitions. [2022-07-13 09:29:01,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.357142857142857) internal successors, (132), 56 states have internal predecessors, (132), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:29:01,256 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 575 transitions. [2022-07-13 09:29:01,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 09:29:01,257 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:29:01,257 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:29:01,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-13 09:29:01,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:29:01,462 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:29:01,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:29:01,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1062300221, now seen corresponding path program 10 times [2022-07-13 09:29:01,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:29:01,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705821543] [2022-07-13 09:29:01,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:29:01,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:29:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:29:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 09:29:02,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:29:02,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705821543] [2022-07-13 09:29:02,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705821543] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:29:02,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634394447] [2022-07-13 09:29:02,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 09:29:02,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:29:02,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:29:02,084 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:29:02,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-13 09:29:02,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 09:29:02,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:29:02,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-13 09:29:02,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:29:02,797 INFO L356 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2022-07-13 09:29:02,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 22 [2022-07-13 09:29:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 09:29:02,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:29:03,230 INFO L356 Elim1Store]: treesize reduction 26, result has 76.8 percent of original size [2022-07-13 09:29:03,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-07-13 09:29:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 09:29:03,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634394447] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:29:03,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:29:03,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 16] total 54 [2022-07-13 09:29:03,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970191484] [2022-07-13 09:29:03,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:29:03,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-13 09:29:03,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:29:03,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-13 09:29:03,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2650, Unknown=0, NotChecked=0, Total=2862 [2022-07-13 09:29:03,984 INFO L87 Difference]: Start difference. First operand 463 states and 575 transitions. Second operand has 54 states, 54 states have (on average 2.3333333333333335) internal successors, (126), 54 states have internal predecessors, (126), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:29:08,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:29:08,174 INFO L93 Difference]: Finished difference Result 1030 states and 1339 transitions. [2022-07-13 09:29:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-13 09:29:08,179 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.3333333333333335) internal successors, (126), 54 states have internal predecessors, (126), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-13 09:29:08,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:29:08,181 INFO L225 Difference]: With dead ends: 1030 [2022-07-13 09:29:08,181 INFO L226 Difference]: Without dead ends: 993 [2022-07-13 09:29:08,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=588, Invalid=6384, Unknown=0, NotChecked=0, Total=6972 [2022-07-13 09:29:08,184 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 848 mSDsluCounter, 3553 mSDsCounter, 0 mSdLazyCounter, 3248 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 3718 SdHoareTripleChecker+Invalid, 3424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 3248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:29:08,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 3718 Invalid, 3424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 3248 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 09:29:08,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-07-13 09:29:08,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 475. [2022-07-13 09:29:08,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 457 states have (on average 1.2450765864332605) internal successors, (569), 459 states have internal predecessors, (569), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 09:29:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 590 transitions. [2022-07-13 09:29:08,492 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 590 transitions. Word has length 57 [2022-07-13 09:29:08,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:29:08,492 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 590 transitions. [2022-07-13 09:29:08,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.3333333333333335) internal successors, (126), 54 states have internal predecessors, (126), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:29:08,492 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 590 transitions. [2022-07-13 09:29:08,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-13 09:29:08,516 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:29:08,517 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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, 1, 1, 1, 1] [2022-07-13 09:29:08,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-13 09:29:08,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-13 09:29:08,733 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:29:08,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:29:08,734 INFO L85 PathProgramCache]: Analyzing trace with hash -359161805, now seen corresponding path program 1 times [2022-07-13 09:29:08,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:29:08,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826024057] [2022-07-13 09:29:08,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:29:08,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:29:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:29:08,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 09:29:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:29:08,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 09:29:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:29:08,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-13 09:29:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:29:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 09:29:08,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:29:08,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826024057] [2022-07-13 09:29:08,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826024057] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:29:08,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872640742] [2022-07-13 09:29:08,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:29:08,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:29:08,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:29:08,899 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:29:08,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-13 09:29:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:29:09,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 09:29:09,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:29:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 09:29:09,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:29:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 09:29:09,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872640742] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:29:09,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:29:09,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-07-13 09:29:09,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671439669] [2022-07-13 09:29:09,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:29:09,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 09:29:09,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:29:09,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 09:29:09,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-07-13 09:29:09,398 INFO L87 Difference]: Start difference. First operand 475 states and 590 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 states have internal predecessors, (74), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 09:29:10,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:29:10,148 INFO L93 Difference]: Finished difference Result 538 states and 669 transitions. [2022-07-13 09:29:10,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 09:29:10,149 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 states have internal predecessors, (74), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 61 [2022-07-13 09:29:10,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:29:10,152 INFO L225 Difference]: With dead ends: 538 [2022-07-13 09:29:10,152 INFO L226 Difference]: Without dead ends: 461 [2022-07-13 09:29:10,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-07-13 09:29:10,153 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 75 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 09:29:10,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 723 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 09:29:10,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-07-13 09:29:10,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 460. [2022-07-13 09:29:10,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 442 states have (on average 1.244343891402715) internal successors, (550), 444 states have internal predecessors, (550), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 09:29:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 571 transitions. [2022-07-13 09:29:10,443 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 571 transitions. Word has length 61 [2022-07-13 09:29:10,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:29:10,443 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 571 transitions. [2022-07-13 09:29:10,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 states have internal predecessors, (74), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 09:29:10,444 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 571 transitions. [2022-07-13 09:29:10,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 09:29:10,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:29:10,445 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:29:10,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-13 09:29:10,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:29:10,661 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:29:10,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:29:10,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1331257673, now seen corresponding path program 3 times [2022-07-13 09:29:10,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:29:10,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996110171] [2022-07-13 09:29:10,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:29:10,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:29:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:29:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 09:29:10,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:29:10,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996110171] [2022-07-13 09:29:10,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996110171] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:29:10,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498980507] [2022-07-13 09:29:10,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 09:29:10,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:29:10,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:29:10,916 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:29:10,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-13 09:29:11,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-13 09:29:11,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:29:11,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-13 09:29:11,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:29:12,121 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 09:29:12,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-07-13 09:29:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 09:29:12,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:29:12,514 INFO L356 Elim1Store]: treesize reduction 26, result has 76.8 percent of original size [2022-07-13 09:29:12,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-07-13 09:29:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 09:29:13,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498980507] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:29:13,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:29:13,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 14] total 43 [2022-07-13 09:29:13,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756412774] [2022-07-13 09:29:13,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:29:13,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-13 09:29:13,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:29:13,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-13 09:29:13,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1663, Unknown=0, NotChecked=0, Total=1806 [2022-07-13 09:29:13,154 INFO L87 Difference]: Start difference. First operand 460 states and 571 transitions. Second operand has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:29:23,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:29:23,431 INFO L93 Difference]: Finished difference Result 1728 states and 2230 transitions. [2022-07-13 09:29:23,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-07-13 09:29:23,431 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-13 09:29:23,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:29:23,447 INFO L225 Difference]: With dead ends: 1728 [2022-07-13 09:29:23,460 INFO L226 Difference]: Without dead ends: 1515 [2022-07-13 09:29:23,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2571 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1174, Invalid=9746, Unknown=0, NotChecked=0, Total=10920 [2022-07-13 09:29:23,462 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 1315 mSDsluCounter, 3552 mSDsCounter, 0 mSdLazyCounter, 4456 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 3761 SdHoareTripleChecker+Invalid, 5006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 4456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:29:23,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1327 Valid, 3761 Invalid, 5006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 4456 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-07-13 09:29:23,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2022-07-13 09:29:23,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 651. [2022-07-13 09:29:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 633 states have (on average 1.2527646129541865) internal successors, (793), 635 states have internal predecessors, (793), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 09:29:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 814 transitions. [2022-07-13 09:29:23,919 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 814 transitions. Word has length 59 [2022-07-13 09:29:23,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:29:23,920 INFO L495 AbstractCegarLoop]: Abstraction has 651 states and 814 transitions. [2022-07-13 09:29:23,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:29:23,920 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 814 transitions. [2022-07-13 09:29:23,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 09:29:23,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:29:23,921 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:29:23,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-13 09:29:24,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:29:24,125 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:29:24,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:29:24,126 INFO L85 PathProgramCache]: Analyzing trace with hash 394119407, now seen corresponding path program 2 times [2022-07-13 09:29:24,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:29:24,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936058028] [2022-07-13 09:29:24,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:29:24,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:29:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:29:24,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 09:29:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:29:24,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 09:29:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:29:24,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-13 09:29:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:29:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 09:29:24,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:29:24,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936058028] [2022-07-13 09:29:24,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936058028] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:29:24,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527492074] [2022-07-13 09:29:24,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 09:29:24,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:29:24,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:29:24,276 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:29:24,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-13 09:29:24,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 09:29:24,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:29:24,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-13 09:29:24,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:29:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 09:29:24,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:29:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 09:29:25,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527492074] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:29:25,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:29:25,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 14] total 33 [2022-07-13 09:29:25,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853376944] [2022-07-13 09:29:25,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:29:25,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-13 09:29:25,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:29:25,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-13 09:29:25,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 09:29:25,124 INFO L87 Difference]: Start difference. First operand 651 states and 814 transitions. Second operand has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 33 states have internal predecessors, (110), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-13 09:29:32,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:29:32,661 INFO L93 Difference]: Finished difference Result 2053 states and 2610 transitions. [2022-07-13 09:29:32,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-13 09:29:32,661 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 33 states have internal predecessors, (110), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 63 [2022-07-13 09:29:32,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:29:32,666 INFO L225 Difference]: With dead ends: 2053 [2022-07-13 09:29:32,666 INFO L226 Difference]: Without dead ends: 1801 [2022-07-13 09:29:32,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2307 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1526, Invalid=7216, Unknown=0, NotChecked=0, Total=8742 [2022-07-13 09:29:32,668 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1734 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1734 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 09:29:32,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1734 Valid, 1016 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 09:29:32,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2022-07-13 09:29:33,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 645. [2022-07-13 09:29:33,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 628 states have (on average 1.234076433121019) internal successors, (775), 630 states have internal predecessors, (775), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 09:29:33,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 794 transitions. [2022-07-13 09:29:33,101 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 794 transitions. Word has length 63 [2022-07-13 09:29:33,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:29:33,101 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 794 transitions. [2022-07-13 09:29:33,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 33 states have internal predecessors, (110), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-13 09:29:33,102 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 794 transitions. [2022-07-13 09:29:33,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 09:29:33,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:29:33,103 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:29:33,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-13 09:29:33,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-13 09:29:33,320 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:29:33,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:29:33,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1226296938, now seen corresponding path program 11 times [2022-07-13 09:29:33,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:29:33,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799827805] [2022-07-13 09:29:33,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:29:33,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:29:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:29:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-13 09:29:33,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:29:33,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799827805] [2022-07-13 09:29:33,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799827805] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:29:33,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718210630] [2022-07-13 09:29:33,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 09:29:33,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:29:33,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:29:33,740 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:29:33,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-13 09:29:45,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-13 09:29:45,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:29:45,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-13 09:29:45,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:29:45,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 09:29:45,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 09:29:45,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 09:29:45,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 09:29:46,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-13 09:29:46,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 09:29:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 13 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 09:29:46,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:29:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 09:29:48,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718210630] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:29:48,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:29:48,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28, 22] total 62 [2022-07-13 09:29:48,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564316391] [2022-07-13 09:29:48,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:29:48,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-13 09:29:48,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:29:48,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-13 09:29:48,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=3495, Unknown=0, NotChecked=0, Total=3782 [2022-07-13 09:29:48,544 INFO L87 Difference]: Start difference. First operand 645 states and 794 transitions. Second operand has 62 states, 62 states have (on average 2.1774193548387095) internal successors, (135), 61 states have internal predecessors, (135), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)